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 0x6752e827df58c3ddf64d5b9c258f9b913ecd317d98b8402c8cedb5bbf5a7d31e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9c43daf-04f8-4be0-9f2d-6f75d890201d.json and https://artists.proofprofile.net/proofs/artist/b9c43daf-04f8-4be0-9f2d-6f75d890201d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).