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 0x131957dad4d33b766273cc8c75ba8071bb9f70de3f12f72ab6c8f9cbd138e0eb. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/758f17ab-6ea3-47d3-8cf3-fc837934027a.json and https://artists.proofprofile.net/proofs/artist/758f17ab-6ea3-47d3-8cf3-fc837934027a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).