Protocol first
Policy Snapshot, Decision Dossier, Decision Chain, and Execution Ledger evidence are the normal audit record.
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? |
| Execution 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 https://docs.decionis.com/decision-dossier with https://docs.decionis.com/decision-chain and https://docs.decionis.com/policy-snapshot before adding optional external anchors.