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 0x4a5061841b58cadb6b6b3ca69616cb096d0293ab188cfc31ab19429395bba1cc. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fef3d29b-4075-40c7-b5c5-e6beb36d7c4b.json and https://artists.proofprofile.net/proofs/artist/fef3d29b-4075-40c7-b5c5-e6beb36d7c4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).