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 0xb5e5c42631ba13806d4e81aa7b4dc2a71dafa1c470fc9512df3d15c27bdad5d5. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/365dadb0-b303-4a42-8130-f6a3b5cd9fa9.json and https://artists.proofprofile.net/proofs/artist/365dadb0-b303-4a42-8130-f6a3b5cd9fa9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).