Eva Dell'Acqua (also Dall'Acqua, 28 January 1856, Schaerbeek12 February 1930, Ixelles) was a Belgian singer and composer of Italian ancestry. She wrote fifteen operas and operettas, as well as orchest
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 0xf5d9f552bdc4d7c594bc13939e77609220272f8f41ed2b251d82e97b1da1f40b. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f56722e-e6f3-46f1-a482-7a4b4d6a087c.json and https://artists.proofprofile.net/proofs/artist/1f56722e-e6f3-46f1-a482-7a4b4d6a087c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).