The corpus as a dataset

The complete capture index is published as machine-readable JSON: one record per stored version with provider, model, capture time, source URL, SHA-256, size, and provenance status.

ledger.json — 2,620 records since 11 Aug 2026, regenerated on every build. Metadata is CC0; the full corpus (raw bytes, manifests, OpenTimestamps proofs, event log) lives in the public repository.

Fields

Top-level keys: generated_utc, license, source (site origin), repository, records.

• source_id, provider, model — what the capture belongs to
• kind — one of aial-archive, aial-eval, aial-eval-history, aial-eval-page, aial-method, cop-doc, provider-live, provider-page, regulatory, watch-page (labels as on the site: AIAL archived copy; AIAL evaluation; AIAL evaluation (earlier state); AIAL evaluation page; AIAL scoring framework; Code of Practice doc (Art. 53(1)(a)–(c)); provider site; provider page; official document; watched page). The AI Accountability Lab's own research about a summary — aial-eval, aial-eval-history, aial-eval-page, aial-method — is archived here and deliberately not served: those records carry hashes and provenance, and their blob_url is null. aial-archive is not withheld: it is the provider's own document, mirrored by the Lab, and is served like any other provider document. A capture of the Lab's tracker pages is withheld by address rather than by kind.
• captured_utc — record-write timestamp (UTC, ISO 8601); it can trail the HTTP fetch by seconds (for fanned-out captures, up to ~90s) — the version page's Fetched field is authoritative
• url — the fetched location; expiring signature tokens are masked with …, so masked URLs are records, not resolvable links
• sha256, size_bytes, text_sha256 — content identity; text_sha256 is null when no text could be extracted
• ots, wayback — provenance status
• permalink — the version page serving the stored bytes and proof (site-relative; prepend source)
• blob_url, ots_url — the stored bytes and this capture's own OpenTimestamps proof (site-relative; null when not served); wayback_snapshot — the Wayback Machine capture recorded for it, or null; wayback_witnesses_capture — true only when the snapshot was taken within an hour of this capture; false when it is an older capture the Wayback Machine returned instead of crawling, or one saved long afterwards, neither of which vouches for these bytes; wayback_snapshot_same_url — false when the snapshot archives a redirect target rather than the tracked address

Scope of the changes feed

The changes feed covers content changes to already-tracked summaries (same target, new content). Newly published summaries appear on the status page when discovered.

Cite this archive

Cite version permalinks directly — they are stable. Suggested form: GPAI Ledger, “<Model> training-data summary, version of <date>”, <permalink URL>, accessed <date>.

For legal or licensing matters requiring verifiable copies of specific captures, write to contact@gpailedger.com.