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 0x3add380723f8eb8cdc6ef81b9c66ec7b493d66d12726880eb1ffc913a4f1ee42. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0133e4b8-5f09-43d9-952a-cc0540ae4689.json and https://artists.proofprofile.net/proofs/artist/0133e4b8-5f09-43d9-952a-cc0540ae4689.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).