Eva Děpoltová (5 August 1945 – 16 July 2017Zomrela sopranistka Eva Děpoltová. Bývalá sólistka Opery SND) was a Czech operatic soprano. She recorded the title role in Šárka (Fibich) opposite tenor :cs
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 0x31301dd46ed5294e7f8ebdb9f2149e461beed23a40e3876503c0699ada6f99c2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/895b01a9-dbc5-45d3-97a4-d9dcfcd86921.json and https://artists.proofprofile.net/proofs/artist/895b01a9-dbc5-45d3-97a4-d9dcfcd86921.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Martinů: Les Jeux de Marie, Cycle of 4 Operas