Rustem Hayroudinoff
type: MusicGroup
genre: classical piano
description: Rustem Hayroudinoff () is a Russian concert pianist. Tatar by nationality, he was born in Kazan, Russian Federation (Republic of Tatarstan). His father, Afzal Hayroudinoff is a professor of Cello at t
popularity: 15
followers: 276
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additional property: CopyrightChainExplorerURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a635bcd33cf1edc980696d0bba7f9d706ddd8674c2f4a2d01c638484a65da79. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f6ea65a-2627-409e-a0ca-d34a3f847727.json and https://artists.proofprofile.net/proofs/artist/9f6ea65a-2627-409e-a0ca-d34a3f847727.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T04:44:49Z
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album: Rachmaninov Piano Sonatas 1 & 2
  type: MusicAlbum
  date published: 2017-05-26