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 0xbdf88ab804f8e77ef9bd344f67cd70f1c4250a9e6c9037802337522225d5f243. 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/f0aa2692-f5d5-4577-b7c1-24e87f1e1d65.json and https://artists.proofprofile.net/proofs/artist/f0aa2692-f5d5-4577-b7c1-24e87f1e1d65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).