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 0xb94e57a5620c9d4f36631b8e546b30fa61e798fe35a29a1235b091e1a98aa742. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/725f1b22-0fde-45e9-9e16-a6eb6ec9658d.json and https://artists.proofprofile.net/proofs/artist/725f1b22-0fde-45e9-9e16-a6eb6ec9658d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).