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 0xc75cf0c4c3fd5134864845f64a37cd1756a9e49a2a5b450aea0a0d9182b685e1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f812e8c-4bda-43e0-b15b-079fbea9a4b4.json and https://artists.proofprofile.net/proofs/artist/9f812e8c-4bda-43e0-b15b-079fbea9a4b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).