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 0xa433087a01598b96e166527205604a44b47bf887022910006949bbfc0ce7cac6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef51dbaa-b27e-4ad5-9b7f-58bf96ec627a.json and https://artists.proofprofile.net/proofs/artist/ef51dbaa-b27e-4ad5-9b7f-58bf96ec627a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Uncertainty - Lukas Termena's Balearic Remix