Lydia Evgenevna Kavina (; born 8 September 1967) is a British-Russian theremin player, based in Oxfordshire, UK. The granddaughter of Léon Theremin's first cousin, Soviet anthropologist and primatol
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 0xb7bc5f30c2195a67b14dfe7d890101ce9d22e3b5fdbbf0311d5508e2a9bc4489. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6192d42-1f06-4315-b8fe-485691e180dc.json and https://artists.proofprofile.net/proofs/artist/d6192d42-1f06-4315-b8fe-485691e180dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music from the Ether: Original Works for Theremin
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4165a8e299d4ceae65aa998c530e5d9298f0c248248d1aff3a18c984c3cf5edd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4BP0400647.
Original Works For Theremin (Music By Martinu, Grainger, Schillinger, Kavna, Komarov And Others)
Spellbound!: Theremin Works by Grainger, Neuwirth, Rosza & Others
Waves and Strings - Theremin 100 Project
Caspar Johannes Walter: Vakuum- Halluzinationen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecfad00a4484c942b34496113f1456fc5a210f0bae23a95ecebacfdd514257f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC440506242.
Moritz Eggert: The Son Of the Daughter Of Dracula Versus The Incredible Frankenstein Monster (From Outer Space)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa507d6d8336b95b8b1f7ace79df17cce906d52c9980907ba23c79fbe572a081e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC440506247.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0xf5d7f4746db0ac8306c5a624b4f86d0f953c2d17d329c98c5b2121dfaeae6c55. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC440506248.