thumb|Map of Limerick Limerick ( ; ) is a city in western Ireland, in County Limerick. It is in the province of Munster and is in the Mid-West which comprises part of the Southern Region. With a pop
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 0x42cb71fc5e6efd7293d3aaa3f3d3d05eea28b0b396682c2a2eb7efc7ba179823. Chain 2 (Bitcoin): anchored in block 953970 (2026-06-16T16:09:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a3893c1-b4dd-4b51-af10-c1b3ca5ed839.json and https://artists.proofprofile.net/proofs/artist/2a3893c1-b4dd-4b51-af10-c1b3ca5ed839.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).