Partenope (Parthenope), HWV 27, is an opera by George Frideric Handel, first performed at the King's Theatre in London on 24 February 1730. Although following the structure and forms of opera seria, t
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 0x71ae7af03e925fc0e557fd41c94e45d98c5d7b546bc4c82a20d44c58b74fbcb9. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4895ac48-32cc-42dd-8715-714b616b0c33.json and https://artists.proofprofile.net/proofs/artist/4895ac48-32cc-42dd-8715-714b616b0c33.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).