This page polls the two ledgers and the authority's status endpoint from your browser and renders what it reads: the same public evidence the verifier consumes, nothing computed here and nothing written anywhere. When the buyer bought from a seller of another operator, that seller's own public list of purchases is read too (its /ledger, a plain list in its own form) and its line for the checkout session lights the payment boxes; the buyer's sealed receipt is where that purchase is verified. A step turns green when its entry appears, never before. A replay plays recorded entries back and says so on screen; it is never shown as live. Polling pauses while this tab is hidden and resumes, with a fresh read, when it is shown again. Override the feeds with ?seller=…&buyer=…&authority=…, pin a transaction with ?correlation=…, hide older transactions from the picker with ?since=2026-09-10, or read faster or slower with ?interval=1000 (milliseconds; every read is a request against the ledger being watched).