Polina Olegovna Osetinskaya (; 11 December 1975) is a Russian pianist. Biography Osetinskaya was born in Moscow on 11 December 1975 to cinematographer (1937–2020). She began playing the piano at the
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 0xa2bc061c9c51895cd464b01c6a391d3fdb9b74cfaa6315859f3a88eaa45cad84. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63eb278b-1bd3-4220-ac8c-95bdbdb957fd.json and https://artists.proofprofile.net/proofs/artist/63eb278b-1bd3-4220-ac8c-95bdbdb957fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Osetinskaya Plays Rachmaninoff & Prokofiev
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 0x4dae7357132c6bdd334c7b2a3a3ebcf700e7f7eb70b2089eb7721957ff5a4f3c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBGCS1500035.
Lullaby - From the Film Breathing In - Breathing Out
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6779753be8fcc1f33ada22237d530700922c1eb127a5d3b39e6cf437951615. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:09:49Z), 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/GBGCS1500038.