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 0x4d38e5b4ecd8c6d6e1ec4763198b815759b5b7b01e3671704fd9da8950a4e6e3. 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/a385cf1e-cd52-4d38-a42c-2b1f5af8e6b3.json and https://artists.proofprofile.net/proofs/artist/a385cf1e-cd52-4d38-a42c-2b1f5af8e6b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).