Temporal Trust

Non-normative summary. The canonical requirements are in the Temporal Trust specification.

Trust assessments can change after an acquisition, domain transfer, key compromise, or change in practice. A trust bundle therefore records assessments as time-bounded, optionally scoped periods rather than as one mutable status.

For an issuer with an applicable trust-bundle entry, a verifier computes:

• the historical status at the attestation's issued_at time; and
• the current status at verification time.

Both results matter. A later caution status does not erase an earlier trusted period, and an earlier trusted period does not hide a current caution status. Scope also matters: a current period scoped to political claims does not automatically apply to a publication claim outside that scope.

For an attestation issued during a previously trusted period, the catalogue can require:

• ⓘ Published during previously trusted period
• ⚠ Source currently marked {current status} by selected trust bundle

For an attestation issued during a high_caution period, it can require:

• ⚠ Source marked high caution by selected trust bundle
• ⚠ Claim is made by issuer, not proven as true

These are trust-bundle interpretations. Signature validity, issuer identity, asset integrity, and chronology remain separate results. Exact label conditions and wording are defined in the UI Labels specification.