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 0x3dffd08eef4aa893165e397b96a6aea6fb9ca623ef263e9ca4019b2a2a357d35. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a7c120f-0b04-4ca4-af64-80e5c2c5c3ba.json and https://artists.proofprofile.net/proofs/artist/6a7c120f-0b04-4ca4-af64-80e5c2c5c3ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hereafter [feat. shully] - Myosuke Remix