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track: Eugene Onegin (Act 1, Scene 2, continued): Chorus of serf maidens: Maidens, beauties
track: Eugene Onegin (Act 1, Scene 2, continued): Tatyana: He's here...and aria of Onegin: If I should ever wish
track: Eugene Onegin, Op. 24, Act II: Lensky: "Have I really deserved this..."and Couplets of Triquet
track: Eugene Onegin, Op. 24, Act II: Final; Lensky: "In your house!"
track: Eugene Onegin (Act 1, Scene 2, continued): Letter scene
track: Eugene Onegin (Act 1, Scene 2, continued): Duet; Tatyana: "Oh, the night has passed..."
track: Eugene Onegin, Op. 24, Act II: Entr'acte and Waltz with chorus
track: Eugene Onegin, Op. 24, Act II: Mazurka
track: Eugene Onegin, Op. 24, Act II: Introduction, Zaretsky: "Well, it seems..."

Eugene Onegin (Act 1, Scene 2, continued): Chorus of serf maidens: Maidens, beauties
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by artist: Pyotr Ilyich Tchaikovsky
by artist: Sofia Festival Orchestra
by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Rossita Troeva-Mircheva
by artist: Nicolai Gedda
by artist: Michel Lecocq
by artist: Yuri Mazurok
by artist: Anna Tomowa-Sintow
by artist: Nicola Ghiuselev
by artist: Stoil Georgiev
by artist: Emil Tchakarov
by artist: Sofia National Opera Chorus
in album: Tchaikovsky: Eugene Onegin
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  date published: 2026-07-08T03:39:04Z
audio: Eugene Onegin (Act 1, Scene 2, continued): Chorus of serf maidens: Maidens, beauties
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Eugene Onegin (Act 1, Scene 2, continued): Tatyana: He's here...and aria of Onegin: If I should ever wish
type: MusicRecording
duration: PT8M30S
duration ms: 510933
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
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by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Rossita Troeva-Mircheva
by artist: Nicolai Gedda
by artist: Michel Lecocq
by artist: Yuri Mazurok
by artist: Anna Tomowa-Sintow
by artist: Nicola Ghiuselev
by artist: Stoil Georgiev
by artist: Emil Tchakarov
by artist: Sofia National Opera Chorus
in album: Tchaikovsky: Eugene Onegin
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additional property: OTSVerifyInstructions
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  date published: 2026-07-08T08:56:20Z
audio: Eugene Onegin (Act 1, Scene 2, continued): Tatyana: He's here...and aria of Onegin: If I should ever wish
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Eugene Onegin, Op. 24, Act II: Lensky: "Have I really deserved this..."and Couplets of Triquet
type: MusicRecording
duration: PT6M2S
duration ms: 362026
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by artist: Pyotr Ilyich Tchaikovsky
by artist: Sofia Festival Orchestra
by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Rossita Troeva-Mircheva
by artist: Nicolai Gedda
by artist: Michel Lecocq
by artist: Yuri Mazurok
by artist: Anna Tomowa-Sintow
by artist: Nicola Ghiuselev
by artist: Stoil Georgiev
by artist: Emil Tchakarov
by artist: Sofia National Opera Chorus
in album: Tchaikovsky: Eugene Onegin
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  date published: 1990
isrc code: USSM10404569
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additional property: OTSVerifyInstructions
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  date published: 2026-07-08T08:56:20Z
audio: Eugene Onegin, Op. 24, Act II: Lensky: "Have I really deserved this..."and Couplets of Triquet
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Eugene Onegin, Op. 24, Act II: Final; Lensky: "In your house!"
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duration: PT4M46S
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by artist: Pyotr Ilyich Tchaikovsky
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by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Rossita Troeva-Mircheva
by artist: Nicolai Gedda
by artist: Michel Lecocq
by artist: Yuri Mazurok
by artist: Anna Tomowa-Sintow
by artist: Nicola Ghiuselev
by artist: Stoil Georgiev
by artist: Emil Tchakarov
by artist: Sofia National Opera Chorus
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  date published: 2026-07-08T03:39:04Z
audio: Eugene Onegin, Op. 24, Act II: Final; Lensky: "In your house!"
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Eugene Onegin (Act 1, Scene 2, continued): Letter scene
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by artist: Michel Lecocq
by artist: Yuri Mazurok
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  date published: 2026-07-30T12:06:10Z
audio: Eugene Onegin (Act 1, Scene 2, continued): Letter scene
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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

Eugene Onegin (Act 1, Scene 2, continued): Duet; Tatyana: "Oh, the night has passed..."
type: MusicRecording
duration: PT6M14S
duration ms: 374666
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Sofia Festival Orchestra
by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Rossita Troeva-Mircheva
by artist: Nicolai Gedda
by artist: Michel Lecocq
by artist: Yuri Mazurok
by artist: Anna Tomowa-Sintow
by artist: Nicola Ghiuselev
by artist: Stoil Georgiev
by artist: Emil Tchakarov
by artist: Sofia National Opera Chorus
in album: Tchaikovsky: Eugene Onegin
  type: MusicAlbum
  date published: 1990
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbc30439a19c186a063ee62ad085c934deef6bdc5e4898ecb6645341acf282b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USSM10404562.
  date published: 2026-07-31T08:26:41Z
audio: Eugene Onegin (Act 1, Scene 2, continued): Duet; Tatyana: "Oh, the night has passed..."
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 114.293
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.262
  additional property: Energy
    type: PropertyValue
    value: 0.049
  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.951
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.099
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.046
  additional property: Loudness (dB)
    type: PropertyValue
    value: -29.958
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: USSM10404562
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960368
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T08:26:41+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404562
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960368
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960368
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T08:26:41+00:00
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 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

Eugene Onegin, Op. 24, Act II: Entr'acte and Waltz with chorus
type: MusicRecording
duration: PT8M26S
duration ms: 506066
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Sofia Festival Orchestra
by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Rossita Troeva-Mircheva
by artist: Nicolai Gedda
by artist: Michel Lecocq
by artist: Yuri Mazurok
by artist: Anna Tomowa-Sintow
by artist: Nicola Ghiuselev
by artist: Stoil Georgiev
by artist: Emil Tchakarov
by artist: Sofia National Opera Chorus
in album: Tchaikovsky: Eugene Onegin
  type: MusicAlbum
  date published: 1990
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bd8f47503ab1a5b8c403d6ba0d905cebf110a9962a19cb57c452047b781397. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USSM10404568.
  date published: 2026-07-30T15:42:38Z
audio: Eugene Onegin, Op. 24, Act II: Entr'acte and Waltz with chorus
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 95.606
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.243
  additional property: Energy
    type: PropertyValue
    value: 0.103
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.916
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.026
  additional property: Liveness
    type: PropertyValue
    value: 0.098
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.199
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.544
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: USSM10404568
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960273
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-30T15:42:38+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404568
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960273
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960273
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T15:42:38+00:00
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 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

Eugene Onegin, Op. 24, Act II: Mazurka
type: MusicRecording
duration: PT4M49S
duration ms: 289973
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Sofia Festival Orchestra
by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Rossita Troeva-Mircheva
by artist: Nicolai Gedda
by artist: Michel Lecocq
by artist: Yuri Mazurok
by artist: Anna Tomowa-Sintow
by artist: Nicola Ghiuselev
by artist: Stoil Georgiev
by artist: Emil Tchakarov
by artist: Sofia National Opera Chorus
in album: Tchaikovsky: Eugene Onegin
  type: MusicAlbum
  date published: 1990
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c2b94c25c8b7a591879fe09b1f9461f4435e7312086aeaeb17d272f7814609. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USSM10404570.
  date published: 2026-07-31T22:27:44Z
audio: Eugene Onegin, Op. 24, Act II: Mazurka
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 94.758
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.341
  additional property: Energy
    type: PropertyValue
    value: 0.147
  additional property: Speechiness
    type: PropertyValue
    value: 0.048
  additional property: Acousticness
    type: PropertyValue
    value: 0.914
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.246
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.453
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.546
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor
isrc code: USSM10404570
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960473
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T22:27:44+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404570
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960473
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960473
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T22:27:44+00:00
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 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

Eugene Onegin, Op. 24, Act II: Introduction, Zaretsky: "Well, it seems..."
type: MusicRecording
duration: PT8M33S
duration ms: 513133
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Dimiter stanchev
by artist: Emil Tchakarov
by artist: Sofia Festival Orchestra
by artist: Stoil Georgiev
by artist: Sofia National Opera Chorus
by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Nicolai Gedda
by artist: Michel Lecocq
by artist: Yuri Mazurok
by artist: Anna Tomowa-Sintow
by artist: Nicola Ghiuselev
by artist: Rossita Troeva-Mircheva
in album: Tchaikovsky: Eugene Onegin
  type: MusicAlbum
  date published: 1990
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d8de583456ff160bc740817de0ba0f7eae7e42c0106217a70a6dcb8bff5327. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USSM10404573.
  date published: 2026-07-31T12:24:41Z
audio: Eugene Onegin, Op. 24, Act II: Introduction, Zaretsky: "Well, it seems..."
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 106.414
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.171
  additional property: Energy
    type: PropertyValue
    value: 0.031
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.942
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.097
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.071
  additional property: Loudness (dB)
    type: PropertyValue
    value: -30.435
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor
isrc code: USSM10404573
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960397
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T12:24:41+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404573
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960397
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960397
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T12:24:41+00:00
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 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