thumb|Manor house of the Moniuszko family in Ubiel, sketch by Napoleon Orda created between 1864–1876 Stanisław Moniuszko (; May 5 (17), 1819 – June 4, 1872) was a Polish composer, conductor, organist
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 0x18494526321a8b07dca106aa60bced7dc547a4981b9711bc8ef93462ff4f84ff. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c51825a8-4a94-4c04-ae84-f6ac6193221a.json and https://artists.proofprofile.net/proofs/artist/c51825a8-4a94-4c04-ae84-f6ac6193221a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stanisław Moniuszko: "Verbum nobile" - Opera In One Act
Stanisław Moniuszko: "Hrabina" - Opera w trzech aktach.