Maria Carbone (15 June 1908 – 28 December 2002) was an Italian operatic soprano. She created the lead female roles in two of Gian Francesco Malipiero's operas: the title role in Ecuba (11 January 1941
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb836b8a30bce584916a4c4457c64d7019c5701e455b6a7bd8133951b6d81b65a. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aeac4094-55e0-46c3-934d-0cb979bb648d.json and https://artists.proofprofile.net/proofs/artist/aeac4094-55e0-46c3-934d-0cb979bb648d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.