thumb|A wood sorrel, often called a shamrock, especially in the United States A shamrock is a type of clover, used as a symbol of Ireland. The word shamrock comes from Irish (), which is the diminut
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 0x1f9bac348ecd12fc35b0f599e88e7358efccbd1d59dbbc172ea3c9bc81fe969c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7282b3e-03c0-4b3a-a08d-b67a7fb80b37.json and https://artists.proofprofile.net/proofs/artist/c7282b3e-03c0-4b3a-a08d-b67a7fb80b37.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).