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 0xa58a8b1a9fe8241d17053db3b0b011d36d53e295947abf5fb6ac21fa6eccc19b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b41e13cc-5172-45bf-b055-08d00e8dd4b4.json and https://artists.proofprofile.net/proofs/artist/b41e13cc-5172-45bf-b055-08d00e8dd4b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).