Protocol first
Policy Snapshot, Decision Dossier, Decision Chain, and Decision Ledger evidence are the normal audit record.
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API documentation
Audit Anchoring
Audit anchoring is the Decionis integrity posture for governed decisions: record the policy active at decision time, preserve the dossier and chain evidence, then optionally notarize hashes outside Decionis when a buyer or regulator requires independent proof.
Posture
Decionis leads with tamper-evident audit evidence, not a blockchain-first claim. External anchoring is available only as an optional assurance layer.
Hash-backed
Integrity proof is based on deterministic payload hashes, ledger links, and verification envelopes.
Externally anchorable
When required, Decionis can anchor a digest outside the platform without moving the decision record out of the protocol.
Evidence layers
Each layer answers a separate audit question.
| Layer | Audit question |
|---|---|
| Policy Snapshot | What policy version and digest governed this decision? |
| Reason Codes | Why did Decionis allow, block, escalate, or require review? |
| Decision Dossier | What execution intent, evidence, and signed result were recorded? |
| Decision Chain | How did this decision fit into the workflow lineage? |
| Decision Ledger | Was the record preserved in the tamper-evident audit layer? |
| External Anchor | Was a digest notarized outside Decionis for independent proof? |
Anchor boundary
External anchoring stores proof of a digest, not the customer policy or dossier contents.
{
"anchor_request": {
"dossier_id": "33333333-3333-4333-8333-333333333333",
"ledger_entry_hash": "sha256:f0a1...",
"policy_snapshot_hash": "sha256:90b7...",
"anchor_mode": "EXTERNAL_NOTARIZATION",
"contains_customer_policy": false,
"contains_dossier_payload": false
}
}Verification
Verification starts inside Decionis and can extend outward only when external proof is requested.
| Check | Expected result |
|---|---|
| Dossier signature | Signature validates against the Decionis verification envelope. |
| Policy snapshot | Policy digest matches the policy active at decision time. |
| Chain integrity | Linked decisions preserve order and parent references. |
| Ledger integrity | Ledger entry hash matches the stored artifact digest. |
| External anchor | External notarization record matches the ledger digest when configured. |
Routes
The central protocol remains the source of truth.
| Use | Route or artifact |
|---|---|
| Decision Dossier | GET /v1/protocol/dossiers/:dossierId |
| Public verification | GET /v1/public/decision-dossiers/:dossierId/verify |
| Decision Chain | GET /v1/protocol/decision-chains/:chainId |
| Workspace ledger | GET /v1/orgs/:orgId/decision-ledger |
| Policy Snapshot | policy_snapshot on dossier and decision-evaluation payloads |
Implementation posture
Use https://api.decionis.com/v1 for central verification. Pair /docs/decision-dossier with /docs/decision-chain and /docs/policy-snapshot before adding optional external anchors.