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 0xb0caaada8b879dba19c0dd9cabe7c63e898cfb2c74c2216c5e013c33aeebeba9. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08cd9d1a-15fa-4593-9bd8-6a03a28b34c0.json and https://artists.proofprofile.net/proofs/artist/08cd9d1a-15fa-4593-9bd8-6a03a28b34c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).