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 0x28682d3f242e099efb0df34856fec84fdb8fa22b20cd1bcaf0829a1f9dd9f00f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f395d431-e876-4a16-a134-e4c9ab3df9d7.json and https://artists.proofprofile.net/proofs/artist/f395d431-e876-4a16-a134-e4c9ab3df9d7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).