Transparency witnesses · optional assurance
More than one party can observe the same history.
Witnesses countersign privacy-safe transparency checkpoints. They never receive the document, and ordinary UDS integrity verification remains offline and witness-independent.
Public witness directory
Signature validity, operator independence, organizational identity, software diversity, and current availability are different states. Listing is not endorsement or a legal claim.
Universal Document controlled estateControlled Node witness C 1.0.0 · Node.js · Protocol 1.0Latest observation: 2026-08-30T05:12:00.000Z · Signature: VALIDIdentity: UNVERIFIED · Independence: CONTROLLED · Key control: UNVERIFIED · Infrastructure control: UNVERIFIEDCONTROLLED REFERENCE — NOT INDEPENDENTUniversal Document controlled estateControlled Node witness A 1.0.0 · Node.js · Protocol 1.0Latest observation: 2026-08-30T05:06:00.000Z · Signature: VALIDIdentity: UNVERIFIED · Independence: CONTROLLED · Key control: UNVERIFIED · Infrastructure control: UNVERIFIEDCONTROLLED REFERENCE — NOT INDEPENDENTUniversal Document controlled estateControlled black-box witness B 1.0.0 · Node.js · Protocol 1.0Latest observation: 2026-08-30T05:07:00.000Z · Signature: VALIDIdentity: UNVERIFIED · Independence: CONTROLLED · Key control: UNVERIFIED · Infrastructure control: UNVERIFIEDCONTROLLED REFERENCE — NOT INDEPENDENT 