Annunzio Paolo Mantovani (; 15 November 1905 – 30 March 1980) was an Italian British conductor, composer and light orchestra–styled entertainer with a cascading strings musical signature. The book Br
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 0xcfde2ec7fd1d48d9b03dabde03e6bec915123a262a2fd400533190c22f6a8d8d. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/986efd2d-6cbe-4094-ad3c-b1873915a283.json and https://artists.proofprofile.net/proofs/artist/986efd2d-6cbe-4094-ad3c-b1873915a283.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).