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 0x0f3ef376b21a400b528c11b6bc672817b81f2dbbbf9ca1d71520e8be9b7f4177. 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/f900dff6-ab7a-406a-bb62-5e1f02913f7a.json and https://artists.proofprofile.net/proofs/artist/f900dff6-ab7a-406a-bb62-5e1f02913f7a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).