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 0x754364b88fddb7fec3bbc6af580b925c94c6aa5b0d937ee7fd5f7ed419db7b79. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c516a935-9f49-4479-8cfb-10301fe7b893.json and https://artists.proofprofile.net/proofs/artist/c516a935-9f49-4479-8cfb-10301fe7b893.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).