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 0x431ee04f7e0945e85b7da0cef55359c037c79265f1fb4e5d1e6c7d2f86e43043. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eabbc24d-e6c2-41c1-b73d-36dce94b88b5.json and https://artists.proofprofile.net/proofs/artist/eabbc24d-e6c2-41c1-b73d-36dce94b88b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).