thumb|100px|Coat of arms thumb|Location of Lammi in Finland thumb|Lammi Church was built between 1490 and 1510 and was dedicated to St. Catherine of Alexandria. Lammi (, also ) is a former municipalit
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 0x2f852f1f2e1730b5b80ec6325aebf6fa34ab57a064423bf36f1005090e27ee99. 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/dadc5e49-e2a4-44b6-8c24-79f4613ccd89.json and https://artists.proofprofile.net/proofs/artist/dadc5e49-e2a4-44b6-8c24-79f4613ccd89.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).