Alfonso Sorrentino (14 March 1942 – 10 May 2015), known by the stage name Mario Da Vinci, was an Italian canzone napoletana singer and actor. Born in Naples, the son of a fisherman, during his career
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 0x20ef591f3c6572309b2671d50dab6a9750575badb4c0738032c0ecddc687d56a. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3c9fd10-8893-4aee-99f8-d2f1c3c4bf1c.json and https://artists.proofprofile.net/proofs/artist/a3c9fd10-8893-4aee-99f8-d2f1c3c4bf1c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
LA GRANDE CANZONE ITALIANA - VOGLIO AMARTI COSì
Piedigrotta e festival di Napoli, Vol. 2