alt=Large roll-on roll-off ferry carrying passengers and vehicles across open water|thumb|Passenger and vehicle ferry in coastal waters A ferry is a boat or ship that transports passengers, and occasi
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1891128e384b5fb767b8f95beb53e976c8300d4b8d170ae3cdcd423400fc998. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b988046-2f9b-456b-bb4c-2c21108f8741.json and https://artists.proofprofile.net/proofs/artist/9b988046-2f9b-456b-bb4c-2c21108f8741.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).