Tighten verification and relationship documentation

Consolidates archive semantics, adds structural relationship and physical-reference validators with tests, binds physical-reference verification to pinned source receipts, and reduces stale explanatory clutter. This PR changes 14 documentation, sidecar, and validation files only; it does not change canonical media or active metadata tables.

CHANGELOG.md

@@ -1,5 +1,27 @@
 # Changelog
 
+## Unreleased — verification and documentation consolidation
+
+- Clarified that each active metadata row represents one published video
+  object, not necessarily one drawing, session, or complete process.
+- Kept documented fragment-sequence and physical-reference relationships in
+  separate sidecars without adding a global `work_id` or changing either
+  29-field active video index.
+- Replaced batch-by-batch README narration and stale Viewer migration counts
+  with current, revision-bound summaries; added a provenance navigation index
+  for the nine documented fragment sequences.
+- Corrected nine physical-reference `hash_state` values that claimed paired
+  hashes despite blank paired filename/hash fields. The correction reports
+  ledger availability only and does not reinterpret any photograph or owner
+  evidence.
+- Added a dedicated physical-reference validator and regression tests; fragment
+  validation now checks canonical byte sizes and states whether a pinned remote
+  inventory was supplied.
+- Removed the unsupported `video-classification` task facet while retaining
+  `feature-extraction` and `annotations_creators: expert-generated`.
+- This consolidation does not alter media, active video-index rows, record
+  identities, or acquisition-protocol identifiers.
+
 ## Unreleased — August 7, 2025 date correction
 
 - Corrected creator-confirmed record `tla-c043b4f55b583c4e` from August 7,

Earlier_Archive_2012_2016/README.md

@@ -5,5 +5,5 @@ dataset. It consists primarily of uploaded 1080p drawing videos, with some
 livestream-derived material.
 
 This directory is a documentation placeholder only. It contains no public
-video data at the current revision, and the earlier archive is excluded from
-the current 467-record, 1.89-TB release totals.
+video data at this revision and is excluded from all published row, byte, and
+duration totals.

Physical_References/MANIFEST.json

@@ -5,10 +5,13 @@
   "dataset_id": "maxwellinked/time-lapse-artifacts",
   "source_hub_revision": "ba7e7903901767f2d5a4367d7ae22c2546366d6d",
   "canonical_metadata_path": "metadata.csv",
+  "source_metadata_sha256": "2062d1ed0ae83a54cac501e1dfcc23bc6cff087d43fd1242fdd19f3028f3d30d",
+  "source_metadata_size_bytes": 190250,
   "sidecar_path": "Physical_References/endpoint_references.csv",
-  "sidecar_sha256": "f0071876769ed4d90ba577ce76535cdc62b44ab27b5a1c575c2542eb60b62152",
+  "sidecar_sha256": "5f3e1ed6c484853cd6df8722e3916b111fc280a1e02a4f9272c0566172821c3a",
   "schema_path": "Physical_References/SCHEMA.md",
   "capture_protocol_path": "Physical_References/CAPTURE_AND_INGEST_PROTOCOL.md",
+  "validator_path": "tools/validate_physical_references.py",
   "canonical_schema_field_count": 29,
   "record_identity": "record_id",
   "reference_identity": "reference_id",

Physical_References/SCHEMA.md

@@ -36,9 +36,21 @@ be independently edited in the sidecar. Blank time remains unknown.
 | `paired_image_filename` | string or blank | Associated back/opposite-side evidence when present. |
 | `reference_image_sha256` | hex or blank | SHA-256 only when found in a current source ledger. |
 | `paired_image_sha256` | hex or blank | SHA-256 only when found in a current source ledger. |
-| `hash_state` | string | Explicit complete, missing, or conflict state. |
+| `hash_state` | string | Mechanical summary of which source-ledger hashes are present. |
 | `source_photo_collection` | semicolon list | Local source-ledger origin, not a public URL. |
 
+`hash_state` must agree with the two hash columns exactly:
+
+| Front hash | Paired hash | Required state |
+| --- | --- | --- |
+| present | present | `front_and_paired_hashes_verified` |
+| present | blank | `front=verified_from_local_source_ledger;paired=not_available_in_current_source_ledgers` |
+| blank | blank, paired filename present | `front=not_available_in_current_source_ledgers;paired=not_available_in_current_source_ledgers` |
+| blank | blank, paired filename blank | `not_available_in_current_source_ledgers` |
+
+A paired hash requires a paired filename. These states report ledger
+availability only; they do not visually authenticate an unbundled photograph.
+
 ## Relationship fields
 
 | Field | Meaning |
@@ -53,10 +65,9 @@ be independently edited in the sidecar. Blank time remains unknown.
 | `owner_evidence` | Human-readable creator confirmation. |
 | `paired_image_evidence` | Human-readable reverse/back qualification. |
 
-Allowed `relationship_type` values in this candidate:
+Observed and currently validated `relationship_type` values:
 
 - `endpoint_photograph`
-- `endpoint_side_reference`
 - `longitudinal_continuation`
 - `owner_confirmed_record_reference`
 - `two_sided_work_reference`
@@ -76,6 +87,22 @@ Blank means unknown, not documented, unavailable in current ledgers, or not
 applicable. It never means zero or false. Do not fill missing hashes, timestamps,
 side roles, or temporal states by visual guess.
 
+## Validation
+
+`Physical_References/MANIFEST.json` binds the sidecar bytes and the exact
+historical `metadata.csv` used for the original join. Validate all structural,
+join, hash-state, count, and manifest invariants with:
+
+```bash
+python tools/validate_physical_references.py \
+  --references Physical_References/endpoint_references.csv \
+  --metadata /path/to/pinned/metadata.csv \
+  --manifest Physical_References/MANIFEST.json
+```
+
+This is consistency validation, not visual re-review. It does not infer a
+pair, endpoint, date, material, or physical state from filenames or images.
+
 ## ML boundary
 
 `machine_use_scope` and `caution` describe supported selection/alignment uses.

Physical_References/endpoint_references.csv

@@ -2,7 +2,7 @@ reference_id,record_id,canonical_file_name,record_date,record_time,dimensions,to
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@@ -88,7 +88,7 @@ tlar-940c5d9a610a68ad,tla-d8150f20cda50475,Standard_Time_Lapses/2025-10-14.1852.
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 tlar-6e39a10667e21d69,tla-b3367c22da62f3ac,Standard_Time_Lapses/2025-10-18.1936.Pencil.Graphite.FountainPen.Ink.Paper.9x12.mp4,2025-10-18,19:36,9x12,Pencil;FountainPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1028.DNG,1028,front,IMG_1029.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B019-BACK-04 paired-back review,"owner-confirmed consecutive back; back inscription: 93; 7:36 PM ET; Saturday; October 18, 2025",4a6c81a0c66534c3fbefcd64f05985fcde526aa87f0c1cc68da22b1ffb55dfb8,15185907292ce9841e4fdc5fd20c10be1b64f0eb44e6716647225e29f1aedfe3,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-259e9ae104c3da9e,tla-30ce6fa8438cd136,Standard_Time_Lapses/2025-10-19.2101.Pencil.Graphite.FountainPen.Ink.Paper.9x12.mp4,2025-10-19,21:01,9x12,Pencil;FountainPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1030.DNG,1030,front,IMG_1031.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B020-BACK-01 paired-back review,"owner-confirmed consecutive back; back inscription: 94; 9:01 PM ET; Sunday; October 19, 2025",da77433c229fde001a9f4185e604b2cd5dd2b2706111075803f40073af07d192,2a44cadb7862682e80e2b0dabf348540602f156f72215d01e34904e1d209be53,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-b323e87432ec1fb7,tla-4b88d25f60dad7a5,Standard_Time_Lapses/2025-10-19.0225.BallpointPen.Ink.Paper.9x12.mp4,2025-10-19,02:25,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1033.DNG,1033,artwork-side-b,IMG_1032.DNG,two_sided_work_reference,physical_side_b,owner_confirmed_record_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_filename_present_relationship_qualified_in_evidence,owner_confirmed_record_link,owner-confirmed-artwork-side-link;opposite-side-unresolved;timestamp-and-playback-corroborated,owner approved B021-BACK-01 paired-back review,owner-confirmed opposite faces of one sheet; IMG_1033 is independently recorded and IMG_1032 remains unresolved,12a0122afb593305e4788b5629fb1da005807e1b3746ce3e185ce3b22ade7e5c,efd142b1adb77b6e0407914b68251d576b7f2d623c474464e625906dfa5d66a1,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,two_sided_work_analysis_not_assumed_same_visual_surface,A physical side or reverse relationship is preserved; visual-surface equivalence is not assumed.
@@ -99,8 +99,8 @@ tlar-e4a7a4e9d1a513d5,tla-2df594e0092c367a,Standard_Time_Lapses/2025-10-21.2319.
 tlar-cd8789789d4cf84b,tla-d0031ca94f3563e3,Standard_Time_Lapses/2025-10-21.2201.Pencil.Graphite.FountainPen.Ink.Paper.9x12.mp4,2025-10-21,22:01,9x12,Pencil;FountainPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1042.DNG,1042,front,IMG_1043.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B020-BACK-02 paired-back review,"owner-confirmed consecutive back; back inscription: 97; 10:01 PM ET; Tuesday; October 21, 2025",8b822f98bafb6041b57238bbca9b4716060541aa73aa97090eae2c42cd51128e,ca1160cd06656736dc36f8fa4185805b60efdcb64296cfea4918d7810c078997,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-2042452c7d9cbe93,tla-b2b282201d113a51,Standard_Time_Lapses/2025-10-22.0540.BallpointPen.Ink.Paper.9x12.mp4,2025-10-22,05:40,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1044.DNG,1044,front,IMG_1045.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B020-BACK-03 paired-back review,"owner-confirmed consecutive back; back inscription: 98; 5:40 AM ET; Wednesday; October 22, 2025",aa7c67b5ad5fd8489962748a3dd2f299ed4df9e4a29caabf2d2413be742c4422,24f1412421cb093664b9bb850636601c6b61ff14ed0fb16780ed6c60ff67ab2c,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-533f221c135c9311,tla-0ecfd88ad1f42dab,Standard_Time_Lapses/2025-10-23.1041.Pencil.Graphite.FountainPen.Ink.Paper.9x12.mp4,2025-10-23,10:41,9x12,Pencil;FountainPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1046.DNG,1046,front,IMG_1047.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B020-BACK-04 paired-back review,"owner-confirmed consecutive back; back inscription: 99; 10:41 AM ET; Thursday; October 23, 2025",592459c491d3f7cb56a4f6da130589d87dd702ce83eb9becb343cdc32cbe7a38,dee8efcf061d065b2f1899cd6aad3a906384e846f8646459eff735b9b2def430,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
-tlar-13d1ae18a80b2c95,tla-dfecfc6e010ca60e,Standard_Time_Lapses/2025-10-26.1135.Ballpoint.Pen.Ink.Paper.9x12.mp4,2025-10-26,11:35,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1049.DNG,1049,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,no_paired_image_in_current_ledger,owner_confirmed_record_link,owner-confirmed-front-link;back-unavailable;playback-corroborated,owner approved B025-BACK-04 paired-back review,no back photograph supplied; IMG_1050 is a separate owner-confirmed front and is context only,2f3911e004034a491c426b3970bad62a591db99ec0a1eb2f27fb570a67d9a13b,,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
-tlar-dd4ebf763866d451,tla-1a0cbe9cc6ec9b0e,Standard_Time_Lapses/2025-10-22.2328.Pencil.Graphite.BallpointPen.Ink.Paper.9x12.mp4,2025-10-22,23:28,9x12,Pencil;BallpointPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1050.DNG,1050,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_unresolved,owner_confirmed_record_link,owner-confirmed-front-link;back-unresolved;metadata-correction-candidate,owner-confirmed visual identity,no safe back assignment because prior sequence inference paired two confirmed fronts,6439c7c7ab61756ff8f9a98a0dcb0686d77e8000d0c8b031490fc173416631a4,,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
+tlar-13d1ae18a80b2c95,tla-dfecfc6e010ca60e,Standard_Time_Lapses/2025-10-26.1135.Ballpoint.Pen.Ink.Paper.9x12.mp4,2025-10-26,11:35,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1049.DNG,1049,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,no_paired_image_in_current_ledger,owner_confirmed_record_link,owner-confirmed-front-link;back-unavailable;playback-corroborated,owner approved B025-BACK-04 paired-back review,no back photograph supplied; IMG_1050 is a separate owner-confirmed front and is context only,2f3911e004034a491c426b3970bad62a591db99ec0a1eb2f27fb570a67d9a13b,,front=verified_from_local_source_ledger;paired=not_available_in_current_source_ledgers,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
+tlar-dd4ebf763866d451,tla-1a0cbe9cc6ec9b0e,Standard_Time_Lapses/2025-10-22.2328.Pencil.Graphite.BallpointPen.Ink.Paper.9x12.mp4,2025-10-22,23:28,9x12,Pencil;BallpointPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1050.DNG,1050,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_unresolved,owner_confirmed_record_link,owner-confirmed-front-link;back-unresolved;metadata-correction-candidate,owner-confirmed visual identity,no safe back assignment because prior sequence inference paired two confirmed fronts,6439c7c7ab61756ff8f9a98a0dcb0686d77e8000d0c8b031490fc173416631a4,,front=verified_from_local_source_ledger;paired=not_available_in_current_source_ledgers,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-a130977b5b9d7e0b,tla-3edd62a82dcda0cc,Standard_Time_Lapses/2025-10-26.0155.Pencil.Graphite.FountainPen.Ink.Paper.12x9.mp4,2025-10-26,01:55,12x9,Pencil;FountainPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1051.DNG,1051,artwork-side-a,IMG_1052.DNG,two_sided_work_reference,physical_side_a,owner_confirmed_record_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_filename_present_relationship_qualified_in_evidence,owner_confirmed_record_link,owner-confirmed-artwork-side-link;opposite-side-unresolved;playback-corroborated,owner approved B022-BACK-02 paired-back review,owner-approved sequence relationship; IMG_1052 is a distinct artwork side with no canonical proposal,c8b9d36171ea0564cba7685dbd7ecbe681b3d13b865180b3ae2d96ca5df3ba21,3b15e122caf1f83d2edf452e5163950981cadc54cbbd41b4d134042fa474e281,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,two_sided_work_analysis_not_assumed_same_visual_surface,A physical side or reverse relationship is preserved; visual-surface equivalence is not assumed.
 tlar-412e260f43591def,tla-08b7a2ce5e0ccf7f,Standard_Time_Lapses/2025-10-26.0628.Pencil.Graphite.BallpointPen.Ink.Paper.12x9.mp4,2025-10-26,06:28,12x9,Pencil;BallpointPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1053.DNG,1053,front,IMG_1054.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B022-BACK-03 paired-back review,"owner-confirmed consecutive back; back inscription: 101 (sketch); 6:28 AM ET; Sunday; October 26, 2025",6ec2c5f9b34d4df382c1c4d9f9b720e6d1aeedc2cc1858430191aa64f3e225b0,64c2ec802fd5ff08c871829b41691d4d1b79205644daed1a80ae78cdbc424610,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-3a1bd373df4c6f50,tla-96f7598e9391abf3,Standard_Time_Lapses/2025-10-26.1600.Pencil.Graphite.FountainPen.Ink.Paper.12x9.mp4,2025-10-26,16:00,12x9,Pencil;FountainPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1056.DNG,1056,front,IMG_1057.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B022-BACK-04 paired-back review,"owner-confirmed consecutive back; back inscription: 102; 4:00 PM ET; Sunday; October 26, 2025",9f4ac5c82b0ed19f647c08f4d19eda585167c83666c26a7a121a1e2a419a6f98,1ae542ddf54b628ce41fa9862cdbc64af00f6542444478881cd466039398a235,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
@@ -145,7 +145,7 @@ tlar-7cc3026971ecfd9d,tla-cf4c4f44b8e57982,Standard_Time_Lapses/2025-12-06.2001.
 tlar-6d21c54ca79938b9,tla-da910d6208df2b28,Standard_Time_Lapses/2025-12-07.2240.Pencil.Graphite.BallpointPen.Ink.Paper.12x9.mp4,2025-12-07,22:40,12x9,Pencil;BallpointPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1150.DNG,1150,front,IMG_1151.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B032-BACK-01 paired-back review,"owner-confirmed consecutive back; back inscription: 135; 10:40 PM ET; Sunday; December 7, 2025",de092d60c20283a53c6624262220c4abcf0ec796017c6f2c99adf90e0a2a1938,89bfe4fcaeb006c196f5abd7e9b6ad18995e759522ba65899ccb30f412c33fc5,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-43f3151f2207fafd,tla-514d05bf1ac38ee5,Standard_Time_Lapses/2025-12-10.0127.Pencil.Graphite.BallpointPen.Ink.Paper.12x9.mp4,2025-12-10,01:27,12x9,Pencil;BallpointPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1154.DNG,1154,front,IMG_1155.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B032-BACK-02 paired-back review,"owner-confirmed consecutive back; back inscription: 137; Wednesday; 1:27 AM ET; December 10, 2025",c2bf8f74d3560776c071c70bce4ad2d9b2c807666a3313ffad533ec0b2a32899,a1f530be7b0fe71a6bd955e29c73c26e41276e18c3332f4ff812c2e3612e1f24,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-1c9af40361cab409,tla-b823ff4d628bba62,Standard_Time_Lapses/2025-12-10.1003.BallpointPen.Ink.Paper.9x12.mp4,2025-12-10,10:03,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1156.DNG,1156,front,IMG_1157.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B032-BACK-03 paired-back review,"owner-confirmed consecutive back; back inscription: 138 (?); 10:03 AM ET; Wednesday; December 10, 2025",5481b6763aab1aea76941b45f26ac29f7e17f6b67f98c0750c9223a3b0ae9839,c12b1d71830d03e77d7fcd1e188da8a628d37646c6f8ea03dd96f2a5cd2af651,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
-tlar-2f1c985e929bda8c,tla-708525ae36149bd8,Standard_Time_Lapses/2025-12-11.0520.BallpointPen.Ink.Paper.9x12.mp4,2025-12-11,05:20,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1158.DNG,1158,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,no_paired_image_in_current_ledger,owner_confirmed_record_link,owner-confirmed-front-link;playback-corroborated;back-absent-from-supplied-zip,owner-confirmed visual identity; R001-12 decision=1 after pinned three-frame review,no paired back is present in the supplied ZIP; pairing proposal marks the back as missing,d872720a515affab3e16e68d0f94e2573383092dfc4bbf6a9557a35b7df775ef,,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
+tlar-2f1c985e929bda8c,tla-708525ae36149bd8,Standard_Time_Lapses/2025-12-11.0520.BallpointPen.Ink.Paper.9x12.mp4,2025-12-11,05:20,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1158.DNG,1158,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,no_paired_image_in_current_ledger,owner_confirmed_record_link,owner-confirmed-front-link;playback-corroborated;back-absent-from-supplied-zip,owner-confirmed visual identity; R001-12 decision=1 after pinned three-frame review,no paired back is present in the supplied ZIP; pairing proposal marks the back as missing,d872720a515affab3e16e68d0f94e2573383092dfc4bbf6a9557a35b7df775ef,,front=verified_from_local_source_ledger;paired=not_available_in_current_source_ledgers,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-53e72c76ef89d20a,tla-287582c7cefeca6e,Standard_Time_Lapses/2025-12-11.2233.BallpointPen.Ink.FountainPen.Ink.Paper.9x12.mp4,2025-12-11,22:33,9x12,BallpointPen;FountainPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1160.DNG,1160,front,IMG_1161.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B032-BACK-04 paired-back review,"owner-confirmed consecutive back; back inscription: 139; 10:33 PM ET; Thursday; December 11, 2025",d4c35797e5026da4aa04deb96420f32dfa4f7922bea1efff3cf83dee48690761,243f87f278e44149d48415585f7c8f5f6ac083d2b8002ebb955d62aaeaba39fa,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-94f05e6805076b47,tla-dfe8bb22a7ef78fb,Standard_Time_Lapses/2025-12-12.2051.Pencil.Graphite.FountainPen.Ink.Paper.9x12.mp4,2025-12-12,20:51,9x12,Pencil;FountainPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1164.DNG,1164,front,IMG_1165.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B033-BACK-01 paired-back review,"owner-confirmed consecutive back; back inscription: 140; 8:51 PM ET; Friday; December 12, 2025",492c60a866074fb73a83c4701cf463846456d3e274fd28b2bb0c0e36c8c8f97b,a042473c3ca84229c9612be981ed3e0a47ef6984763f2412b2f0f8a5ca116edf,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-98daf44368d6d8ac,tla-ffff4ff7440b3ca6,Standard_Time_Lapses/2025-12-13.0903.Pencil.Graphite.BallpointPen.Ink.Paper.9x12.mp4,2025-12-13,09:03,9x12,Pencil;BallpointPen,Graphite;Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1166.DNG,1166,front,IMG_1167.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B033-BACK-02 paired-back review,"owner-confirmed consecutive back; back inscription: 141; 9:03 AM ET; Saturday; December 13, 2025",744ede4fc21fe0549c622666d39bd842a47272c8aa9316ca666d8318affbe134,c5a8cf28de3ec0b0ff44ec4386e855b7f11fcc554fcbfb4330b94eb27a56b939,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
@@ -231,15 +231,15 @@ tlar-ed03e36428073f71,tla-95f3967be55e9954,Standard_Time_Lapses/2026-02-12.1029.
 tlar-992a4ec5e0ab2596,tla-d76a303d6a16e38d,Standard_Time_Lapses/2026-02-13.1928.BallpointPen.Ink.Paper.12x9.mp4,2026-02-13,19:28,12x9,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1374.DNG,1374,front,IMG_1375.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated;drawn-reverse-not-collapsed,owner approved B053-BACK-02 paired-back review,"owner-confirmed consecutive back; drawn reverse with no. 204 note inscription: 204; 7:28 PM ET Friday February 13, 2026; drawn reverse contains an earlier stage",4a438a6e68de6290fa9e935eb3d50122b11b28c2fce59768e41b5cf66e8f8519,487c6d566681cdea8d6844600222df20fefbdcd1f8b73d87217241c047fde543,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-fd19e3d93b9c7ea3,tla-823f6ba2f40282dc,Standard_Time_Lapses/2026-02-05.1500.BallpointPen.Ink.Paper.9x12.mp4,2026-02-05,15:00,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1378.DNG,1378,front,IMG_1379.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_filename_present_relationship_qualified_in_evidence,owner_confirmed_record_link,owner-confirmed-front-link;playback-corroborated;back-provisional-boundary-review,owner-confirmed visual identity; R002-03 decision=1 after pinned three-frame review,provisional paired back IMG_1379.DNG; medium-provisional; boundary dependency GAP-1349,d57b12ffa0e64cba8a1c7e1b910065822c1e57fc5efae744578e031dd06b2958,09e0335182d416a7f776418027f59719bd5ef0d8fb40204994f962d1071bad28,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-7df92f83c222be09,tla-82ef6acd680054d2,Standard_Time_Lapses/2026-02-15.1908.BallpointPen.Ink.Paper.12x9.mp4,2026-02-15,19:08,12x9,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1380.DNG,1380,front,IMG_1381.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B004-BACK-04 paired-back review,owner-confirmed consecutive back; inscription: 205; Part 1 6:52 AM ET 2/15/2026; Part 2 7:08 PM ET 2/15/2026,e9f285dfc2bc8b40d6efbb37c3f3ab6a87c0ea133fb285c7ca0c1b5c91e3135e,ea05177d56aad633604f354b279b8834f6161204cc849a9048300a00cb957694,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
-tlar-1a29557234500c2a,tla-95c121dd73329673,Standard_Time_Lapses/2026-02-25.1122.BallpointPen.Ink.Paper.9x12.mp4,2026-02-25,11:22,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1382.DNG,1382,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_unresolved,owner_confirmed_record_link,owner-confirmed-front-link;back-unresolved,owner-confirmed visual identity; B002 decision=1,not assessed in visual match batch,32fe4140a71e8a4c9384893825b940ef5042b2c683e066b900c2357d6a5cfff7,,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
-tlar-c0555cf3d60eef5a,tla-e4ba9213baa6772d,Standard_Time_Lapses/2026-02-27.0802.BallpointPen.Ink.Paper.9x12.mp4,2026-02-27,08:02,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1384.DNG,1384,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_unresolved,owner_confirmed_record_link,owner-confirmed-front-link;back-unresolved,owner-confirmed visual identity; batch 001 decision=1,not assessed in visual match batch,105c76e6e55dcdc610168c33e0bc854ee8f6d2d08acb39b1be00f5ecc686c1a1,,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
+tlar-1a29557234500c2a,tla-95c121dd73329673,Standard_Time_Lapses/2026-02-25.1122.BallpointPen.Ink.Paper.9x12.mp4,2026-02-25,11:22,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1382.DNG,1382,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_unresolved,owner_confirmed_record_link,owner-confirmed-front-link;back-unresolved,owner-confirmed visual identity; B002 decision=1,not assessed in visual match batch,32fe4140a71e8a4c9384893825b940ef5042b2c683e066b900c2357d6a5cfff7,,front=verified_from_local_source_ledger;paired=not_available_in_current_source_ledgers,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
+tlar-c0555cf3d60eef5a,tla-e4ba9213baa6772d,Standard_Time_Lapses/2026-02-27.0802.BallpointPen.Ink.Paper.9x12.mp4,2026-02-27,08:02,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1384.DNG,1384,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_unresolved,owner_confirmed_record_link,owner-confirmed-front-link;back-unresolved,owner-confirmed visual identity; batch 001 decision=1,not assessed in visual match batch,105c76e6e55dcdc610168c33e0bc854ee8f6d2d08acb39b1be00f5ecc686c1a1,,front=verified_from_local_source_ledger;paired=not_available_in_current_source_ledgers,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-63397cd208980809,tla-bf615e09154229a7,Standard_Time_Lapses/2026-02-28.1452.BallpointPen.Ink.Paper.9x12.mp4,2026-02-28,14:52,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1388.DNG,1388,front,IMG_1389.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B053-BACK-03 paired-back review,"owner-confirmed consecutive back; back inscription: 208; 2:52 PM ET Saturday February 28, 2026",42566daf32d33b758a41e71e9796c66e5d66991a372835b9dec775b9f6bc1e55,254bae1cf4a8985f5e974457cea769060fc568e98362e7353b396a779e986f7b,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-f5013fb056547acc,tla-da1d6bbba06ddd5d,Standard_Time_Lapses/2026-02-28.1937.BallpointPen.Ink.Paper.12x9.mp4,2026-02-28,19:37,12x9,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1390.DNG,1390,front,IMG_1391.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B053-BACK-04 paired-back review,"owner-confirmed consecutive back; back inscription: 209; 7:37 PM ET Saturday February 28, 2026",3821bc76f4fbc59c516873d638a75c8f9df02228a9ece1913dc4324fffe2af1c,18439494761c5a9572815c07827c9feb0186ff784cabbf7a70bc19d16aabf8c7,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-e1dcdf92086a790a,tla-68b9b8f4e4aa154b,Standard_Time_Lapses/2026-03-01.0918.BallpointPen.Ink.Paper.12x9.mp4,2026-03-01,09:18,12x9,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1392.DNG,1392,front,IMG_1393.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated;second-session-and-sketch-notes-preserved,owner approved B054-BACK-01 paired-back review,"owner-confirmed consecutive back; back inscription: 210; 9:18 AM ET Sunday March 1, 2026; marked '2nd session'; separate sketch note also present",cd151e3f553a06cba54f2f7d365bb8e2cc17123ea190f39e8e51d4d5205fd19a,2c2cdc618d165bdd1c544241dc77ab7ea2808368fbdc1d7ba4d3c27a0eaa3801,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-6c20f6651b4c0637,tla-7f5baf7bf10406f5,Standard_Time_Lapses/2026-03-01.2312.BallpointPen.Ink.Paper.9x12.mp4,2026-03-01,23:12,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1394.DNG,1394,front,IMG_1395.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated;earlier-sketch-stage-preserved;drawn-reverse-not-collapsed,owner approved B054-BACK-02 paired-back review,"owner-confirmed consecutive back; drawn reverse with notes for both sides inscription: 211; 11:12 PM ET Sunday March 1, 2026; drawn reverse also contains an earlier no. 211 sketch note",63fa3ea5e6c094c0f8f3110bf672ba8ded038ba23ba0d53f9079054938fd6a73,fd93b01fbc207fb5c828c4b43a1f30c2a13a16359f26b0b5bb3e231aafd047fb,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
-tlar-59cacee4e73aa89d,tla-a182c3491f07e3be,Standard_Time_Lapses/2026-03-02.0903.BallpointPen.Ink.Paper.9x12.mp4,2026-03-02,09:03,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1396.DNG,1396,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_unresolved,owner_confirmed_record_link,owner-confirmed-front-link;back-unresolved,owner-confirmed visual identity; B003R-01 decision=1,not assessed in visual match batch,9b4f7bc2eaef4382cb724d5ef5a604189b01a89e5394c6a493bd98e77c3b2ef5,,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
+tlar-59cacee4e73aa89d,tla-a182c3491f07e3be,Standard_Time_Lapses/2026-03-02.0903.BallpointPen.Ink.Paper.9x12.mp4,2026-03-02,09:03,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1396.DNG,1396,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_unresolved,owner_confirmed_record_link,owner-confirmed-front-link;back-unresolved,owner-confirmed visual identity; B003R-01 decision=1,not assessed in visual match batch,9b4f7bc2eaef4382cb724d5ef5a604189b01a89e5394c6a493bd98e77c3b2ef5,,front=verified_from_local_source_ledger;paired=not_available_in_current_source_ledgers,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-aa5caf74685252ad,tla-8941c7cfd50503bf,Standard_Time_Lapses/2026-03-02.2127.BallpointPen.Ink.Paper.9x12.mp4,2026-03-02,21:27,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1398.DNG,1398,front,IMG_1399.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated;same-number-session-disambiguated,owner approved B054-BACK-03 paired-back review,"owner-confirmed consecutive back; back inscription: 212; 9:27 PM ET Monday March 2, 2026",ed352c7e2af2ca30981fb2e31531819adce988242f497851f1a4b32dad7200c8,6c886eaaec37264e5a883b531b410c2da0f10d8f65a6c42bcca58db605e43b42,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
-tlar-d855108ab1200e88,tla-5089247d4f579c6b,Standard_Time_Lapses/2026-03-02.2331.BallpointPen.Ink.Paper.9x12.mp4,2026-03-02,23:31,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1400.DNG,1400,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_unresolved,owner_confirmed_record_link,owner-confirmed-front-link;back-unresolved,owner-confirmed visual identity; B003R-05 decision=1,not assessed in visual match batch,911edf2f81b48d0c370f5f9ee2ddcacf1ddffb982a7b61d331bc0f74095e2b4f,,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
+tlar-d855108ab1200e88,tla-5089247d4f579c6b,Standard_Time_Lapses/2026-03-02.2331.BallpointPen.Ink.Paper.9x12.mp4,2026-03-02,23:31,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1400.DNG,1400,front,,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_unresolved,owner_confirmed_record_link,owner-confirmed-front-link;back-unresolved,owner-confirmed visual identity; B003R-05 decision=1,not assessed in visual match batch,911edf2f81b48d0c370f5f9ee2ddcacf1ddffb982a7b61d331bc0f74095e2b4f,,front=verified_from_local_source_ledger;paired=not_available_in_current_source_ledgers,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-483b2750c9d9e2f8,tla-389e052869e1b801,Standard_Time_Lapses/2026-03-03.1935.BallpointPen.Ink.Paper.9x12.mp4,2026-03-03,19:35,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1402.DNG,1402,front,IMG_1403.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated;same-number-session-disambiguated;drawn-reverse-not-collapsed,owner approved B054-BACK-04 paired-back review,"owner-confirmed consecutive back; drawn reverse with no. 213 note inscription: 213; 7:35 PM ET Tuesday March 3, 2026; drawn reverse contains a separate sketch",0d5e120cdd6e3e2119de9745059b76f59de6d04da12b9dfcd0f8943967bc9b2d,3514a4210b22dd9ce3f44a233f5f98361a81bc91a389d21b3d21be7473f6fe25,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-41caf4d503440765,tla-bc4ec625d47cb3ed,Standard_Time_Lapses/2026-03-04.1421.BallpointPen.Ink.Paper.9x12.mp4,2026-03-04,14:21,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1404.DNG,1404,front,IMG_1405.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;timestamp-and-playback-corroborated,owner approved B055-BACK-01 paired-back review,"owner-confirmed consecutive back; back inscription: 214; 2:21 PM ET Wednesday March 4, 2026",f151bb65ef15a560677da5cfb48550d82f4ffc64e4e3baf1c97b72302c54b0db,1e5fd5edc8f91336b6332fe5e5fab11718e1ce4abbeed9309abaf339aeb526e5,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.
 tlar-78a87b60ef02f9e0,tla-2c38711267c795e8,Standard_Time_Lapses/2026-04-04.1649.BallpointPen.Ink.Paper.9x12.mp4,2026-04-04,16:49,9x12,BallpointPen,Ink,Paper,ba7e7903901767f2d5a4367d7ae22c2546366d6d,IMG_1406.DNG,1406,front,IMG_1407.DNG,owner_confirmed_record_reference,front_surface,owner_confirmed_relationship_temporal_endpoint_not_separately_encoded,not_asserted_by_derived_layer,paired_reference_confirmed,owner_confirmed_record_link,owner-confirmed-front-link;owner-confirmed-back-link;playback-corroborated;same-number-session-disambiguated;canonical-date-conflict-preserved;drawn-reverse-not-collapsed,owner approved B055-BACK-02 paired-back review,"owner-confirmed consecutive back; recorded blue side with note; drawn reverse inscription: 215 sketch; 4:49 PM ET Wednesday March 4, 2026; drawn reverse contains a separate black construction drawing and another partially legible note",e7aca3eeedad9dfc372f3aa82c73c12d5af784178e82f431c443da2dacca82f9,aabd7ee0d0153b6bc10451c5d2c3832f8fa05eb933feb418fa3faa7887b60c52,front_and_paired_hashes_verified,front_back_archive_zip,local_evidence_only_not_bundled_v0.1,,,record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed,Record link is confirmed; exact temporal endpoint equivalence is not independently encoded here.

README.md

@@ -8,7 +8,6 @@ source_datasets:
 size_categories:
 - n<1K
 task_categories:
-- video-classification
 - feature-extraction
 tags:
 - drawing
@@ -293,6 +292,13 @@ Pre-Standard recordings. Every published video has a persistent record ID,
 content hash, byte size, and encoded-stream metadata; historical session and
 provenance fields remain less complete in the Pre-Standard tier.
 
+**Unit of record:** each active metadata row identifies one published MP4
+video object. A row does not necessarily represent one drawing, one
+uninterrupted session, or a complete start-to-finish process. When documented,
+fragment-sequence and physical-reference relationships remain in separate
+revision-pinned sidecars joined by `record_id`; absent relationships remain
+unknown.
+
 **[Browse the Standard recordings](https://maxwellinked.github.io/time-lapse-artifacts/)**
 through a searchable public browser with muted motion previews. The browser is
 a dynamic presentation layer and may lag the current Hugging Face dataset.
@@ -311,40 +317,9 @@ release.
 
 ## Snapshot and Coverage
 
-These counts describe the active construction state represented by this
-revision. The immutable `v0.3.0` tag
-contains 467 rows: 338 Standard and 129 Pre-Standard. A later curator-verified
-provenance correction promoted one distinct Standard recording from the
-noncanonical unresolved subtree. A subsequent creator-verified ingestion added
-17 unique Standard media objects. A subsequent creator-verified tier review
-promoted the clean July 13 recording without changing its payload or stable
-identity, bringing the prior `main` state to 357 Standard and 128 Pre-Standard
-records. The next ingestion added three creator-verified August 2026 Standard
-recordings, including the first 14 × 17 in record and the first member of a
-recording sequence for which `Rec02` remains expected. A later update added the
-first two recordings in a separate August 22 14 × 17 in sequence. This update
-extends that sequence through the creator-supplied `Rec03`; no drawing or
-sequence endpoint is inferred from the suffix alone.
-A later creator-confirmed filename correction preserves the complete
-`Rec01`–`Rec15` order of 15 existing 30 × 40 in recordings dated June 18–30.
-Their media payloads, stable IDs, hashes, metadata membership, and release
-counts are unchanged.
-The August 24–27 fragment-sequence ingestion adds 22 unchanged canonical
-Framelapse recordings across five creator-confirmed complete sequences. Five
-unchanged InShot outputs remain noncanonical derivatives in a nested provenance
-directory and are excluded from the active indexes and Viewer. A separate
-27-row, 15-field relationship sidecar records grouping, order, completeness,
-and derivative coverage. This active-construction update does not create a new
-version tag, change the 29-field video schema or acquisition-protocol
-identifier, backfill historical records, or introduce a global `work_id`.
-The August 28–29 fragment-sequence ingestion adds 19 unchanged canonical
-Framelapse recordings across four creator-confirmed complete sequences. A new
-19-row, 15-field dated relationship sidecar records grouping, order, and
-completeness; no derivative is included. This addition preserves the same
-29-field schema and `standard-2025-07-13` acquisition-protocol identifier.
-Two records from the 17-object ingestion and the promoted July 13 record are
-explicitly documented as shortened derivatives rather than full-duration
-masters.
+The table below describes this revision. Batch-level history is maintained in
+[`CHANGELOG.md`](CHANGELOG.md). The immutable `v0.3.0` tag remains a 467-row
+historical release and does not describe current `main`.
 
 | Collection tier | Published MP4s | Indexed rows | Date coverage | Metadata state |
 | --- | ---: | ---: | --- | --- |
@@ -352,20 +327,6 @@ masters.
 | `pre_standard` | 128 | 128 | 2024-09-17–2025-07-09, plus 9 unknown dates | Complete core technical metadata; historical descriptive and provenance gaps remain |
 | Earlier archive (unpublished) | 0 public videos | 0 | Historical scope 2012–2016 | More than 8 TB held outside this release; ingestion pending |
 
-**Current indexed state:** this revision contains 532 rows: 404 Standard and
-128 Pre-Standard. The preceding v0.1 state at revision
-`339e6149de130cbe2d001f7a0e5247872bc788ec` exposed 465 rows: 335 Standard and
-130 Pre-Standard. v0.2 added three previously unindexed Standard files and
-removed one Pre-Standard row whose media did not meet the ownership and
-provenance threshold. v0.3 added stable Pre-Standard identities and technical
-metadata. The post-v0.3 provenance correction promotes one previously
-unresolved, distinct Standard recording and corrects a separate record's
-physical finish date and time. The later 17-record Standard ingestion applies
-technical and provenance criteria without filtering records by aesthetic
-completion or perceived artistic quality. The later July 13 promotion applies
-the same rule to a clean shortened record and moves the documented Standard
-boundary coherently rather than creating a one-file exception.
-
 The Hub configurations use the split name `archive`. No official
 train/validation/test partition has been defined.
 
@@ -441,10 +402,8 @@ It is not part of the canonical record set.
 `2026-07-31/` preserves the completed provenance release, including mappings
 between historical `Series_9x12` filenames and canonical records. The former
 full duplicate video snapshot is not retained. Relationships are preserved
-through mappings, hashes, metadata, and repository history.
-
-`Unresolved_Series_9x12/` contains distinct historical recordings that do not
-yet have enough documentation for promotion into the canonical collection.
+through mappings, hashes, metadata, and repository history. See the
+[provenance navigation index](Standard_Time_Lapses/Provenance/README.md).
 
 ### `Pre_Standard_Time_Lapses/`
 
@@ -554,12 +513,7 @@ that boundary may reflect capture conditions as well as practice development.
 Session-level descriptive and provenance metadata are curated by the creator
 from the physical practice, filenames, file properties, and retained historical
 evidence. This is the scope of `annotations_creators: expert-generated`; it does
-not mean that frame-level task labels exist. Likewise, `language: en` describes
-the filename vocabulary, metadata, and documentation, not incidental audio.
-
-The `video-classification` task facet refers to possible session-level targets
-such as documented tool, medium, and support. The release does not define label
-encodings, an official benchmark, or train/validation/test partitions.
+not mean that frame-level task labels exist.
 
 The videos themselves are primarily raw and unannotated. The release does not
 provide:
@@ -742,25 +696,16 @@ See `CHANGELOG.md` for release-level changes.
 - `SCHEMA.md` — filename and metadata contracts
 - `Archive_Specifications.md` — acquisition specifications and known gaps
 - `VALIDATION.md` — validation scope and current results
+- `VIEWER_MIGRATION.md` — current Viewer configuration and verification
+  invariants
 - `RELEASE_MANIFEST.json` — historical v0.2.0 release-candidate manifest; it
   does not describe current `main` or provide checksums for the video payloads
-- `tools/capture_hub_inventory.py` — pinned Hub/Xet identity inventory
-- `tools/test_inventory_binding.py` — self-contained revision/metadata-binding
-  regression tests
-- `tools/download_verified.py` — selected download and byte-integrity check
-- `tools/enrich_prestandard.py` — pinned Pre-Standard technical enrichment
-- `tools/validate_metadata.py` — cross-tier metadata and repository checks
-- `tools/validate_fragment_relationships.py` — dated sequence and derivative
-  relationship checks against the pinned inventory
-- `Standard_Time_Lapses/Provenance/` — historical evidence and mappings
-- `Standard_Time_Lapses/Provenance/2026-08-27/fragment_sequence_relationships.csv`
-  — dated fragment-sequence and noncanonical-derivative relationship sidecar
-- `Standard_Time_Lapses/Provenance/2026-08-27/README.md` — scope, identity,
-  exclusion, and revision-binding notes for the dated sidecar
-- `Standard_Time_Lapses/Provenance/2026-08-29/fragment_sequence_relationships.csv`
-  — dated canonical fragment-sequence relationship sidecar
-- `Standard_Time_Lapses/Provenance/2026-08-29/README.md` — scope, filename
-  uncertainty, timing boundary, and revision-binding notes for the dated sidecar
+- `tools/` — inventory capture, verified download, enrichment, and validation
+  helpers
+- `Standard_Time_Lapses/Provenance/` — historical evidence and dated
+  fragment-sequence relationships
+- `Physical_References/` — physical-reference relationship schema, manifest,
+  and sidecar
 
 ## Citation
 

SCHEMA.md

@@ -1,8 +1,8 @@
 # Schema
 
-This document defines the contracts for canonical filenames and
-`metadata.csv`. Filenames are human-readable descriptions; `record_id` is the
-persistent machine identity.
+This document defines canonical filenames, the active video-object indexes,
+and their relationship sidecars. Filenames are human-readable descriptions;
+`record_id` is the persistent identity of one published video object.
 
 ## Canonical Filename Format
 
@@ -58,10 +58,14 @@ therefore preserve tool and medium sets without manufacturing positional pairs.
 directly in `Standard_Time_Lapses/`. Direct placement alone does not make a file
 canonical: every released canonical file must have exactly one metadata row,
 complete required technical fields, and the necessary rights and provenance
-clearance. The active-construction candidate contains 404 records. Before
-publication, it must cover every MP4 stored directly in
+clearance. Before publication, it must cover every MP4 stored directly in
 `Standard_Time_Lapses/` at the exact reviewed revision.
 
+Each metadata row represents one MP4 video object. It does not assert one
+drawing, one session, or one complete process. Documented relationships among
+multiple video objects remain in sidecars and do not merge or replace their
+`record_id` values.
+
 The canonical index does not make provenance, unresolved, pre-standard, or
 legacy files canonical.
 
@@ -73,7 +77,7 @@ legacy files canonical.
 | `record_id` | string | Persistent identity in the form `tla-` plus 16 lowercase hexadecimal characters. |
 | `collection_tier` | enum | `standard` for this index. |
 | `is_canonical` | boolean | `true` for every row in this index. |
-| `acquisition_protocol_version` | string | Protocol identifier; currently `standard-2025-07-13`. |
+| `acquisition_protocol_version` | string | Protocol identifier; Standard rows use `standard-2025-07-13`. |
 
 The initial `record_id` values were generated from a namespaced SHA-256 of the
 published repository path. Once assigned, the stored value is authoritative and
@@ -85,7 +89,7 @@ different object at the corrected destination path.
 
 ### Pre-Standard collection contract
 
-`Pre_Standard_Time_Lapses/metadata.csv` indexes the 128 direct MP4 files in that
+`Pre_Standard_Time_Lapses/metadata.csv` indexes the direct MP4 files in that
 folder. Each row uses `collection_tier = pre_standard`, `is_canonical = false`,
 and a blank `acquisition_protocol_version`. Pre-Standard status records a
 different acquisition/documentation era; it does not remove the requirements
@@ -158,7 +162,7 @@ representative and its limitation is disclosed in `notes`.
 | `notes` | string or blank | Human-readable evidence or qualification. |
 
 Blank provenance values mean that the field is not documented or not
-applicable in the current release. A blank must not be promoted to a verified
+applicable in the active indexes. A blank must not be promoted to a verified
 relationship.
 
 Observed provenance statuses include:
@@ -168,6 +172,7 @@ Observed provenance statuses include:
 - `legacy_duplicate_removed`
 - `legacy_candidates_rejected`
 - `direct_root_upload`
+- `tier_promotion_verified`
 
 Observed evidence methods include:
 
@@ -185,11 +190,8 @@ New enumerated values must be documented here before use.
 Each dated
 `Standard_Time_Lapses/Provenance/YYYY-MM-DD/fragment_sequence_relationships.csv`
 is a derived relationship table with one row per reviewed media object in that
-ingestion. The 2026-08-27 instance has 27 rows: 22 canonical Framelapse
-fragments across five owner-confirmed complete sequences and five noncanonical
-InShot derivatives. The 2026-08-29 instance has 19 canonical Framelapse
-fragments across four owner-confirmed complete sequences and no derivatives.
-Neither adds fields to either 29-field video index.
+ingestion. A dated instance may contain canonical fragments and noncanonical
+derivatives. It adds no fields to either 29-field video index.
 
 | Field | Type | Meaning |
 | --- | --- | --- |
@@ -202,7 +204,7 @@ Neither adds fields to either 29-field video index.
 | `size_bytes` | integer | Exact object size in bytes. |
 | `sequence_position` | integer or blank | Contiguous one-based position for a canonical fragment. |
 | `sequence_count` | integer or blank | Total canonical fragment count for the sequence. |
-| `sequence_completeness` | enum | Owner-reviewed completeness of the underlying canonical source sequence; all dated rows use `owner_confirmed_complete`, while `derivative_coverage` separately states whether a derivative covers all of that sequence. |
+| `sequence_completeness` | enum | Owner-reviewed completeness of the underlying canonical source sequence; `owner_confirmed_complete` means the owner confirmed that source sequence complete. Derivative coverage remains separate. |
 | `source_record_ids` | semicolon-delimited string or blank | Ordered canonical source IDs for a derivative; blank on canonical rows. |
 | `derivative_coverage` | enum or blank | `complete_sequence` or `partial_sequence` for a derivative; blank on canonical rows. |
 | `evidence_state` | semicolon-delimited string | Only evidence checks actually completed for the object and relationship. |
@@ -242,8 +244,8 @@ video status or duplicate editable video metadata.
 
 Each row has a stable `reference_id`, reviewed photograph filename and role,
 explicit surface and temporal scope, evidence state, hash state, and machine-use
-caution. Blank values mean unknown or not documented. Version 0.1 does not
-bundle the reference photographs, and blank proposed-path fields must not be
+caution. Blank values mean unknown or not documented. Reference-media
+availability must be explicit, and blank proposed-path fields must not be
 interpreted as public media locations.
 
 `longitudinal_continuation` identifies a later or otherwise changed physical
@@ -293,12 +295,6 @@ Before publication, the validator must confirm:
 Run:
 
 ```bash
-python tools/validate_metadata.py metadata.csv
-```
-
-Rebuild the v0.2 index from its pinned 335-row source and audited additions:
-
-```bash
-python tools/repair_metadata.py source_metadata.csv metadata.csv \
-  --additions tools/metadata_additions_v0.2.csv
+python tools/validate_metadata.py metadata.csv \
+  --pre-standard-metadata Pre_Standard_Time_Lapses/metadata.csv
 ```

Standard_Time_Lapses/Provenance/README.md

@@ -0,0 +1,42 @@
+# Standard provenance
+
+This subtree stores supporting historical evidence and relationship tables. It
+is outside both active video indexes and Dataset Viewer configurations; nested
+placement does not make a media object canonical.
+
+Each active metadata row continues to identify one published video object.
+Relationship sidecars can group those objects without merging their persistent
+`record_id` values or asserting undocumented drawing- or session-level facts.
+
+## Dated layers
+
+- [`2026-07-31/`](2026-07-31/) preserves historical filename-to-record mappings
+  and the pre-rebuild metadata snapshot without retaining the former duplicate
+  video snapshot.
+- [`2026-08-27/`](2026-08-27/README.md) documents 22 canonical fragments across
+  five complete source sequences and five noncanonical InShot derivatives.
+- [`2026-08-29/`](2026-08-29/README.md) documents 19 canonical fragments across
+  four complete source sequences and no derivative payloads.
+
+## Documented fragment sequences
+
+These are the nine sets recorded in the two dated relationship sidecars.
+`fragment_set_label` is a descriptive grouping label, not a global `work_id`.
+`owner_confirmed_complete` applies to the canonical source sequence represented
+in that sidecar; it does not establish real drawing time or claim that activity
+outside the retained recordings was captured.
+
+| Sidecar | `fragment_set_label` | Canonical fragments | Positions | `sequence_completeness` |
+| --- | --- | ---: | --- | --- |
+| [2026-08-27](2026-08-27/fragment_sequence_relationships.csv) | `2026-08-24.0157.BallpointPen.Ink.Paper.9x12` | 2 | `Rec01`–`Rec02` | `owner_confirmed_complete` |
+| [2026-08-27](2026-08-27/fragment_sequence_relationships.csv) | `2026-08-24.0638.BallpointPen.Ink.Paper.12x9` | 2 | `Rec01`–`Rec02` | `owner_confirmed_complete` |
+| [2026-08-27](2026-08-27/fragment_sequence_relationships.csv) | `2026-08-25.1941.BallpointPen.Ink.Paper.9x12` | 6 | `Rec01`–`Rec06` | `owner_confirmed_complete` |
+| [2026-08-27](2026-08-27/fragment_sequence_relationships.csv) | `2026-08-26.1229.BallpointPen.Ink.Paper.9x12` | 2 | `Rec01`–`Rec02` | `owner_confirmed_complete` |
+| [2026-08-27](2026-08-27/fragment_sequence_relationships.csv) | `2026-08-27.0856.BallpointPen.Ink.Paper.9x12` | 10 | `Rec01`–`Rec10` | `owner_confirmed_complete` |
+| [2026-08-29](2026-08-29/fragment_sequence_relationships.csv) | `2026-08-28.0108.BallpointPen.Ink.Paper.9x12` | 10 | `Rec01`–`Rec10` | `owner_confirmed_complete` |
+| [2026-08-29](2026-08-29/fragment_sequence_relationships.csv) | `2026-08-29.0254.BallpointPen.Ink.Paper.9x12` | 4 | `Rec01`–`Rec04` | `owner_confirmed_complete` |
+| [2026-08-29](2026-08-29/fragment_sequence_relationships.csv) | `2026-08-29.0602.BallpointPen.Ink.Paper.9x12` | 2 | `Rec01`–`Rec02` | `owner_confirmed_complete` |
+| [2026-08-29](2026-08-29/fragment_sequence_relationships.csv) | `2026-08-29.0716.BallpointPen.Ink.Paper.9x12` | 3 | `Rec01`–`Rec03` | `owner_confirmed_complete` |
+
+The dated CSV files remain authoritative for row-level identities, ordering,
+derivative coverage, evidence states, hashes, and pinned source revisions.

VALIDATION.md

@@ -1,268 +1,185 @@
 # Validation Report
 
-## Scope
-
-The current post-v0.3 active-construction candidate validates locally and
-against an immutable pull-request revision:
-
-- all 404 canonical Standard rows and candidate direct Standard MP4 paths
-- all 128 active Pre-Standard rows and direct Pre-Standard MP4 paths
-- persistent record identity and cross-tier uniqueness
-- locally audited byte sizes and technical metadata for the 19 new fragments
-- container-header technical metadata for every active or candidate MP4
-- candidate filename rules, field types, numeric ranges, and stored-orientation
-  consistency
-- a new 19-row, 15-field relationship sidecar covering canonical fragments
-  across four complete sequences, plus regression validation of the frozen
-  27-row August 27 sidecar
-
-One 6,587,685,497-byte provenance object is promoted to the canonical root,
-and the distinct 496,296,535-byte object previously occupying its corrected
-name is moved to its curator-confirmed April 4 path. No video bytes are
-transcoded, replaced, downloaded in full, or newly uploaded. The promoted
-object's properties were read from its public MP4 header using HTTP range
-requests. Sizes and content identities were read from the Hub repository
-inventory.
-
-The later Standard ingestion adds 17 creator-verified media objects totaling
-9,289,459,921 bytes. Every addition was fully decoded before upload, all 17
-local SHA-256 identities are unique, and none matches an existing Hub media
-object. The batch is indexed without changing the 29-field schema.
-
-The July 13 tier promotion moves one existing 141,221,810-byte object from
-Pre-Standard to Standard without changing its payload, Xet identity, or stable
-record ID. All 1,205 video frames and the audio stream decode successfully.
-The clip begins after drawing has started and reaches a completed, signed
-endpoint. The promotion moves the protocol identifier coherently to
-`standard-2025-07-13` and preserves the 485-record total.
-
-The August 2026 Standard ingestion adds three creator-verified media objects
-totaling 50,478,909,746 bytes. All 231,383 video frames and every audio stream
-decode successfully. The batch includes the first 14 × 17 in Standard record,
-retains `Rec01` because `Rec02` is expected, and preserves the
-existing 29-field schema and protocol identifier.
-
-The August 22–23 recording-sequence ingestion adds three creator-verified media
-objects totaling 51,022,796,325 bytes. All 233,723 video frames and every audio
-stream decode. Rec03 produced one end-of-stream non-monotonic DTS warning from
-FFmpeg's null output during combined-stream validation; direct inspection found
-strictly increasing source packet and decoded-frame timestamps at the tail. The
-batch retains literal `Rec01` through `Rec03` sequence suffixes and documents a
-creator-confirmed Rec03 change from Pelikan black to unmarked, unknown-brand
-black ink at approximately `00:04:59`.
-
-The August 24–27 fragment-sequence ingestion adds 22 creator-confirmed,
-unchanged Framelapse source objects totaling 17,389,875,055 bytes and
-3,391.699091 seconds of encoded playback. They represent five complete
-sequences and are stored as landscape video without audio. Five unchanged
-InShot outputs remain nested noncanonical provenance derivatives and are
-excluded from active row, byte, duration, orientation, and audio totals. The
-relationship sidecar records all 27 media objects without changing the
-29-field video schema, `standard-2025-07-13`, or historical rows, and without
-introducing a global `work_id`.
-
-The August 28–29 fragment-sequence ingestion adds 19 creator-confirmed,
-unchanged Framelapse source objects totaling 10,661,404,849 bytes and
-2,089.745536 seconds of encoded playback. They represent four complete
-sequences containing 10, 4, 2, and 3 contiguous recordings. Full packet-stream
-demux passed for 19/19 files and decoded start/middle/end checks passed for
-57/57 samples. All 19 ordinary SHA-256 values are unique. The files are stored
-as landscape HEVC without audio; their literal
-`com.android.capture.fps=5.000000` header value is not used to infer real
-drawing time. No derivative is included.
-
-## Result
-
-**LOCAL STRUCTURAL AND IMMUTABLE-PR PASS — zero validation errors**
+## Scope and publication boundary
+
+This consolidation candidate is based on exact Hub `main` revision
+`62891506283585abc76a68dd044eaed1d55d7ab5`. It does not change any video,
+active metadata row, `record_id`, Xet identity, or acquisition-protocol value.
+It tightens relationship validation, corrects nine mechanically inconsistent
+physical-reference `hash_state` values, and reduces documentation drift.
+
+The candidate has not been published by this report. The active-index receipt
+below binds the unchanged indexes and media to the base revision. Before any
+publication or tag, rerun the same checks against the exact pull-request head
+and confirm the settled Viewer.
+
+## Current-head active-index receipt
+
+**PINNED REMOTE-INVENTORY PASS — zero validation errors**
+
+The repository inventory was captured from the Hub API and immutable resolve
+headers at the base revision. `tools/validate_metadata.py` then checked both
+active indexes against that inventory.
 
 | Check | Result |
 | --- | ---: |
+| Hub base revision | `62891506283585abc76a68dd044eaed1d55d7ab5` |
+| Root `metadata.csv` | 227,640 bytes; SHA-256 `5148753aa9f109996a26b4b60f21a403eba16d96042f795a12511798bb1ed4f0` |
+| Pre-Standard `metadata.csv` | 37,361 bytes; SHA-256 `15de8b2c97a8c463dd279054ab0ce3894caa6602f3b72f8025d32511746c3630` |
 | Active indexed rows | 532 |
-| Canonical Standard rows | 404 |
-| Pre-Standard rows | 128 |
+| Canonical Standard / Pre-Standard | 404 / 128 |
 | Metadata columns per index | 29 |
-| Unique persistent `record_id` values | 532 |
-| Complete encoded-video metadata with remote Xet binding | 532/532 |
-| Stored-orientation conflicts | 0 |
-| Duplicate local SHA-256 values among the 19 new media objects | 0 |
-| New media objects remotely bound by SHA-256, size, and Xet identity | 19/19 |
-| New fragment-sequence relationship rows | 19 |
-| Relationship fields | 15 |
-| New canonical fragments / noncanonical derivatives | 19 / 0 |
-| New owner-confirmed complete sequences | 4 |
-| Inventory-binding regression tests | 5/5 |
-
-**AUGUST 28–29 REMOTE PR INVENTORY AND RELATIONSHIP VALIDATION — PASS**
-
-The media-only PR head `0c421b555a2558887b65b0b25380b35c642fa7e1`
-contained exactly the 19 planned MP4 additions relative to pinned base
-`c5c4da8fa880e39a56a2cfd032c5c87072442fe1`, with zero deletions and zero
-changed existing paths. From that head to metadata-bearing commit
-`429541ae7f93c869056df956873f3441d580914c`, only the root `metadata.csv`
-changed. Its remote receipt matches the local 227,478-byte file at SHA-256
-`0c2994092365566142ed49d41d63ac8083aa2b611709a779ac72106650283d4b`.
-
-Validation at the metadata-bearing commit confirmed 404/404 direct Standard
-paths, 128/128 direct Pre-Standard paths, all 19 new relationship paths,
-ordinary SHA-256 values, byte sizes, Xet identities, and all 19 canonical
-`record_id` joins. The relationship validator reported 19 canonical-fragment
-rows, no derivatives, four owner-confirmed complete sequences, and zero
-errors. The dated sidecar pins that immutable commit and is committed
-afterward to avoid a circular self-reference. Viewer settlement and merge are
-separate gates and are not asserted by this PASS.
-
-**PRIOR AUGUST 24–27 REMOTE PR INVENTORY AND RELATIONSHIP VALIDATION — PASS**
-
-The sidecar's `source_hub_revision` pins the immutable metadata-bearing PR
-commit `8a21015210c19936d3b18175ae3f4061ae1e5d8d`. At that revision, validation
-confirmed 385/385 direct Standard paths, 128/128 direct Pre-Standard paths,
-all 27 relationship paths, ordinary SHA-256 values, byte sizes, Xet identities,
-and all 22 canonical `record_id` joins. The remote root `metadata.csv` receipt
-matches the local 208,651-byte file at SHA-256
-`0de0b9111effa84cd41b13f93e6627b9b94f33f648dd29ded5d4eb8a85c5bfad`.
-The relationship validator reported 27 rows, 22 canonical fragments, five
-noncanonical derivatives, five complete sets, and zero errors.
-
-The media-only PR head `bb4160045cae21a71bf360278549398dc9d2a028`
-contained exactly the 27 planned additions relative to the pinned base, with
-zero deletions or changed existing paths. The metadata-bearing revision has
-exactly the expected 39-path cumulative diff and zero deletions. Viewer
-settlement and merge are separate gates and are not asserted by this PASS.
-
-Both Hub builder configurations explicitly declare the same 29 features. This
-prevents per-CSV inference from representing an integer-only canonical
-`encoded_frame_rate` column as `int64` while representing historical
-fractional rates as `float64` in the Pre-Standard configuration.
-
-## Audited statistics
-
-- Total indexed playback duration: 54.170 hours
-- Canonical playback duration: 44.574 hours
-- Pre-Standard playback duration: 9.596 hours
-- Exact median active-record playback duration: 303.7175 seconds
-- Total indexed video size: 2,030,832,764,048 bytes (2.031 TB decimal)
-- Stored orientation: 479 portrait, 53 landscape
-- Audio streams: 485 present, 47 absent
-- Unknown finish dates: 9
-- Unknown finish times: 62
-
-## Outstanding warnings
-
-1. Fifteen canonical 30×40 records use `support = Paper`, while
-   `Archive_Specifications.md` describes the 30×40 support as Illustration
-   Board. The curator must determine whether the rows or the specification are
-   wrong; this release candidate does not manufacture a correction.
-2. Three creator-confirmed Standard records are shortened derivatives rather
-   than full-duration masters. Their start/end limitations remain explicit in
-   `notes`; none is represented as a complete capture lineage. The promoted
-   July 13 record starts mid-process and reaches a completed, signed endpoint.
-3. The 2026-01-11 and 2026-02-08 additions each produced one non-monotonic
-   duplicate video-timestamp warning during validation but decoded completely.
-   Rec03 from 2026-08-23 produced one end-of-stream non-monotonic DTS warning
-   from FFmpeg's null output during combined-stream validation, while source
-   packet and decoded-frame timestamps at the tail remained strictly increasing.
-   The 2026-01-11 recording also has pronounced lighting variation.
-4. Five Pre-Standard records retain `time = 00:00` while their finish date is
-   unknown. Confirm whether those are documented midnight times or historical
-   placeholders before normalizing them.
-5. Two Pre-Standard records retain incomplete material fields because the
-   filename evidence is insufficient or ambiguous.
+| Unique `record_id` / nonblank Xet identities | 532 / 532 |
+| Direct Standard / Pre-Standard MP4 files | 404 / 128 |
+| Nested noncanonical provenance MP4 files | 5 |
+| Missing indexed targets | 0 |
+| Unindexed direct active-tier MP4 files | 0 |
+| Metadata-to-Hub size mismatches | 0 |
+| Metadata-to-Hub Xet mismatches | 0 |
+
+Indexed video totals remain 2,030,832,764,048 bytes (2.031 TB decimal) and
+54.170 encoded playback hours. Encoded playback time is not real drawing time.
+
+The settled Dataset Viewer reports `canonical/archive` with 404 rows and
+`pre_standard/archive` with 128 rows, 29 columns in each configuration, and no
+pending or failed jobs. Preview, Viewer, search, and filter are valid. The
+separate Statistics surface is unavailable and is not used as evidence of
+row-level completeness.
+
+## Relationship validation
+
+### Fragment sequences
+
+Both dated sidecars pass current structural and metadata-join validation:
+
+| Sidecar | Canonical fragments | Derivatives | Sets | Result |
+| --- | ---: | ---: | ---: | --- |
+| `2026-08-27` | 22 | 5 | 5 | zero errors |
+| `2026-08-29` | 19 | 0 | 4 | zero errors |
+
+The validator now compares canonical byte sizes with joined metadata and emits
+an explicit verification level. These runs used current metadata without a
+same-revision remote inventory, so they correctly report
+`structural_and_metadata_only` and `inventory_binding_checked: false`.
+Historical pinned-inventory receipts remain in the dated sidecar READMEs.
+
+`owner_confirmed_complete` describes the retained canonical source sequence's
+membership and order. It does not independently establish gapless real-world
+capture, real drawing time, or permanent physical-work completion.
+
+### Physical references
+
+The physical-reference sidecar passes its dedicated validator against the
+exact 363-row source metadata at revision
+`ba7e7903901767f2d5a4367d7ae22c2546366d6d`:
+
+| Check | Result |
+| --- | ---: |
+| Source metadata receipt | 190,250 bytes; SHA-256 `2062d1ed0ae83a54cac501e1dfcc23bc6cff087d43fd1242fdd19f3028f3d30d` |
+| Sidecar receipt | 346,794 bytes; SHA-256 `5f3e1ed6c484853cd6df8722e3916b111fc280a1e02a4f9272c0566172821c3a` |
+| Relationship rows / columns | 309 / 32 |
+| Unique `reference_id` / `record_id` | 309 / 309 |
+| Endpoint photographs | 52 |
+| Owner-confirmed record references | 232 |
+| Two-sided work references | 24 |
+| Longitudinal continuations | 1 |
+| Structural, join, hash-state, and manifest errors | 0 |
+
+Nine rows previously said `front_and_paired_hashes_verified` while their paired
+filename and paired hash were blank. They now use the mechanically accurate
+front-only ledger state. No photograph pairing, endpoint, date, material, or
+owner evidence was reinterpreted.
+
+The photographs remain local evidence and are not bundled. This validation
+checks internal consistency and exact historical metadata joins; it is not
+visual authentication of absent media.
+
+## Regression tests
+
+The dependency-free suites currently run 18 tests covering repository receipt
+binding, fragment-size joins and verification levels, and physical-reference
+identity, hash-state, pairing, manifest, and metadata-join failures.
+
+```bash
+python -m unittest discover -s tools -p "test_*.py"
+```
+
+Result: **18/18 passed**.
+
+## Outstanding curator questions and limitations
+
+These remain explicit; validation must not guess their answers:
+
+1. Fifteen canonical 30×40 rows use `support = Paper`, while
+   `Archive_Specifications.md` documents the standard 30×40 support as
+   Illustration Board.
+2. Five Pre-Standard records retain `time = 00:00` while their finish date is
+   partial or unknown. Confirm documented midnight or normalize to unknown.
+3. Two Pre-Standard rows retain incomplete material fields.
+4. Twenty-seven physical-reference rows retain explicit conflict evidence.
+   Conflict language is an adjudication queue, not proof that 27 canonical
+   timestamps are wrong.
+5. Three Standard records are explicitly documented shortened derivatives,
+   not full-duration masters.
 6. Most masters retain an audio stream. Stream presence does not establish
-   meaningful signal, and rights/privacy review remains necessary.
-7. Encoded frame rate is playback rate and cannot be used as original
-   drawing-time sampling.
-8. The 2012–2016 layer has no public video payload at this snapshot.
-9. Separate Hub configurations prevent tier mixing, but no leakage-safe
-   train/validation/test partition has been defined. The dated
-   `fragment_set_label` is not a global `work_id`, so no work-level split is
-   currently possible.
+   meaningful signal; rights and privacy review remain necessary.
+7. Encoded frame rate and playback duration cannot recover real drawing time.
+8. The 2012–2016 archive has no public video payload in this release.
+9. No official train/validation/test partition or global `work_id` exists.
 
 ## Reproduction
 
-Validate both active indexes:
+Validate both active indexes locally:
 
 ```bash
 python tools/validate_metadata.py metadata.csv \
   --pre-standard-metadata Pre_Standard_Time_Lapses/metadata.csv
 ```
 
-For the strongest repository-inventory check, first augment the pinned Hub API
-JSON with the Xet file IDs returned by the same revision's resolve headers:
+For the strongest active-index check, capture an inventory at one immutable
+revision, including exact receipts for both metadata files:
 
 ```bash
-curl --fail --location \
-  --output repo_api_blobs.json \
-  "https://huggingface.co/api/datasets/maxwellinked/time-lapse-artifacts/revision/<40-hex-commit>?blobs=true"
-
 python tools/capture_hub_inventory.py \
   --repo-json repo_api_blobs.json \
   --repo-id maxwellinked/time-lapse-artifacts \
   --revision "<40-hex-commit>" \
-  --output repo_inventory_xet.json
-```
-
-The helper also fetches the small root `metadata.csv` at that immutable
-revision and records its exact SHA-256, byte size, and `X-Repo-Commit` receipt
-under `validationFiles`. The relationship validator rejects a local metadata
-file whose bytes do not match that receipt.
-
-Then validate paths, Xet identities, and exact byte sizes together:
+  --output repo_inventory_xet.json \
+  --validation-file metadata.csv \
+  --validation-file Pre_Standard_Time_Lapses/metadata.csv
 
-```bash
 python tools/validate_metadata.py metadata.csv \
   --pre-standard-metadata Pre_Standard_Time_Lapses/metadata.csv \
   --repo-inventory-json repo_inventory_xet.json
 ```
 
-Validate each dated relationship sidecar against the immutable metadata-bearing
-revision recorded in its `source_hub_revision`. The reusable validator checks
-unique paths and identities, exact sizes, canonical `record_id` joins,
-contiguous `RecNN` positions, set-local derivative sources when present, and
-exclusion of nested derivatives from both active indexes and Viewer
-configurations. The frozen August 27 sidecar and the canonical-only August 29
-sidecar are validated separately against their own pinned inventories.
+Validate the dated fragment sidecars separately because each preserves its own
+source revision:
 
 ```bash
 python tools/validate_fragment_relationships.py \
   --relationships Standard_Time_Lapses/Provenance/2026-08-27/fragment_sequence_relationships.csv \
-  --metadata metadata.csv \
-  --repo-inventory-json repo_inventory_xet.json
-```
-
-The inventory-binding regression suite is self-contained and performs no Hub
-writes:
+  --metadata metadata.csv
 
-```bash
-python tools/test_inventory_binding.py
+python tools/validate_fragment_relationships.py \
+  --relationships Standard_Time_Lapses/Provenance/2026-08-29/fragment_sequence_relationships.csv \
+  --metadata metadata.csv
 ```
 
-A plain JSON list of repository paths is also accepted through the legacy
-`--repo-files-json` spelling, but that checks membership only; it cannot
-independently verify hashes or byte sizes.
-
-Use `--viewer-json` only with a Viewer snapshot produced from the same
-repository revision and configuration under review.
-
-The Pre-Standard technical enrichment is reproducible from a pinned Hub API
-response containing `siblings` with LFS metadata and an FFmpeg executable:
+Retrieve the exact historical metadata bound by the physical-reference
+manifest, then validate the sidecar:
 
 ```bash
-python tools/enrich_prestandard.py \
-  --metadata Pre_Standard_Time_Lapses/metadata.csv \
-  --repo-json repo_inventory_xet.json \
-  --revision "<revision-under-review>" \
-  --ffmpeg /path/to/ffmpeg \
-  --cache prestandard_probe_cache.json \
-  --output Pre_Standard_Time_Lapses/metadata.csv
+hf download maxwellinked/time-lapse-artifacts metadata.csv \
+  --type dataset \
+  --revision ba7e7903901767f2d5a4367d7ae22c2546366d6d \
+  --local-dir physical-reference-source
+
+python tools/validate_physical_references.py \
+  --references Physical_References/endpoint_references.csv \
+  --metadata physical-reference-source/metadata.csv \
+  --manifest Physical_References/MANIFEST.json
 ```
 
-The revision is intentionally explicit: reproducing against a moving branch
-would weaken both identity and technical-metadata claims.
-
-The canonical v0.2 index remains reproducible from its pinned 335-row source
-plus the three audited additions:
-
-```bash
-python tools/repair_metadata.py source_metadata.csv metadata.csv \
-  --additions tools/metadata_additions_v0.2.csv
-```
+Always record the exact repository revision. A moving branch is not a
+reproducible identity receipt.

VIEWER_MIGRATION.md

@@ -1,65 +1,28 @@
-# Dataset Viewer Migration
+# Dataset Viewer Configuration
 
-## Goal
+## Active state
 
-Expose canonical and Pre-Standard recordings as separate Hub configurations so
-users do not mistake different acquisition/documentation eras for an official
-machine-learning split.
+At revision `62891506283585abc76a68dd044eaed1d55d7ab5`:
 
-## Current configuration
+- `canonical/archive` — default; 404 Standard video rows
+- `pre_standard/archive` — 128 Pre-Standard video rows
 
-The release candidate defines:
+Each Viewer row represents one published video object. It does not necessarily
+represent one drawing, session, or complete process.
 
-- `canonical/archive` — default; 385 direct Standard MP4 files
-- `pre_standard/archive` — 128 direct Pre-Standard MP4 files
+Both configurations use the same declared 29-field schema and direct-file
+paths. Provenance subtrees, relationship sidecars, and noncanonical derivatives
+remain outside the Viewer.
 
-Both configurations use explicit direct-file globs. The canonical glob does
-not recurse into `Standard_Time_Lapses/Provenance/`, so supporting historical
-videos cannot enter the canonical Viewer accidentally.
+The split name `archive` means repository membership. It is not a training,
+validation, or evaluation recommendation.
 
-The dated `Standard_Time_Lapses/Provenance/2026-08-27/` layer contains a
-27-row, 15-field relationship sidecar and five nested noncanonical InShot
-derivatives. Neither the sidecar nor those derivative payloads define a Viewer
-configuration or contribute to the 513 active rows.
+## Verification on change
 
-```yaml
-configs:
-- config_name: canonical
-  default: true
-  data_files:
-  - split: archive
-    path:
-    - metadata.csv
-    - Standard_Time_Lapses/*.mp4
-- config_name: pre_standard
-  data_files:
-  - split: archive
-    path:
-    - Pre_Standard_Time_Lapses/metadata.csv
-    - Pre_Standard_Time_Lapses/*.mp4
-```
+Confirm that:
 
-The two configurations share the same declared 29-field schema. Before merge,
-both tiers must have complete core encoded-video metadata, stable IDs, content
-hashes, and byte sizes. Historical descriptive and provenance uncertainty
-remains explicit in the Pre-Standard tier.
-
-## Merge criteria
-
-Merge only after the pull-request preview confirms:
-
-1. `canonical/archive` contains exactly 385 rows.
-2. `pre_standard/archive` contains exactly 128 rows.
-3. No provenance video, including the five dated InShot derivatives, is
-   present in either configuration.
-4. Every expected row contains its metadata.
-5. Stored dimensions and byte sizes load as integers.
-6. `has_audio` loads as a boolean.
-7. Generated Parquet artifacts succeed for both configurations.
-8. The 27 relationship rows resolve against the exact immutable
-   `source_hub_revision`, while remaining outside both Viewer configurations.
-
-## Split terminology
-
-`archive` describes repository membership. It is not a training or evaluation
-recommendation. No official train/validation/test partition exists.
+1. Viewer counts equal the active CSV rows and indexed direct MP4 files.
+2. No `Standard_Time_Lapses/Provenance/` path appears in either configuration.
+3. Both configurations retain identical declared field types.
+4. Generated Parquet artifacts succeed for both configurations.
+5. Unknown values remain null rather than zero or false.

tools/test_fragment_relationships.py

@@ -0,0 +1,198 @@
+#!/usr/bin/env python3
+"""Focused regression tests for fragment relationship validation boundaries."""
+
+from __future__ import annotations
+
+import csv
+import hashlib
+import json
+import subprocess
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+
+TOOLS = Path(__file__).resolve().parent
+VALIDATOR = TOOLS / "validate_fragment_relationships.py"
+REVISION = "a" * 40
+FILE_PATH = (
+    "Standard_Time_Lapses/"
+    "2026-08-29.0716.BallpointPen.Ink.Paper.9x12.Rec01.mp4"
+)
+RECORD_ID = "tla-0000000000000001"
+SHA256 = hashlib.sha256(b"ordinary-file-bytes").hexdigest()
+XET_HASH = hashlib.sha256(b"xet-identity").hexdigest()
+
+
+class FragmentRelationshipValidatorTests(unittest.TestCase):
+    def write_fixture(
+        self,
+        root: Path,
+        *,
+        metadata_size: int = 1234,
+        relationship_size: int = 1234,
+    ) -> tuple[Path, Path, Path]:
+        metadata_path = root / "metadata.csv"
+        relationships_path = root / "relationships.csv"
+        inventory_path = root / "inventory.json"
+
+        with metadata_path.open("w", encoding="utf-8", newline="") as handle:
+            writer = csv.DictWriter(
+                handle,
+                fieldnames=[
+                    "file_name",
+                    "record_id",
+                    "hub_xet_hash",
+                    "size_bytes",
+                ],
+                lineterminator="\n",
+            )
+            writer.writeheader()
+            writer.writerow(
+                {
+                    "file_name": FILE_PATH,
+                    "record_id": RECORD_ID,
+                    "hub_xet_hash": XET_HASH,
+                    "size_bytes": str(metadata_size),
+                }
+            )
+
+        with relationships_path.open("w", encoding="utf-8", newline="") as handle:
+            writer = csv.DictWriter(
+                handle,
+                fieldnames=[
+                    "fragment_set_label",
+                    "object_role",
+                    "record_id",
+                    "file_path",
+                    "sha256",
+                    "hub_xet_hash",
+                    "size_bytes",
+                    "sequence_position",
+                    "sequence_count",
+                    "sequence_completeness",
+                    "source_record_ids",
+                    "derivative_coverage",
+                    "evidence_state",
+                    "source_hub_revision",
+                    "notes",
+                ],
+                lineterminator="\n",
+            )
+            writer.writeheader()
+            writer.writerow(
+                {
+                    "fragment_set_label": (
+                        "2026-08-29.0716.BallpointPen.Ink.Paper.9x12"
+                    ),
+                    "object_role": "canonical_fragment",
+                    "record_id": RECORD_ID,
+                    "file_path": FILE_PATH,
+                    "sha256": SHA256,
+                    "hub_xet_hash": XET_HASH,
+                    "size_bytes": str(relationship_size),
+                    "sequence_position": "1",
+                    "sequence_count": "1",
+                    "sequence_completeness": "owner_confirmed_complete",
+                    "source_record_ids": "",
+                    "derivative_coverage": "",
+                    "evidence_state": (
+                        "owner-confirmed; checksum-computed; media-probed; "
+                        "demux-verified; sampled-decode-verified"
+                    ),
+                    "source_hub_revision": REVISION,
+                    "notes": "",
+                }
+            )
+
+        metadata_bytes = metadata_path.read_bytes()
+        inventory = {
+            "sha": REVISION,
+            "siblings": [
+                {
+                    "rfilename": FILE_PATH,
+                    "size": relationship_size,
+                    "lfs": {
+                        "size": relationship_size,
+                        "sha256": SHA256,
+                    },
+                    "xetHash": XET_HASH,
+                    "repoCommit": REVISION,
+                }
+            ],
+            "validationFiles": {
+                "metadata.csv": {
+                    "sha256": hashlib.sha256(metadata_bytes).hexdigest(),
+                    "size": len(metadata_bytes),
+                    "repoCommit": REVISION,
+                }
+            },
+        }
+        inventory_path.write_text(json.dumps(inventory), encoding="utf-8")
+        return relationships_path, metadata_path, inventory_path
+
+    def run_validator(
+        self,
+        relationships_path: Path,
+        metadata_path: Path,
+        inventory_path: Path | None = None,
+    ) -> subprocess.CompletedProcess[str]:
+        command = [
+            sys.executable,
+            str(VALIDATOR),
+            "--relationships",
+            str(relationships_path),
+            "--metadata",
+            str(metadata_path),
+        ]
+        if inventory_path is not None:
+            command.extend(["--repo-inventory-json", str(inventory_path)])
+        return subprocess.run(
+            command,
+            check=False,
+            capture_output=True,
+            text=True,
+            encoding="utf-8",
+        )
+
+    def test_canonical_size_mismatch_is_rejected(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-size-test-") as temp_dir:
+            relationships, metadata, _inventory = self.write_fixture(
+                Path(temp_dir),
+                metadata_size=1235,
+                relationship_size=1234,
+            )
+            completed = self.run_validator(relationships, metadata)
+
+        self.assertNotEqual(completed.returncode, 0)
+        summary = json.loads(completed.stdout)
+        self.assertTrue(
+            any("canonical size_bytes differs" in error for error in summary["errors"])
+        )
+
+    def test_summary_distinguishes_inventory_binding(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-level-test-") as temp_dir:
+            relationships, metadata, inventory = self.write_fixture(Path(temp_dir))
+            structural = self.run_validator(relationships, metadata)
+            pinned = self.run_validator(relationships, metadata, inventory)
+
+        self.assertEqual(structural.returncode, 0, structural.stdout + structural.stderr)
+        structural_summary = json.loads(structural.stdout)
+        self.assertEqual(
+            structural_summary["verification_level"],
+            "structural_and_metadata_only",
+        )
+        self.assertIs(structural_summary["inventory_binding_checked"], False)
+
+        self.assertEqual(pinned.returncode, 0, pinned.stdout + pinned.stderr)
+        pinned_summary = json.loads(pinned.stdout)
+        self.assertEqual(
+            pinned_summary["verification_level"],
+            "pinned_repository_inventory",
+        )
+        self.assertIs(pinned_summary["inventory_binding_checked"], True)
+
+
+if __name__ == "__main__":
+    unittest.main()

tools/test_physical_references.py

@@ -0,0 +1,404 @@
+#!/usr/bin/env python3
+"""Dependency-free regression tests for the physical-reference validator."""
+
+from __future__ import annotations
+
+import csv
+import hashlib
+import importlib.util
+import json
+import subprocess
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+from types import ModuleType
+from typing import Callable
+
+
+TOOLS = Path(__file__).resolve().parent
+REVISION = "a" * 40
+CURRENT_CONTRADICTION_IDS = (
+    "tlar-eba9ada38b3d1676",
+    "tlar-353ff0c91a613441",
+    "tlar-13d1ae18a80b2c95",
+    "tlar-dd4ebf763866d451",
+    "tlar-2f1c985e929bda8c",
+    "tlar-1a29557234500c2a",
+    "tlar-c0555cf3d60eef5a",
+    "tlar-59cacee4e73aa89d",
+    "tlar-d855108ab1200e88",
+)
+METADATA_FIELDS = [
+    "file_name",
+    "record_id",
+    "collection_tier",
+    "is_canonical",
+    "date",
+    "time",
+    "dimensions",
+    "tool",
+    "medium",
+    "support",
+]
+
+
+def load_module(name: str, path: Path) -> ModuleType:
+    spec = importlib.util.spec_from_file_location(name, path)
+    if spec is None or spec.loader is None:
+        raise RuntimeError(f"unable to load {path}")
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+validator = load_module(
+    "validate_physical_references",
+    TOOLS / "validate_physical_references.py",
+)
+
+
+def write_csv(path: Path, fields: list[str], rows: list[dict[str, str]]) -> None:
+    with path.open("w", encoding="utf-8", newline="") as handle:
+        writer = csv.DictWriter(handle, fieldnames=fields, lineterminator="\n")
+        writer.writeheader()
+        writer.writerows(rows)
+
+
+def build_fixture(
+    root: Path,
+    *,
+    contradictory_hash_states: bool,
+) -> tuple[Path, Path, Path]:
+    references_path = root / "endpoint_references.csv"
+    metadata_path = root / "metadata.csv"
+    manifest_path = root / "MANIFEST.json"
+    metadata_rows: list[dict[str, str]] = []
+    reference_rows: list[dict[str, str]] = []
+
+    for index, reference_id in enumerate(CURRENT_CONTRADICTION_IDS, start=1):
+        record_id = f"tla-{index:016x}"
+        date = f"2025-01-{index:02d}"
+        file_name = (
+            f"Standard_Time_Lapses/{date}.1200."
+            "BallpointPen.Ink.Paper.9x12.mp4"
+        )
+        metadata_rows.append(
+            {
+                "file_name": file_name,
+                "record_id": record_id,
+                "collection_tier": "standard",
+                "is_canonical": "true",
+                "date": date,
+                "time": "12:00",
+                "dimensions": "9x12",
+                "tool": "BallpointPen",
+                "medium": "Ink",
+                "support": "Paper",
+            }
+        )
+        reference_rows.append(
+            {
+                "reference_id": reference_id,
+                "record_id": record_id,
+                "canonical_file_name": file_name,
+                "record_date": date,
+                "record_time": "12:00",
+                "dimensions": "9x12",
+                "tool": "BallpointPen",
+                "medium": "Ink",
+                "support": "Paper",
+                "source_hub_revision": REVISION,
+                "reference_image_filename": f"IMG_{1000 + index:04d}.DNG",
+                "reference_image_number": str(1000 + index),
+                "reference_image_role": "front",
+                "paired_image_filename": "",
+                "relationship_type": "owner_confirmed_record_reference",
+                "surface_scope": "front_surface",
+                "temporal_scope": (
+                    "owner_confirmed_relationship_temporal_endpoint_"
+                    "not_separately_encoded"
+                ),
+                "endpoint_claim_state": "not_asserted_by_derived_layer",
+                "pairing_state": "paired_reference_unresolved",
+                "owner_confirmation_state": "owner_confirmed_record_link",
+                "evidence_state": "owner-confirmed-front-link;back-unresolved",
+                "owner_evidence": "fixture owner confirmation",
+                "paired_image_evidence": "fixture pair remains unresolved",
+                "reference_image_sha256": hashlib.sha256(
+                    f"front:{reference_id}".encode("utf-8")
+                ).hexdigest(),
+                "paired_image_sha256": "",
+                "hash_state": (
+                    "front_and_paired_hashes_verified"
+                    if contradictory_hash_states
+                    else (
+                        "front=verified_from_local_source_ledger;"
+                        "paired=not_available_in_current_source_ledgers"
+                    )
+                ),
+                "source_photo_collection": "fixture_owner_ledger",
+                "reference_media_availability": (
+                    "local_evidence_only_not_bundled_v0.1"
+                ),
+                "proposed_reference_repo_path": "",
+                "proposed_paired_repo_path": "",
+                "machine_use_scope": (
+                    "record_retrieval_and_alignment_exact_temporal_endpoint_"
+                    "not_claimed"
+                ),
+                "caution": "Fixture record link; no exact temporal claim.",
+            }
+        )
+
+    write_csv(metadata_path, METADATA_FIELDS, metadata_rows)
+    write_csv(references_path, validator.FIELDS, reference_rows)
+    metadata_bytes = metadata_path.read_bytes()
+    manifest = {
+        "layer_name": "physical-reference-relationships-v0.1",
+        "source_hub_revision": REVISION,
+        "canonical_metadata_path": "metadata.csv",
+        "sidecar_path": "Physical_References/endpoint_references.csv",
+        "sidecar_sha256": hashlib.sha256(references_path.read_bytes()).hexdigest(),
+        "canonical_schema_field_count": len(METADATA_FIELDS),
+        "record_identity": "record_id",
+        "reference_identity": "reference_id",
+        "reference_media_bundled": False,
+        "internal_review_ledgers_bundled": False,
+        "source_metadata_sha256": hashlib.sha256(metadata_bytes).hexdigest(),
+        "source_metadata_size_bytes": len(metadata_bytes),
+        "counts": {
+            "standard_records_at_source_revision": len(metadata_rows),
+            "owner_confirmed_reference_links": len(reference_rows),
+            "standard_records_without_current_reference_link": 0,
+            "relationship_types": {
+                "owner_confirmed_record_reference": len(reference_rows),
+            },
+            "reference_image_hash_state": {
+                "missing": 0,
+                "present": len(reference_rows),
+            },
+        },
+    }
+    manifest_path.write_text(json.dumps(manifest), encoding="utf-8")
+    return references_path, metadata_path, manifest_path
+
+
+def mutate_references(
+    references_path: Path,
+    manifest_path: Path,
+    mutation: Callable[[list[dict[str, str]]], None],
+) -> None:
+    with references_path.open("r", encoding="utf-8", newline="") as handle:
+        rows = list(csv.DictReader(handle))
+    mutation(rows)
+    write_csv(references_path, validator.FIELDS, rows)
+    manifest = json.loads(manifest_path.read_text(encoding="utf-8"))
+    manifest["sidecar_sha256"] = hashlib.sha256(
+        references_path.read_bytes()
+    ).hexdigest()
+    manifest_path.write_text(json.dumps(manifest), encoding="utf-8")
+
+
+class PhysicalReferenceValidationTests(unittest.TestCase):
+    def test_fixture_models_exactly_nine_current_hash_state_contradictions(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-physical-current-") as temp_dir:
+            paths = build_fixture(
+                Path(temp_dir),
+                contradictory_hash_states=True,
+            )
+            report = validator.validate(*paths)
+            self.assertFalse(report["ok"])
+            self.assertEqual(len(report["errors"]), 9)
+            for reference_id in CURRENT_CONTRADICTION_IDS:
+                self.assertEqual(
+                    sum(reference_id in error for error in report["errors"]),
+                    1,
+                )
+            self.assertTrue(
+                all("hash_state" in error for error in report["errors"]),
+                report["errors"],
+            )
+
+    def test_mechanically_corrected_fixture_passes(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-physical-corrected-") as temp_dir:
+            paths = build_fixture(
+                Path(temp_dir),
+                contradictory_hash_states=False,
+            )
+            report = validator.validate(*paths)
+            self.assertTrue(report["ok"], report["errors"])
+            self.assertEqual(report["errors"], [])
+            self.assertEqual(report["warnings"], [])
+
+    def test_paired_hash_requires_paired_filename(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-physical-pair-hash-") as temp_dir:
+            references, metadata, manifest = build_fixture(
+                Path(temp_dir),
+                contradictory_hash_states=False,
+            )
+
+            def mutation(rows: list[dict[str, str]]) -> None:
+                rows[0]["paired_image_sha256"] = "b" * 64
+                rows[0]["hash_state"] = "front_and_paired_hashes_verified"
+
+            mutate_references(references, manifest, mutation)
+            report = validator.validate(references, metadata, manifest)
+            self.assertTrue(
+                any("paired hash requires paired filename" in e for e in report["errors"])
+            )
+
+    def test_pairing_state_must_follow_paired_filename_presence(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-physical-pair-state-") as temp_dir:
+            references, metadata, manifest = build_fixture(
+                Path(temp_dir),
+                contradictory_hash_states=False,
+            )
+
+            def mutation(rows: list[dict[str, str]]) -> None:
+                rows[0]["paired_image_filename"] = "IMG_2000.DNG"
+
+            mutate_references(references, manifest, mutation)
+            report = validator.validate(references, metadata, manifest)
+            self.assertTrue(
+                any("pairing_state conflicts" in e for e in report["errors"])
+            )
+
+    def test_copied_context_must_match_metadata(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-physical-context-") as temp_dir:
+            references, metadata, manifest = build_fixture(
+                Path(temp_dir),
+                contradictory_hash_states=False,
+            )
+
+            def mutation(rows: list[dict[str, str]]) -> None:
+                rows[0]["record_date"] = "2025-02-01"
+
+            mutate_references(references, manifest, mutation)
+            report = validator.validate(references, metadata, manifest)
+            self.assertTrue(
+                any("record_date differs from metadata date" in e for e in report["errors"])
+            )
+
+    def test_duplicate_identity_is_rejected(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-physical-duplicate-") as temp_dir:
+            references, metadata, manifest = build_fixture(
+                Path(temp_dir),
+                contradictory_hash_states=False,
+            )
+
+            def mutation(rows: list[dict[str, str]]) -> None:
+                rows[1]["reference_id"] = rows[0]["reference_id"]
+
+            mutate_references(references, manifest, mutation)
+            report = validator.validate(references, metadata, manifest)
+            self.assertTrue(
+                any("duplicate reference_id" in e for e in report["errors"])
+            )
+
+    def test_relationship_tuple_is_rejected_without_interpreting_evidence(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-physical-tuple-") as temp_dir:
+            references, metadata, manifest = build_fixture(
+                Path(temp_dir),
+                contradictory_hash_states=False,
+            )
+
+            def mutation(rows: list[dict[str, str]]) -> None:
+                rows[0]["endpoint_claim_state"] = (
+                    "owner_confirmed_endpoint_photograph_link"
+                )
+
+            mutate_references(references, manifest, mutation)
+            report = validator.validate(references, metadata, manifest)
+            self.assertTrue(
+                any(
+                    "endpoint_claim_state conflicts with relationship_type" in e
+                    for e in report["errors"]
+                )
+            )
+
+    def test_local_only_media_cannot_claim_repository_path(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-physical-media-") as temp_dir:
+            references, metadata, manifest = build_fixture(
+                Path(temp_dir),
+                contradictory_hash_states=False,
+            )
+
+            def mutation(rows: list[dict[str, str]]) -> None:
+                rows[0]["proposed_reference_repo_path"] = "invented/IMG_1001.DNG"
+
+            mutate_references(references, manifest, mutation)
+            report = validator.validate(references, metadata, manifest)
+            self.assertTrue(
+                any("local-only reference" in e for e in report["errors"])
+            )
+
+    def test_manifest_sidecar_receipt_detects_byte_drift(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-physical-manifest-") as temp_dir:
+            references, metadata, manifest = build_fixture(
+                Path(temp_dir),
+                contradictory_hash_states=False,
+            )
+            references.write_bytes(references.read_bytes() + b"\n")
+            report = validator.validate(references, metadata, manifest)
+            self.assertTrue(
+                any("sidecar_sha256 differs" in e for e in report["errors"])
+            )
+
+    def test_source_metadata_receipt_detects_byte_drift(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-physical-metadata-") as temp_dir:
+            references, metadata, manifest = build_fixture(
+                Path(temp_dir),
+                contradictory_hash_states=False,
+            )
+            metadata.write_bytes(metadata.read_bytes() + b"\n")
+            report = validator.validate(references, metadata, manifest)
+            self.assertTrue(
+                any("source_metadata_sha256" in e for e in report["errors"])
+            )
+            self.assertTrue(
+                any("source_metadata_size_bytes" in e for e in report["errors"])
+            )
+
+    def test_cli_exit_code_follows_report(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="tla-physical-cli-") as temp_dir:
+            references, metadata, manifest = build_fixture(
+                Path(temp_dir),
+                contradictory_hash_states=False,
+            )
+            command = [
+                sys.executable,
+                str(TOOLS / "validate_physical_references.py"),
+                "--references",
+                str(references),
+                "--metadata",
+                str(metadata),
+                "--manifest",
+                str(manifest),
+            ]
+            completed = subprocess.run(
+                command,
+                check=False,
+                capture_output=True,
+                text=True,
+                encoding="utf-8",
+            )
+            self.assertEqual(completed.returncode, 0, completed.stdout + completed.stderr)
+
+            def mutation(rows: list[dict[str, str]]) -> None:
+                rows[0]["hash_state"] = "front_and_paired_hashes_verified"
+
+            mutate_references(references, manifest, mutation)
+            completed = subprocess.run(
+                command,
+                check=False,
+                capture_output=True,
+                text=True,
+                encoding="utf-8",
+            )
+            self.assertEqual(completed.returncode, 1)
+            self.assertIn("hash_state", completed.stdout)
+
+
+if __name__ == "__main__":
+    unittest.main()

tools/validate_fragment_relationships.py

@@ -194,6 +194,17 @@ def main() -> None:
                 errors.append(f"{label}: canonical record_id/path does not join to metadata")
             if metadata and metadata.get("hub_xet_hash") != row.get("hub_xet_hash"):
                 errors.append(f"{label}: canonical Xet identity differs from metadata")
+            if metadata and "size_bytes" in metadata:
+                try:
+                    metadata_size = int(metadata.get("size_bytes", ""))
+                    relationship_size = int(row.get("size_bytes", ""))
+                except ValueError:
+                    errors.append(f"{label}: canonical size_bytes cannot be compared")
+                else:
+                    if metadata_size != relationship_size:
+                        errors.append(
+                            f"{label}: canonical size_bytes differs from metadata"
+                        )
             if row.get("source_record_ids") or row.get("derivative_coverage"):
                 errors.append(f"{label}: canonical row has derivative-only values")
             expected_path_prefix = (
@@ -329,6 +340,12 @@ def main() -> None:
         ),
         "noncanonical_derivatives": len(derivatives),
         "fragment_sets": len(canonical_by_set),
+        "verification_level": (
+            "pinned_repository_inventory"
+            if args.repo_inventory_json is not None
+            else "structural_and_metadata_only"
+        ),
+        "inventory_binding_checked": args.repo_inventory_json is not None,
         "errors": errors,
     }
     print(json.dumps(summary, indent=2))

tools/validate_physical_references.py

@@ -0,0 +1,541 @@
+#!/usr/bin/env python3
+"""Validate the derived physical-reference sidecar without inferring curator facts."""
+
+from __future__ import annotations
+
+import argparse
+import csv
+import hashlib
+import json
+import re
+import sys
+from collections import Counter
+from pathlib import Path
+
+
+FIELDS = [
+    "reference_id",
+    "record_id",
+    "canonical_file_name",
+    "record_date",
+    "record_time",
+    "dimensions",
+    "tool",
+    "medium",
+    "support",
+    "source_hub_revision",
+    "reference_image_filename",
+    "reference_image_number",
+    "reference_image_role",
+    "paired_image_filename",
+    "relationship_type",
+    "surface_scope",
+    "temporal_scope",
+    "endpoint_claim_state",
+    "pairing_state",
+    "owner_confirmation_state",
+    "evidence_state",
+    "owner_evidence",
+    "paired_image_evidence",
+    "reference_image_sha256",
+    "paired_image_sha256",
+    "hash_state",
+    "source_photo_collection",
+    "reference_media_availability",
+    "proposed_reference_repo_path",
+    "proposed_paired_repo_path",
+    "machine_use_scope",
+    "caution",
+]
+
+METADATA_FIELDS = [
+    "file_name",
+    "record_id",
+    "collection_tier",
+    "is_canonical",
+    "date",
+    "time",
+    "dimensions",
+    "tool",
+    "medium",
+    "support",
+]
+
+CONTEXT_FIELDS = {
+    "canonical_file_name": "file_name",
+    "record_date": "date",
+    "record_time": "time",
+    "dimensions": "dimensions",
+    "tool": "tool",
+    "medium": "medium",
+    "support": "support",
+}
+
+REQUIRED_ROW_FIELDS = {
+    "reference_id",
+    "record_id",
+    "canonical_file_name",
+    "record_date",
+    "dimensions",
+    "tool",
+    "medium",
+    "support",
+    "source_hub_revision",
+    "reference_image_filename",
+    "reference_image_number",
+    "reference_image_role",
+    "relationship_type",
+    "surface_scope",
+    "temporal_scope",
+    "endpoint_claim_state",
+    "pairing_state",
+    "owner_confirmation_state",
+    "evidence_state",
+    "owner_evidence",
+    "paired_image_evidence",
+    "hash_state",
+    "source_photo_collection",
+    "reference_media_availability",
+    "machine_use_scope",
+    "caution",
+}
+
+ROLE_TO_SURFACE = {
+    "front": "front_surface",
+    "artwork-side-a": "physical_side_a",
+    "artwork-side-b": "physical_side_b",
+    "endpoint-side-unresolved": "physical_side_unresolved",
+    "front-later-state": "front_surface_later_state",
+}
+
+RELATIONSHIP_CONTRACT = {
+    "owner_confirmed_record_reference": {
+        "roles": {"front"},
+        "temporal_scope": (
+            "owner_confirmed_relationship_temporal_endpoint_not_separately_encoded"
+        ),
+        "endpoint_claim_state": "not_asserted_by_derived_layer",
+        "machine_use_scope": (
+            "record_retrieval_and_alignment_exact_temporal_endpoint_not_claimed"
+        ),
+    },
+    "endpoint_photograph": {
+        "roles": {"front", "endpoint-side-unresolved"},
+        "temporal_scope": "record_endpoint_as_owner_confirmed",
+        "endpoint_claim_state": "owner_confirmed_endpoint_photograph_link",
+        "machine_use_scope": (
+            "record_conditioned_endpoint_alignment_after_reference_media_publication"
+        ),
+    },
+    "two_sided_work_reference": {
+        "roles": {"front", "artwork-side-a", "artwork-side-b"},
+        "temporal_scope": (
+            "owner_confirmed_record_relationship_temporal_endpoint_not_separately_encoded"
+        ),
+        "endpoint_claim_state": "not_asserted_by_derived_layer",
+        "machine_use_scope": (
+            "two_sided_work_analysis_not_assumed_same_visual_surface"
+        ),
+    },
+    "longitudinal_continuation": {
+        "roles": {"front-later-state"},
+        "temporal_scope": "later_physical_state_after_recorded_stage",
+        "endpoint_claim_state": "not_an_exact_endpoint_claim",
+        "machine_use_scope": (
+            "longitudinal_state_change_analysis_not_exact_endpoint_supervision"
+        ),
+    },
+}
+
+REFERENCE_ID_RE = re.compile(r"^tlar-[0-9a-f]{16}$")
+RECORD_ID_RE = re.compile(r"^tla-[0-9a-f]{16}$")
+REVISION_RE = re.compile(r"^[0-9a-f]{40}$")
+HASH_RE = re.compile(r"^[0-9a-f]{64}$")
+STANDARD_PATH_RE = re.compile(r"^Standard_Time_Lapses/[^/]+\.mp4$")
+LOCAL_MEDIA_STATE = "local_evidence_only_not_bundled_v0.1"
+SIDECAR_REPO_PATH = "Physical_References/endpoint_references.csv"
+
+
+def read_csv(path: Path) -> tuple[list[str], list[dict[str, str]]]:
+    with path.open("r", encoding="utf-8-sig", newline="") as handle:
+        reader = csv.DictReader(handle)
+        if reader.fieldnames is None:
+            raise ValueError(f"CSV has no header: {path}")
+        return list(reader.fieldnames), list(reader)
+
+
+def duplicate_values(rows: list[dict[str, str]], field: str) -> list[str]:
+    counts = Counter(row.get(field, "") for row in rows if row.get(field, ""))
+    return sorted(value for value, count in counts.items() if count > 1)
+
+
+def validate_semicolon_list(
+    value: str,
+    label: str,
+    field: str,
+    errors: list[str],
+) -> None:
+    if not value:
+        errors.append(f"{label}: {field} is blank")
+        return
+    tokens = [token.strip() for token in value.split(";")]
+    if any(not token for token in tokens):
+        errors.append(f"{label}: {field} contains an empty list item")
+    if len(tokens) != len(set(tokens)):
+        errors.append(f"{label}: {field} contains duplicate list values")
+
+
+def expected_hash_state(row: dict[str, str]) -> str | None:
+    front_hash = bool(row.get("reference_image_sha256", ""))
+    paired_hash = bool(row.get("paired_image_sha256", ""))
+    paired_filename = bool(row.get("paired_image_filename", ""))
+    if front_hash and paired_hash:
+        return "front_and_paired_hashes_verified"
+    if front_hash:
+        return (
+            "front=verified_from_local_source_ledger;"
+            "paired=not_available_in_current_source_ledgers"
+        )
+    if paired_hash:
+        return None
+    if paired_filename:
+        return (
+            "front=not_available_in_current_source_ledgers;"
+            "paired=not_available_in_current_source_ledgers"
+        )
+    return "not_available_in_current_source_ledgers"
+
+
+def validate_manifest(
+    manifest: dict[str, object],
+    references_path: Path,
+    metadata_path: Path,
+    metadata_fields: list[str],
+    metadata_rows: list[dict[str, str]],
+    rows: list[dict[str, str]],
+    declared_revision: str,
+    errors: list[str],
+    warnings: list[str],
+) -> None:
+    expected_strings = {
+        "canonical_metadata_path": "metadata.csv",
+        "sidecar_path": SIDECAR_REPO_PATH,
+        "record_identity": "record_id",
+        "reference_identity": "reference_id",
+    }
+    for field, expected in expected_strings.items():
+        if manifest.get(field) != expected:
+            errors.append(f"manifest {field} must be {expected!r}")
+
+    if manifest.get("reference_media_bundled") is not False:
+        errors.append("manifest reference_media_bundled must be false")
+    if manifest.get("internal_review_ledgers_bundled") is not False:
+        errors.append("manifest internal_review_ledgers_bundled must be false")
+    if manifest.get("source_hub_revision") != declared_revision:
+        errors.append("manifest source_hub_revision differs from the sidecar")
+
+    sidecar_hash = hashlib.sha256(references_path.read_bytes()).hexdigest()
+    if manifest.get("sidecar_sha256") != sidecar_hash:
+        errors.append("manifest sidecar_sha256 differs from the sidecar bytes")
+
+    field_count = manifest.get("canonical_schema_field_count")
+    if field_count != len(metadata_fields):
+        errors.append(
+            "manifest canonical_schema_field_count differs from supplied metadata"
+        )
+
+    counts = manifest.get("counts")
+    if not isinstance(counts, dict):
+        errors.append("manifest counts must be an object")
+        counts = {}
+
+    linked_count = len({row.get("record_id", "") for row in rows if row.get("record_id")})
+    if counts.get("owner_confirmed_reference_links") != len(rows):
+        errors.append("manifest owner_confirmed_reference_links differs from row count")
+
+    actual_relationship_counts = dict(
+        sorted(Counter(row.get("relationship_type", "") for row in rows).items())
+    )
+    if counts.get("relationship_types") != actual_relationship_counts:
+        errors.append("manifest relationship_types differs from sidecar counts")
+
+    actual_hash_counts = {
+        "missing": sum(not row.get("reference_image_sha256", "") for row in rows),
+        "present": sum(bool(row.get("reference_image_sha256", "")) for row in rows),
+    }
+    if counts.get("reference_image_hash_state") != actual_hash_counts:
+        errors.append("manifest reference_image_hash_state differs from sidecar counts")
+
+    source_count = counts.get("standard_records_at_source_revision")
+    unlinked_count = counts.get("standard_records_without_current_reference_link")
+    if (
+        not isinstance(source_count, int)
+        or isinstance(source_count, bool)
+        or source_count < linked_count
+    ):
+        errors.append("manifest standard_records_at_source_revision is invalid")
+    elif unlinked_count != source_count - linked_count:
+        errors.append(
+            "manifest standard_records_without_current_reference_link "
+            "fails source-minus-linked arithmetic"
+        )
+
+    metadata_hash_receipt = manifest.get("source_metadata_sha256")
+    metadata_size_receipt = manifest.get("source_metadata_size_bytes")
+    if metadata_hash_receipt is None and metadata_size_receipt is None:
+        warnings.append(
+            "manifest lacks a source metadata byte receipt; the metadata join "
+            "shows compatibility but not pinned-byte identity"
+        )
+    elif metadata_hash_receipt is None or metadata_size_receipt is None:
+        errors.append("manifest source metadata byte receipt is incomplete")
+    else:
+        metadata_bytes = metadata_path.read_bytes()
+        if not isinstance(metadata_hash_receipt, str) or not HASH_RE.fullmatch(
+            metadata_hash_receipt
+        ):
+            errors.append("manifest source_metadata_sha256 is invalid")
+        elif hashlib.sha256(metadata_bytes).hexdigest() != metadata_hash_receipt:
+            errors.append("supplied metadata differs from manifest source_metadata_sha256")
+        if (
+            not isinstance(metadata_size_receipt, int)
+            or isinstance(metadata_size_receipt, bool)
+            or metadata_size_receipt < 0
+        ):
+            errors.append("manifest source_metadata_size_bytes is invalid")
+        elif len(metadata_bytes) != metadata_size_receipt:
+            errors.append(
+                "supplied metadata size differs from manifest source_metadata_size_bytes"
+            )
+        pinned_standard_count = sum(
+            row.get("collection_tier") == "standard"
+            and row.get("is_canonical", "").lower() == "true"
+            for row in metadata_rows
+        )
+        if isinstance(source_count, int) and source_count != pinned_standard_count:
+            errors.append(
+                "manifest standard_records_at_source_revision differs from "
+                "receipt-bound metadata"
+            )
+
+
+def validate(
+    references_path: Path,
+    metadata_path: Path,
+    manifest_path: Path,
+) -> dict[str, object]:
+    errors: list[str] = []
+    warnings: list[str] = []
+
+    reference_fields, rows = read_csv(references_path)
+    metadata_fields, metadata_rows = read_csv(metadata_path)
+    if reference_fields != FIELDS:
+        errors.append(f"physical-reference field contract differs: {reference_fields}")
+    missing_metadata_fields = [
+        field for field in METADATA_FIELDS if field not in metadata_fields
+    ]
+    if missing_metadata_fields:
+        errors.append(f"metadata is missing join fields: {missing_metadata_fields}")
+    if not rows:
+        errors.append("physical-reference sidecar must contain at least one row")
+
+    try:
+        loaded_manifest = json.loads(manifest_path.read_text(encoding="utf-8"))
+    except (OSError, json.JSONDecodeError) as exc:
+        errors.append(f"unable to read manifest: {exc}")
+        loaded_manifest = {}
+    if not isinstance(loaded_manifest, dict):
+        errors.append("manifest must be a JSON object")
+        manifest: dict[str, object] = {}
+    else:
+        manifest = loaded_manifest
+
+    for field in ("reference_id", "record_id", "canonical_file_name"):
+        duplicates = duplicate_values(rows, field)
+        if duplicates:
+            errors.append(f"duplicate {field} values: {duplicates[:10]}")
+
+    metadata_duplicates = duplicate_values(metadata_rows, "record_id")
+    if metadata_duplicates:
+        errors.append(f"duplicate metadata record_id values: {metadata_duplicates[:10]}")
+    metadata_by_id = {
+        row.get("record_id", ""): row
+        for row in metadata_rows
+        if row.get("record_id", "")
+    }
+
+    revisions = {row.get("source_hub_revision", "") for row in rows}
+    if len(revisions) != 1:
+        errors.append("source_hub_revision must be one shared immutable commit")
+        declared_revision = ""
+    else:
+        declared_revision = next(iter(revisions))
+        if not REVISION_RE.fullmatch(declared_revision):
+            errors.append("source_hub_revision must be 40 lowercase hexadecimal characters")
+
+    for index, row in enumerate(rows, start=2):
+        reference_id = row.get("reference_id", "")
+        label = f"row {index} {reference_id or row.get('canonical_file_name', '')}"
+
+        for field in REQUIRED_ROW_FIELDS:
+            if not row.get(field, ""):
+                errors.append(f"{label}: {field} is blank")
+
+        if not REFERENCE_ID_RE.fullmatch(reference_id):
+            errors.append(f"{label}: invalid reference_id")
+        record_id = row.get("record_id", "")
+        if not RECORD_ID_RE.fullmatch(record_id):
+            errors.append(f"{label}: invalid record_id")
+        if not STANDARD_PATH_RE.fullmatch(row.get("canonical_file_name", "")):
+            errors.append(f"{label}: canonical_file_name is not a direct Standard MP4")
+
+        for field in ("reference_image_sha256", "paired_image_sha256"):
+            value = row.get(field, "")
+            if value and not HASH_RE.fullmatch(value):
+                errors.append(
+                    f"{label}: {field} must be 64 lowercase hexadecimal characters"
+                )
+
+        number = row.get("reference_image_number", "")
+        number_match = re.search(
+            r"(\d+)$", Path(row.get("reference_image_filename", "")).stem
+        )
+        if not number.isdigit() or not number_match:
+            errors.append(f"{label}: reference_image_number is not recoverable from filename")
+        elif int(number) != int(number_match.group(1)):
+            errors.append(f"{label}: reference_image_number differs from filename")
+
+        role = row.get("reference_image_role", "")
+        expected_surface = ROLE_TO_SURFACE.get(role)
+        if expected_surface is None:
+            errors.append(f"{label}: invalid reference_image_role")
+        elif row.get("surface_scope", "") != expected_surface:
+            errors.append(f"{label}: surface_scope conflicts with reference_image_role")
+
+        relationship_type = row.get("relationship_type", "")
+        relationship_contract = RELATIONSHIP_CONTRACT.get(relationship_type)
+        if relationship_contract is None:
+            errors.append(f"{label}: invalid relationship_type")
+        else:
+            roles = relationship_contract["roles"]
+            if isinstance(roles, set) and role not in roles:
+                errors.append(
+                    f"{label}: reference_image_role conflicts with relationship_type"
+                )
+            for field in (
+                "temporal_scope",
+                "endpoint_claim_state",
+                "machine_use_scope",
+            ):
+                if row.get(field, "") != relationship_contract[field]:
+                    errors.append(
+                        f"{label}: {field} conflicts with relationship_type"
+                    )
+
+        paired_filename = bool(row.get("paired_image_filename", ""))
+        paired_hash = bool(row.get("paired_image_sha256", ""))
+        front_hash = bool(row.get("reference_image_sha256", ""))
+        if paired_hash and not paired_filename:
+            errors.append(f"{label}: paired hash requires paired filename")
+        if paired_hash and not front_hash:
+            errors.append(f"{label}: paired hash cannot exist without a front hash")
+
+        pairing_state = row.get("pairing_state", "")
+        if paired_filename and pairing_state not in {
+            "paired_reference_confirmed",
+            "paired_filename_present_relationship_qualified_in_evidence",
+        }:
+            errors.append(f"{label}: pairing_state conflicts with paired filename")
+        if not paired_filename and pairing_state not in {
+            "paired_reference_unresolved",
+            "no_paired_image_in_current_ledger",
+        }:
+            errors.append(f"{label}: pairing_state conflicts with absent paired filename")
+
+        expected_state = expected_hash_state(row)
+        if expected_state is not None and row.get("hash_state", "") != expected_state:
+            errors.append(
+                f"{label}: hash_state {row.get('hash_state', '')!r} "
+                f"must be {expected_state!r}"
+            )
+
+        if row.get("owner_confirmation_state", "") != "owner_confirmed_record_link":
+            errors.append(f"{label}: invalid owner_confirmation_state")
+        if row.get("reference_media_availability", "") != LOCAL_MEDIA_STATE:
+            errors.append(f"{label}: invalid reference_media_availability")
+        if row.get("proposed_reference_repo_path", ""):
+            errors.append(f"{label}: local-only reference has a proposed repository path")
+        if row.get("proposed_paired_repo_path", ""):
+            errors.append(f"{label}: local-only paired reference has a repository path")
+
+        for field in ("evidence_state", "source_photo_collection"):
+            validate_semicolon_list(row.get(field, ""), label, field, errors)
+
+        metadata = metadata_by_id.get(record_id)
+        if metadata is None:
+            errors.append(f"{label}: record_id is absent from supplied metadata")
+        else:
+            if metadata.get("collection_tier", "") != "standard":
+                errors.append(f"{label}: joined metadata row is not Standard")
+            if metadata.get("is_canonical", "").lower() != "true":
+                errors.append(f"{label}: joined metadata row is not canonical")
+            for sidecar_field, metadata_field in CONTEXT_FIELDS.items():
+                if row.get(sidecar_field, "") != metadata.get(metadata_field, ""):
+                    errors.append(
+                        f"{label}: {sidecar_field} differs from metadata {metadata_field}"
+                    )
+
+    validate_manifest(
+        manifest,
+        references_path,
+        metadata_path,
+        metadata_fields,
+        metadata_rows,
+        rows,
+        declared_revision,
+        errors,
+        warnings,
+    )
+
+    return {
+        "ok": not errors,
+        "errors": errors,
+        "warnings": warnings,
+        "statistics": {
+            "relationship_rows": len(rows),
+            "relationship_columns": len(reference_fields),
+            "metadata_rows_supplied": len(metadata_rows),
+            "unique_reference_ids": len(
+                {row.get("reference_id", "") for row in rows if row.get("reference_id")}
+            ),
+            "unique_record_ids": len(
+                {row.get("record_id", "") for row in rows if row.get("record_id")}
+            ),
+            "relationship_type_counts": dict(
+                sorted(Counter(row.get("relationship_type", "") for row in rows).items())
+            ),
+            "declared_source_hub_revision": declared_revision,
+        },
+    }
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--references", type=Path, required=True)
+    parser.add_argument("--metadata", type=Path, required=True)
+    parser.add_argument("--manifest", type=Path, required=True)
+    parser.add_argument("--output", type=Path)
+    args = parser.parse_args()
+
+    report = validate(args.references, args.metadata, args.manifest)
+    rendered = json.dumps(report, indent=2, sort_keys=True)
+    if args.output:
+        args.output.parent.mkdir(parents=True, exist_ok=True)
+        args.output.write_text(rendered + "\n", encoding="utf-8")
+    print(rendered)
+    if not report["ok"]:
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()