25.0Immutable Ledger

Write once, alter never.

The Immutable Ledger records every decision in a write-once, tamper-evident history. Each entry is hashed and chained to the one before it, so records cannot be altered, deleted or reordered without detection.

Tamper-evident by construction

25.1

Every decision is hashed and linked to its predecessor. Changing any earlier record would break the chain, which makes silent edits detectable rather than possible.

  • Each entry hashed and chained to the last
  • Reordering or deletion breaks verification
  • Detection is built in, not bolted on

A complete history

25.2

The ledger holds the full record of what was authorised, escalated or blocked, so the history of an agent's behaviour is always available to look back on.

  • Every allow, escalate and block recorded
  • The verdict and reasoning kept with the decision
  • Nothing overwritten as new events arrive

Verifiable offline

25.3

Because records are signed and chained, they can be verified independently, without trusting the system that produced them.

More in Provenance & Proof.

Related capabilities on the same authorisation layer. Every one is enforced before an action runs and sealed to the Provenance Vault.

1.0Proof of Authorisation

Show the receipt for every action.

Learn more
2.0Audit Exports

Hand over proof, not screenshots.

Learn more
3.0Forensic Reporting

Reconstruct exactly what happened.

Learn more

See Immutable Ledger in your workflow.

Put one workflow behind Xybern and watch every agent action authorised, and sealed to the vault.