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 0x1e2ec158a65dcd28247a02fe7f8d4ec4e7b051db0e1057d1cc9b1f0a1aac3809. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dae52dd9-33b6-435c-a4f2-0c50dd4f947c.json and https://artists.proofprofile.net/proofs/artist/dae52dd9-33b6-435c-a4f2-0c50dd4f947c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).