07 / System Integrity

Immutable Audit Layer

Hash-linked, time-sequenced, and externally verifiable by design.

Risk outputs and reports are secured through this audit layer.

Hash-linkedTime-sequencedCryptographically signedOffline-verification capable
CHAIN VALIDBLOCK N−33a7f…d91bPREV: genesis2026-02-01 10:00:01BLOCK N−2b84e…f27cPREV: 3a7f…d91b2026-02-01 10:00:04BLOCK N−1c61d…a83ePREV: b84e…f27c2026-02-01 10:00:07BLOCK N9f3b…c14dPREV: c61d…a83e2026-02-01 10:00:10PENDINGawaiting…append-only · hash-chained · tamper-evident · ed25519 signed

Illustrative chain — demonstration purposes only

Integrity Properties
⬡Hash-linked

Every state transition appended to a hash-chained ledger. Tamper-evident and designed for immutability.

◷Time-sequenced

All events timestamped and sequenced at ingestion. Temporal order preserved and externally verifiable.

✦Independently verifiable

Ed25519 signatures and Merkle roots enable offline verification without reliance on system infrastructure.

⟳Replayable from recorded event history

Full audit replay from event log to any historical state, producing consistent, reproducible results.

Technical Specification
Ledger typeAppend-only hash chain
Signature schemeEd25519 (RFC 8032)
Merkle structureBinary Merkle tree — root embedded in every report
Proof distributionEmbedded in each signed report
Verification modeOffline-capable · No network required
Replay coverageCoverage across core risk calculations