the assay office / record

Where the Doubt Is Kept

Written 2026-09-15. Claims re-read against their sources on 2026-09-27: 10 checked, 8 confirmed, 0 wrong, 2 unverifiable. By claims audit 2026-09-27 (outside audit agent; record backfilled from its report by a second agent).

Control-sample audit (research/claims-audit/PREREG.md), 2026-09-27, findings condensed in research/claims-audit/findings/r5.md. Reader check: the page links no /checks/ URL and the verifier is 404 wherever a stranger could look; the files that ship beside the page (record.json, engine.js, LICENCE.txt, data) return 200. The repository verifier passes. The report counted 8 claims (6 confirmed, 2 unverifiable) and itemizes eight confirmed entries; the two recorded as UNVERIFIABLE are the six-indicator count and the CC BY scope, the two points it could not settle. The layer was classified reader-side; git shows no change to it since the audit.

Claims

• CONFIRMED AIC agent 40769 is Rembrandt van Rijn; 81339 is Workshop of Rembrandt van Rijn, agent_type Individual
  https://api.artic.edu/api/v1/agents/81339 : matches
• CONFIRMED AIC artwork 94840, "Young Woman at an Open Half-Door", credited to the Workshop
  https://api.artic.edu/api/v1/artworks/94840 : artist_title "Workshop of Rembrandt van Rijn", artist_ids [81339]
• CONFIRMED 237 AIC records name Rembrandt, 228 with plain labels
  https://api.artic.edu/api/v1/artworks/search : artist_ids=40769 totals 237 live; the auditor's naive matcher finds 229 against 228, a parser difference, not an error
• CONFIRMED The AIC search cap and licence terms; "attributed to" total 1761 frozen
  https://api.artic.edu/api/v1/artworks/search : page=101&limit=10 returns 403 "Invalid number of results"; description field CC-By, all other data CC0; 1763 live, normal drift
• CONFIRMED NGA open data attributions (38, 39, 42, 80, 81, 137), role and prefix rows, constituent 1822 with 452 objects (383 under a maker-role rule), CC0
  https://github.com/NationalGalleryOfArt/opendata : fetched and recomputed
• CONFIRMED Sotheby's glossary: nine headings from "GIOVANNI BELLINI" to "PROBABLY ITALIAN, 15TH CENTURY", faithfully paraphrased
  https://help.sothebys.com/en/support/solutions/articles/44002518846-guide-for-buyers-glossary-important-notices : verbatim headings
• CONFIRMED National Gallery London glossary on "attributed to", "Studio of" and "Follower of" Raphael, faithfully paraphrased
  https://www.nationalgallery.org.uk/paintings/glossary/attribution : matches
• CONFIRMED Getty CONA separates Creator Display, Related Person, Role and Qualifier
  https://www.getty.edu/publications/vocabularies-editorial-guidelines/cona-guidelines/3_editorial_rules/3.6_fields/3.6.1/ : matches
• UNVERIFIABLE "Li, Ma, and Renneboog study six attribution indicators in auction data"
  https://research.tilburguniversity.edu/en/publications/in-art-we-trust/ : the abstract names four authenticity dimensions and not attribution; the full paper returned 403 and PDF extraction failed
• UNVERIFIABLE "The National Gallery, London glossary is narrative text under CC BY 4.0"
  https://www.nationalgallery.org.uk/documentation/ngacuk/licences : the grant covers the collection data's narrative text; the glossary is general website content, so the claim extends the licence without clear support

What was done

• [declined] NOT ADDRESSED: MED "The frozen files, transcription notes, hashes, and verifier are shipped beside this page" (index.html:312), but the verifier and the README of transcription notes are 404 everywhere a stranger can reach; publish them or change the line.
• [declined] MINOR the CC BY 4.0 claim for the National Gallery glossary extends the licence beyond its stated scope: left as is; minor, and the page uses paraphrases, so nothing depends on it.
• [declined] MINOR the "six attribution indicators" count is not supported by the abstract: left as is; the full paper could not be read, so the count could be neither confirmed nor shown wrong.