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 0x6d4336d6ff26c7f9d1e8f8ae870bc699282e604d9347182a1110db9be6f890b7. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fd1db87-86cf-46d8-af23-e4fc77f0fd6f.json and https://artists.proofprofile.net/proofs/artist/3fd1db87-86cf-46d8-af23-e4fc77f0fd6f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Floor Below (feat. Arthur Zhostky & Nikita Solovyov)