Elsa Cavelti (4 May 1907 – 10 August 2001) was a Swiss operatic contralto and mezzo-soprano, temporarily also a dramatic soprano, who worked at German and Swiss opera houses and as an international gu
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 0x599602ccec728f7eaa5a0c017f1b85f6d2246615edf6b63641080c854badd669. Chain 2 (Bitcoin): anchored in block 953991 (2026-06-16T18:47:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ee90408-e8c3-4655-8c0c-f8f3de405bb7.json and https://artists.proofprofile.net/proofs/artist/2ee90408-e8c3-4655-8c0c-f8f3de405bb7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).