250px|right|thumb|Japanese popular mushrooms, clockwise from left, enokitake, buna-shimeji, bunapi-shimeji, king oyster mushroom and shiitake (front). thumb|Lyophyllum shimeji thumb|Bunapi (developed
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 0x51699bb5b979ec576efa327d58b6697b44ede09130499165d87f04ee56279d07. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd4d925c-8c5b-4cbb-ad5b-2be6df0f5c86.json and https://artists.proofprofile.net/proofs/artist/bd4d925c-8c5b-4cbb-ad5b-2be6df0f5c86.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).