Q markBridgeBoundary Observatory

Proof and receipts

Proof Surfaces

Bridge receipts are boundary facts. They can prove a crossing event, refusal, timeout, or delivery label, but not universal meaning.

Public evidence categories

Bridge proof pages should make the category visible before any live route opens.

Lane

Source, destination, enabled or paused posture, and route class can become public labels when safe.

Finality

Public labels can describe finality posture without exposing thresholds or private timing.

Proof

Public proof status can say staged, pending, verified, refused, expired, or unavailable when backed by a safe source.

Receipt

Receipts show what happened at the boundary: accepted, delivered, refused, timed out, or quarantined.

Quarantine

Unsupported or unclear inbound material stops at the border until the receiving chain decides meaning.

Replay

Replay posture belongs in public labels only when it can be described without exposing exploit procedure.