1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc783800ab77450012ee7f30ecdd6fe9ce8ff90e85f86e7018a40d7186234bce6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8048c903-5e51-49df-8d65-407e845417bc.json and https://artists.proofprofile.net/proofs/artist/8048c903-5e51-49df-8d65-407e845417bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Giant’s Causeway (Finn McCool vs. Benandonner)