240px|thumb|A late-17th-century engraving done after Jan-Erasmus Quellinus' portrait of Alessandro Poglietti (the original painting is lost). Alessandro Poglietti (early 17th century – July 1683) was
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 0xcfbb69849a5a11ceb0af197fa6010e4292a447ee40c16b25fea23984a639e192. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faa65a78-bd55-4aaf-b222-154aed625dff.json and https://artists.proofprofile.net/proofs/artist/faa65a78-bd55-4aaf-b222-154aed625dff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Das italienische Seicento: Serie C. Die Toccata (Mono Version)
Poglietti : 12 Ricercari (Organo Nacchini - Dacci, 1752, Chiesa parrocchiale di Madrisio, Udine, Italy)
Poglietti: Il Rossignolo - Suite Sopra la Ribellione di Ungheria