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 0xbd7c054d4f2d2b5a7bda9545ec73eb676a5cea8c1213e735e469815a657f9329. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0abf0d9-a18d-4c0c-83a2-bf0740e0403d.json and https://artists.proofprofile.net/proofs/artist/b0abf0d9-a18d-4c0c-83a2-bf0740e0403d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).