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 0x220584d9aeb3748832f6296799646e38e1495e62ba87f435d9ddece0215e7cc1. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb2fc72e-0ee7-489d-b4cf-d53cb330bbe5.json and https://artists.proofprofile.net/proofs/artist/fb2fc72e-0ee7-489d-b4cf-d53cb330bbe5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).