Yakov Zak
type: MusicGroup
description: thumb|Yakov Zak in 1937 Yakov Izrailevich Zak (; – 28 June 1976) was a Soviet pianist and pedagogue. People's Artist of the USSR (1966). Life Born in Odessa, Zak studied piano at the Odessa Conserva
popularity: 4
followers: 215
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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 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-17T08:10:43Z
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album: Milestones of a Legend: Sergei Prokofiev, Vol. 1
  type: MusicAlbum
  date published: 2019-04-05
album: Johannes Brahms: Piano Concerto No. 2 - Sergei Prokofiev: Piano Concerto No. 2
  type: MusicAlbum
  date published: 2010-11-01
album: J.S. Bach: Concerto for 2 Harpsichords in C Major, BWV 1061 - Beethoven: Piano Concerto No. 5 in E-Flat Major, Op. 73
  type: MusicAlbum
  date published: 2020-12-04
album: Saint-Saëns: Le carnaval des animaux
  type: MusicAlbum
  date published: 2020-06-29
album: Saint-Saens: Carnival of the Animals - Mendelssohn: Ruy Blas
  type: MusicAlbum
  date published: 2008-03-18
album: Prokofiev: Peter and the Wolf - Saint-Saëns: Carnival of the Animals
  type: MusicAlbum
  date published: 1951-01-01
album: Saint-Saëns: Les chefs-d'oeuvre - La discothèque idéale de Diapason, Vol. 23
  type: MusicAlbum
  date published: 2021-12-01
album: Rachmaninoff: Complete Operas, Cantatas & Fragments
  type: MusicAlbum
  date published: 2022-03-04
album: Emil Gilels Edition (1933-1963) [Live]
  type: MusicAlbum
  date published: 2018-04-20
album: Kyrill Kondrashin Edition (1937-1963)
  type: MusicAlbum
  date published: 2019-01-04
album: Music & Nature
  type: MusicAlbum
  date published: 2020-06-12
album: Prokofiev & Ravel: Works for Piano
  type: MusicAlbum
  date published: 2022-03-18
album: Russian Piano Music
  type: MusicAlbum
  date published: 2021-10-26
album: Piano Sonata
  type: MusicAlbum
  date published: 2021-10-12
album: Emil Gilels Edition Vol.2
  type: MusicAlbum
  date published: 2020-10-23
album: Russian Performing Art: Yakov Zak, Piano
  type: MusicAlbum
  date published: 2010-01-01
album: The Russian Piano Tradition: The First Soviet Recordings (Recorded 1947-1955)
  type: MusicAlbum
  date published: 2007-05-01
album: The Russian Piano Tradition: Emil Gilels & Yakov Zak
  type: MusicAlbum
  date published: 2006-03-01
album: The Carnival of Animals
  type: MusicAlbum
  date published: 2006-06-08
  track: Introduction and Royal March of the Lion
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    by artist: Emil Gilels
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    by artist: Yakov Zak
    by artist: State Symphony Orchestra of the USSR
    by artist: Camille Saint-Saëns
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      date published: 2006-06-08
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      value: 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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-30T14:44:50Z
    audio: Introduction and Royal March of the Lion
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  track: Hens and Cocks
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    by artist: Karl Eliasberg
    by artist: Yakov Zak
    by artist: Daniil Shafran
    by artist: Camille Saint-Saëns
    by artist: Emil Gilels
    by artist: State Symphony Orchestra of the USSR
    in album: The Carnival of Animals
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      date published: 2006-06-08
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    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Hens and Cocks
  track: Wild Jackasses
  track: Tortoises
  track: Aquarium
  track: The Swan
album: Fryderyk Chopin: Best Mazurka Performances 1927-2015
album: Emil Gilels 100, Vol. 32 (Live)
album: Oeuvres de Bach, Liszt, Mozart, Rameau, Scarlatti & Schumann (Les indispensables de Diapason)
album: Saint-Saëns: The Carnival of the Animals, R. 125 - Prokofiev: Peter and the Wolf, Op. 67 (Remastered 2023)
album: Kurt Sanderling - The Soviet Recordings: Brahms & Schumann
album: Prokofiev: Piano Concertos No. 2 & No. 4

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OTSVerificationAPI
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OTSTimestamp
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OTSVerifyInstructions
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value: 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

OpenTimestamps Proof of Existence
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encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09a41ce1f9d582f223f7ddcc9fc3241e59b46c94b9c81e8efdb41ad7eacf965. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFX30600769 — a six-check JSON result.
date published: 2026-07-31T18:48:12Z

Hens and Cocks
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Wild Jackasses
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duration: PT0M38S
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by artist: Karl Eliasberg
by artist: Emil Gilels
by artist: Daniil Shafran
by artist: State Symphony Orchestra of the USSR
by artist: Yakov Zak
by artist: Camille Saint-Saëns
in album: The Carnival of Animals
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  date published: 2006-06-08
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additional property: OTSVerifyInstructions
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  value: 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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776e1aaa0d756b3f0788016d6a44ed69ad6ed203c397a29f9de175a140312516. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFX30600770 — a six-check JSON result.
  date published: 2026-07-31T13:06:57Z
audio: Wild Jackasses
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  additional property: Acousticness
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Tortoises
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by artist: State Symphony Orchestra of the USSR
by artist: Yakov Zak
by artist: Emil Gilels
by artist: Camille Saint-Saëns
by artist: Daniil Shafran
in album: The Carnival of Animals
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T15:59:18Z
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Aquarium
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by artist: Yakov Zak
by artist: State Symphony Orchestra of the USSR
by artist: Emil Gilels
by artist: Camille Saint-Saëns
by artist: Daniil Shafran
in album: The Carnival of Animals
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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  value: 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T02:51:48Z
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Fryderyk Chopin: Best Mazurka Performances 1927-2015
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Emil Gilels 100, Vol. 32 (Live)
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Oeuvres de Bach, Liszt, Mozart, Rameau, Scarlatti & Schumann (Les indispensables de Diapason)
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Saint-Saëns: The Carnival of the Animals, R. 125 - Prokofiev: Peter and the Wolf, Op. 67 (Remastered 2023)
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Kurt Sanderling - The Soviet Recordings: Brahms & Schumann
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Prokofiev: Piano Concertos No. 2 & No. 4
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