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type: MusicGroup
genre: opera
popularity: 2
followers: 29
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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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  date published: 2026-06-17T08:11:48Z
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album: Borodin: Prince Igor
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  date published: 2012
  track: Prince Igor, Prologue: Introduction "Knyzya, pora nam vystupat"
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    by artist: Alexander Borodin
    by artist: Иван Петров
    by artist: Артур Эйзен
    by artist: Владимир Атлантов
    by artist: Valery Yaroslavtsev
    by artist: Konstantin Baskov
    by artist: хор Большого театра
    by artist: Mark Ermler
    by artist: Оркестр Большого театра
    in album: Borodin: Prince Igor
      type: MusicAlbum
      date published: 2012
    popularity: 2
    genre: classical
    genre: late-romantic-era
    genre: early-modern-classical
    genre: russian-romanticism
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
      type: PropertyValue
      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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T03:53:27Z
    audio: Prince Igor, Prologue: Introduction "Knyzya, pora nam vystupat"
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  track: Prince Igor, Prologue: Introduction "Pust pridut knyagini i boyaryni"
  track: Prince Igor, Act II: Prince Igor's Aria "Ni sna, ni otdykha"
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    duration: PT6M51S
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    by artist: Иван Петров
    by artist: Mark Ermler
    by artist: Оркестр Большого театра
    in album: Borodin: Prince Igor
      type: MusicAlbum
      date published: 2012
    popularity: 1
    genre: classical
    genre: late-romantic-era
    genre: early-modern-classical
    genre: russian-romanticism
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    additional property: OTSVerifyInstructions
      type: PropertyValue
      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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T08:56:20Z
    audio: Prince Igor, Act II: Prince Igor's Aria "Ni sna, ni otdykha"
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  track: Prince Igor, Act I Scene 1: Recitative "Knyazyu Galitskomu slava!"
  track: Prince Igor, Act I Scene 1: Scene "Stoy, rebyata, slukhay!"
  track: Prince Igor, Act II: Polovtsian Dance with Chorus "Uletay na krylyakh vetra"
  track: Prince Igor, Act I Scene 2: Yaroslavna's Arioso "Nemalo vremeni proshlo"
  track: Prince Igor, Act I: Finale "Dobro pozhalovat, boyare"
  track: Prince Igor, Act I Scene 2: Yaroslavna and Maidens Scene "Tam devushki prishli"
album: Mussorgsky: Khovanshchina
album: Rimsky-Korsakov: Complete Operas & Fragments
album: Tchaikovsky: Complete Romances
album: Римский-Корсаков: Млада
album: Tchaikovsky: Eugene Onegin
album: Prokofiev: Semyon Kotko (Mono Version)

Prince Igor, Prologue: Introduction "Pust pridut knyagini i boyaryni"
type: MusicRecording
duration: PT8M8S
duration ms: 488481
explicit: false
by artist: Alexander Borodin
by artist: Иван Петров
by artist: Tatiana Tugarinova
by artist: Владимир Атлантов
by artist: Артур Эйзен
by artist: хор Большого театра
by artist: Mark Ermler
by artist: Оркестр Большого театра
in album: Borodin: Prince Igor
  type: MusicAlbum
  date published: 2012
popularity: 2
genre: classical
genre: late-romantic-era
genre: early-modern-classical
genre: russian-romanticism
isrc code: UK2Y21602941
additional property: CopyrightID
additional property: CopyrightStatus
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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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additional property: ProofProfileEvidenceStatus
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Prince Igor, Prologue: Introduction "Pust pridut knyagini i boyaryni"
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Prince Igor, Act I Scene 2: Yaroslavna's Arioso "Nemalo vremeni proshlo"
type: MusicRecording
duration: PT9M21S
duration ms: 561745
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by artist: Alexander Borodin
by artist: Tatiana Tugarinova
by artist: Mark Ermler
by artist: Оркестр Большого театра
in album: Borodin: Prince Igor
  type: MusicAlbum
  date published: 2012
popularity: 2
genre: classical
genre: late-romantic-era
genre: early-modern-classical
genre: russian-romanticism
isrc code: UK2Y21602949
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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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additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Prince Igor, Act I Scene 2: Yaroslavna's Arioso "Nemalo vremeni proshlo"
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Prince Igor, Act I: Finale "Dobro pozhalovat, boyare"
type: MusicRecording
duration: PT8M59S
duration ms: 539467
explicit: false
by artist: Alexander Borodin
by artist: Tatiana Tugarinova
by artist: хор Большого театра
by artist: Mark Ermler
by artist: Оркестр Большого театра
in album: Borodin: Prince Igor
  type: MusicAlbum
  date published: 2012
popularity: 1
genre: classical
genre: late-romantic-era
genre: early-modern-classical
genre: russian-romanticism
isrc code: UK2Y21602952
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Prince Igor, Act I: Finale "Dobro pozhalovat, boyare"
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Prince Igor, Act I Scene 2: Yaroslavna and Maidens Scene "Tam devushki prishli"
type: MusicRecording
duration: PT4M24S
duration ms: 264654
explicit: false
by artist: Alexander Borodin
by artist: Irina Terpilovskaya
by artist: Tatiana Tugarinova
by artist: хор Большого театра
by artist: Mark Ermler
by artist: Оркестр Большого театра
in album: Borodin: Prince Igor
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popularity: 2
genre: classical
genre: late-romantic-era
genre: early-modern-classical
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  date published: 2026-07-31T23:30:38Z
audio: Prince Igor, Act I Scene 2: Yaroslavna and Maidens Scene "Tam devushki prishli"
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Danceability
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Energy
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Speechiness
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Prince Igor, Act I Scene 1: Recitative "Knyazyu Galitskomu slava!"
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duration: PT1M11S
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by artist: Alexander Borodin
by artist: Артур Эйзен
by artist: хор Большого театра
by artist: Mark Ermler
by artist: Оркестр Большого театра
in album: Borodin: Prince Igor
  type: MusicAlbum
  date published: 2012
popularity: 1
genre: classical
genre: late-romantic-era
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Prince Igor, Act I Scene 1: Recitative "Knyazyu Galitskomu slava!"
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Prince Igor, Act I Scene 1: Scene "Stoy, rebyata, slukhay!"
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duration: PT0M50S
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by artist: Konstantin Baskov
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by artist: хор Большого театра
by artist: Mark Ermler
by artist: Оркестр Большого театра
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  type: MusicAlbum
  date published: 2012
popularity: 1
genre: classical
genre: late-romantic-era
genre: early-modern-classical
genre: russian-romanticism
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Prince Igor, Act I Scene 1: Scene "Stoy, rebyata, slukhay!"
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Prince Igor, Act II: Polovtsian Dance with Chorus "Uletay na krylyakh vetra"
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duration: PT3M45S
duration ms: 225933
explicit: false
by artist: Alexander Borodin
by artist: хор Большого театра
by artist: Mark Ermler
by artist: Оркестр Большого театра
in album: Borodin: Prince Igor
  type: MusicAlbum
  date published: 2012
popularity: 6
genre: classical
genre: late-romantic-era
genre: early-modern-classical
genre: russian-romanticism
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T11:02:43Z
audio: Prince Igor, Act II: Polovtsian Dance with Chorus "Uletay na krylyakh vetra"
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Mussorgsky: Khovanshchina
type: MusicAlbum
date published: 2011-01-01

Rimsky-Korsakov: Complete Operas & Fragments
type: MusicAlbum
date published: 2020-09-18

Tchaikovsky: Complete Romances
type: MusicAlbum
date published: 2015-04-28

Римский-Корсаков: Млада
type: MusicAlbum
date published: 2011-01-01
track: Млада: Вступление
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  by artist: Grand Symphony Orchestra of All-Union National Radio Service and Central Television Networks
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    date published: 2026-07-02T03:30:09Z
  audio: Млада: Вступление
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Tchaikovsky: Eugene Onegin
type: MusicAlbum
date published: 2009-11-10

Prokofiev: Semyon Kotko (Mono Version)
type: MusicAlbum
date published: 1900-01-01