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 0x246273bf1d92058ba1c9f73102a3f44e4b525e4af584dff1c41219aa59e0c925. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/337b2b03-9f7f-4efb-8c32-2cd32a5456b8.json and https://artists.proofprofile.net/proofs/artist/337b2b03-9f7f-4efb-8c32-2cd32a5456b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Light Under the Sea - Organ Mug Version