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 0xa1a3641815c2a65afc253cdb9a9def91e9e3077b0cb8adfe4b0850c6c23ae8ad. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f351d6e6-193a-42f9-ac3c-ba08a9b9b4e4.json and https://artists.proofprofile.net/proofs/artist/f351d6e6-193a-42f9-ac3c-ba08a9b9b4e4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).