Forensic Continuity Tier

Audit Ledger

The Audit Ledger is a core QUORUM subsystem defining the hard boundary of decision reality. It is an append-only, cryptographically immutable store that captures the absolute state of every decision resolved by the system.

Deterministic Reconstruction

Unlike standard logging, QUORUM treats audit as a first-class execution primitive. Every decision trace is designed for total reconstruction, enabling forensic analysts to replay historical events through the exact logic environment of the original resolution.

Retrieve event input state from the Ingestion Layer at the exact epoch of the original session.

Reconstruct the precise policy and rule version snapshot active during the decision window.

Re-execute model scoring using the versioned weight sets and feature parameters associated with the event ID.

Replay the arbitration and decision resolution logic nodes as defined in the DAG of that epoch.

Validate the final replayed decision against the immutable ledger hash to confirm integrity.

// PERSISTENCE_SCHEMA_v2 TYPE: WORM_LEDGER

EVENT_BLOCK {

header: { id: "01HXY...", ts: "171579..." }

payload: { raw: 0x9f1e..., enc: "AES-256" }

state: { rule_ver: 82, model_ver: 102 }

signature: "ED25519_SIG_..."

}

Integrity Check

Merkle Path Valid

System Guarantees

Append-only integrity

Ledger entries cannot be modified, re-ordered, or deleted after creation. Every entry is chained to its predecessor, ensuring a contiguous timeline.

Deterministic replay

Historical decisions can be reproduced exactly under identical state conditions. Replayability is built into the core execution engine.

Policy binding

Every decision is permanently and cryptographically tied to the specific governing rule set version used for arbitration.

Cross-system consistency

The Audit Ledger maintains consistent forensic semantics across all deployment environments (Cloud, Hybrid, and Sovereign).

07.1 // Concerned Segregation

CAPTURE

Sub-1ms Write

POLICY

Versioned Map

MODEL

Weight Sign

ARBITRATE

Logic Trace

EXECUTE

Enforced Signed