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 0xd8a3cd296cc8c1d3636adc778a34b2482f695c6f7ccc01dcfa54d47dc65788d2. 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/fd279d1f-2d9e-42a6-82d0-b0e24b50be67.json and https://artists.proofprofile.net/proofs/artist/fd279d1f-2d9e-42a6-82d0-b0e24b50be67.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).