{"issuer":"MINIMALAI","receipt_key_ed25519":"a7c055af11a2fb55353267154cda27b8e824b54b50ca26e51734f5cec3f1f2d2","receipt_format":"RECEIPTS v1","receipt_spec":"sha256 over canonical JSON (sorted keys, no spaces); Ed25519 over canonical receipt without 'sig'","receipt_spec_url":"https://github.com/miinimal/gram402/blob/main/RECEIPTS.md","receipt_id":"sha256 of canonical record without 'sig'","disputes":{"open":"POST /v1/disputes","status":"GET /v1/disputes/receipt/{receipt_id}","chain":"GET /v1/disputes/chain"},"key_pinning":"the key is also written on-chain in every daily TON anchor comment (see /v1/receipts/chain ton_anchor)"}