thumb|The four canines, or fangs, of a domestic cat. (The largest two teeth of the top and bottom rows of teeth.) A fang is a long, pointed tooth. In mammals, a fang is a modified maxillary tooth, us
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b53fa9448d9f28b3431a2a6cf19f4fbb739a73a26f51976a72fb78bbc93cf0. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75175154-2cfb-413d-8d11-d9190691242f.json and https://artists.proofprofile.net/proofs/artist/75175154-2cfb-413d-8d11-d9190691242f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).