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 0x5d805d95035ee9b62f25d5d8785f6fffe93b7d617d59855d8e89944573fe565f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb07e513-e23d-45f0-b4c0-bbf9b136a8f8.json and https://artists.proofprofile.net/proofs/artist/cb07e513-e23d-45f0-b4c0-bbf9b136a8f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).