{"issuer":"https://tokenzero.sh","keys":[{"kid":"ae3jyGdg2kH6wJne","use":"sig","alg":"EdDSA","kty":"OKP","crv":"Ed25519","x":"U012iG2cqkb1Q8E3efDLH6s9o2p2ywTrOIOAP5Kc8Sc"}],"receipt_format":"Ed25519 over canonical JSON (sorted keys, no whitespace) of the receipt object","chain":"each receipt carries seq and prev_receipt_hash = sha256(previous signature); GET /v1/ledger/chain returns a verifiable run","verify_endpoint":"https://tokenzero.sh/v1/ledger/verify"}