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 0x47003925dca0880a8dc531965fa8a7a7541e8ef8a2c29d7ae0d40c9ad6beb646. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be5c2c28-0e83-4af1-a52c-4f4ef224c57b.json and https://artists.proofprofile.net/proofs/artist/be5c2c28-0e83-4af1-a52c-4f4ef224c57b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).