originDNA · ledger + attestation

The decision, on the record — and readable.

originDNA is the evidence layer of ozDNA. The Ledger writes every decision, vote, rationale and outcome to an append-only, hash-chained record (Article 12). The Attestation renders that record into something an auditor or regulator can actually read (Article 13).

Request a compliance audit ← See complyDNA

Ledger · Art. 12 — record-keeping

Append-only, hash-chained

Article 12 asks for automatic event logs that are traceable and cannot be quietly altered after the fact. The Ledger chains each entry to the previous one by hash, so any later edit breaks the chain and is detectable.

APPEND-ONLY

Nothing is overwritten

Entries are only added. A correction is a new entry, not an edit — the original stays on the record.

HASH-CHAINED

Tamper-evident

Each entry carries the previous entry's hash. Change one and every entry after it no longer verifies.

COMPLETE

Decision + votes + rationale

The record isn't just the outcome — it's how the outcome was reached, including the Council's votes and any veto.

Attestation · Art. 13 — transparency

One decision, as it leaves the Ledger

A redacted, illustrative attestation for a single high-risk decision the Council reviewed. The veto path — a decision held rather than cleared — is the point: the record shows oversight actually bit.

attestation · sampleSEALED · APPEND-ONLY

decision_id   ozd-2026-08-04-7Q31
risk_tier     HIGH  (DT 5.0 · Art. 9)
routed_to     Council  (Art. 14)
council_vote  4 approve · 1 veto  →  HELD (fail-closed)
rationale     one model raised an unresolved edge case;
             the judge defaulted to a stop.
outcome       escalated to a human owner; not auto-cleared
recorded      2026-08-04T09:41:22Z  (Ledger · Art. 12)
prev_hash     a91f…c40d
this_hash     3e77…8b12  (hash-chained)
attested_to   deployer + auditor  (Art. 13)

Illustrative mock, values redacted. No real case data.

Mapping

originDNA ↔ the Act

Component	What it implements	Article
Ledger	Automatic, traceable, tamper-evident event logging	Art. 12
Attestation	A decision's rationale and limits, presented to a deployer or auditor	Art. 13

originDNA evidences these obligations; it makes no absolute compliance claim. The decisions it records are produced by complyDNA.

Turn your decisions into evidence

An audit shows what a sealed, readable record of your automated decisions would look like.

Request a compliance audit