Observed arrival · 2026-08-27
Attest wants your receipts to outlive the store
An open standard and browser verifier for seller-signed digital purchase receipts that remain checkable offline.
Field notes
Attest packages a seller’s signed license grant with the buyer-held receipt, allowing a verifier to check issuer keys and artifact hashes without contacting a surviving service. The homepage demonstrates the flow with a fictional Nebula Games receipt and supports a replayable salt-disclosure proof for buyer binding. The project is at specification v0.1; its stated v0.2 direction includes optional transparency, anchoring, and issuer-mediated transfer records.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue