thumb|Statue of Eloquence at the Palais du parlement de Bretagne, Rennes Eloquence (from French eloquence from Latin eloquentia) is the quality of speech or writing that is marked by fluency, elegan
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9786c972fa6e0944ff8027bfa166d5630f0aaa75c5ccf44e5c2555ebe1d05c74. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b315f216-90c3-4ad0-aa9f-623515a2ffa7.json and https://artists.proofprofile.net/proofs/artist/b315f216-90c3-4ad0-aa9f-623515a2ffa7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).