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 0xe32135e2604fe20a512487088e5c836ca74bad33d856d908d515831f1e8a5919. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0b2781f-bdba-4834-9658-70a7cacc6dc9.json and https://artists.proofprofile.net/proofs/artist/d0b2781f-bdba-4834-9658-70a7cacc6dc9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Antologia Napoletana... na voce, na chitarra
La canzone napoletana, Vol. 1 (1537-1606)
La canzone napoletana, Vol. 5 (1839-1903)
La canzone napoletana, Vol. 9 (1916 - 1935)
La canzone napoletana, Vol. 8 (1907 - 1926)
La canzone napoletana, Vol. 4 (1825-1869)
La canzone napoletana, Vol. 2 (1707-1782)
La canzone napoletana, Vol. 10 (1926-1956)
La canzone napoletana, Vol. 7 (1888 - 1911)
La canzone napoletana, Vol. 3 (1825-1852)
La canzone napoletana, Vol. 6 (1885 - 1905)
La canzone Napoletana (Raccolta in 120 brani editi ed inediti dal 1537 ai giorni nostri - Tomo I° e Tomo II°)