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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9997d85a3ff5d3282e1309724a598c5a36ee3ed72b766e5c9f499775f79eb86. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4a44edb-df72-47c0-9c3c-e728b0ba9a8b.json and https://artists.proofprofile.net/proofs/artist/c4a44edb-df72-47c0-9c3c-e728b0ba9a8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).