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 0x10ffe3a8eeb55d41c99574b45b6770bbe0db8b5d7f33e858193cfcfa35e86b7a. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ff5a63b-6e38-4c25-be5c-24723c47bca2.json and https://artists.proofprofile.net/proofs/artist/0ff5a63b-6e38-4c25-be5c-24723c47bca2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).