thumb|250px|Dolosse forming a protective structure against a shoreline in Cape Town, South Africa. A dolos (plural: dolosse) is a wave-dissipating concrete block used in great numbers as a form of co
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 0xb70cc365094c4fc8bffa72a72fcfece07e4d2c1d8a4aec2eae9d2555e1581acb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/541416a9-bd40-4707-95f5-c54d9e618b14.json and https://artists.proofprofile.net/proofs/artist/541416a9-bd40-4707-95f5-c54d9e618b14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).