thumb|Logo of the French Republic "", French for "liberty, equality, fraternity" A motto (derived from the Latin , 'mutter', by way of Italian , 'word' or 'sentence') is a sentence or phrase expressi
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 0x75d58e5172dd0c9c437e8d380ecb09ad33c38870f62afe651a15a910d237a0c9. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04646c9d-8b80-4ee9-a3ee-83a58acf1624.json and https://artists.proofprofile.net/proofs/artist/04646c9d-8b80-4ee9-a3ee-83a58acf1624.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).