Stefka Popangelova
type: MusicGroup
genre: classical
genre: opera
popularity: 27
followers: 41
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4d8e341b3156e004e6a0b4d4863592358bd57fad70ff140f5baa70d58b6c6e83
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/766ac178-9d8d-40b8-8799-fc921d3b6b60.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/766ac178-9d8d-40b8-8799-fc921d3b6b60.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/766ac178-9d8d-40b8-8799-fc921d3b6b60
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4d8e341b3156e004e6a0b4d4863592358bd57fad70ff140f5baa70d58b6c6e83","name":"Stefka Popangelova","registered_at":"2026-06-12T01:10:21Z","symbol":"NIM0152439","token_address":"0x295a7c32d10e78c118b7018bd72dbd5f2d1d935a","type":"artist","uuid":"766ac178-9d8d-40b8-8799-fc921d3b6b60"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8e341b3156e004e6a0b4d4863592358bd57fad70ff140f5baa70d58b6c6e83. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/766ac178-9d8d-40b8-8799-fc921d3b6b60.json and https://artists.proofprofile.net/proofs/artist/766ac178-9d8d-40b8-8799-fc921d3b6b60.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x4d8e341b3156e004e6a0b4d4863592358bd57fad70ff140f5baa70d58b6c6e83","name":"Stefka Popangelova","registered_at":"2026-06-12T01:10:21Z","symbol":"NIM0152439","token_address":"0x295a7c32d10e78c118b7018bd72dbd5f2d1d935a","type":"artist","uuid":"766ac178-9d8d-40b8-8799-fc921d3b6b60"}
track: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Introduction
  type: MusicRecording
  duration: PT2M21S
  duration ms: 141533
  explicit: false
  by artist: Pyotr Ilyich Tchaikovsky
  by artist: Emil Tchakarov
  by artist: Sofia Festival Orchestra
  by artist: Michel Lecocq
  by artist: Yuri Mazurok
  by artist: Anna Tomowa-Sintow
  by artist: Nicola Ghiuselev
  by artist: Stoil Georgiev
  by artist: Sofia National Opera Chorus
  by artist: Margarita Lilova
  by artist: Stefka Popangelova
  by artist: Rossitza Troeva-Mircheva
  by artist: Nicolai Gedda
  in album: Tchaikovsky: Eugene Onegin
    type: MusicAlbum
    date published: 1990
  isrc code: USSM10404551
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-05T13:13:17+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x845494d7eb375264709386d82c750a548c9c19a1043f2f290958279624f03db8
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 953513
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/953513
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404551
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-06-13T12:47:07Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845494d7eb375264709386d82c750a548c9c19a1043f2f290958279624f03db8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM10404551 — a six-check JSON result.
    date published: 2026-06-13T12:47:07Z
  audio: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Introduction
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 138.953
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.163
    additional property: Energy
      type: PropertyValue
      value: 0.012
    additional property: Speechiness
      type: PropertyValue
      value: 0.042
    additional property: Acousticness
      type: PropertyValue
      value: 0.949
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.044
    additional property: Liveness
      type: PropertyValue
      value: 0.107
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.065
    additional property: Loudness (dB)
      type: PropertyValue
      value: -33.27
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Chorus and dance of peasants
  type: MusicRecording
  duration: PT4M53S
  duration ms: 293306
  explicit: false
  by artist: Pyotr Ilyich Tchaikovsky
  by artist: Emil Tchakarov
  by artist: Sofia National Opera Chorus
  by artist: Sofia Festival Orchestra
  by artist: Stoil Georgiev
  by artist: Margarita Lilova
  by artist: Stefka Popangelova
  by artist: Rositsa Troeva-Mirgheva
  by artist: Nicolai Gedda
  by artist: Michel Lecocq
  by artist: Yuri Mazurok
  by artist: Anna Tomowa-Sintow
  by artist: Nicola Ghiuselev
  in album: Tchaikovsky: Eugene Onegin
    type: MusicAlbum
    date published: 1990
  isrc code: USSM10404553
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T20:52:32+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x74e0146d48aac49288dc84a05989e6c69b8b282d0979d38b75c86d8cba7d3bf4
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404553
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e0146d48aac49288dc84a05989e6c69b8b282d0979d38b75c86d8cba7d3bf4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USSM10404553 — a six-check JSON result.
    date published: 2026-07-08T03:20:19Z
  audio: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Chorus and dance of peasants
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 110.802
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
    additional property: Energy
    additional property: Speechiness
    additional property: Acousticness
    additional property: Instrumentalness
    additional property: Liveness
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name
track: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Larina: "Well, my lively one..."
track: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Quartet; Lensky: "Mesdames! I ventuered..."
track: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Tatyana: "How I love to listen..."
track: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Lensky: "How happy, how happy I am..."
track: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Final Scene
track: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Introduction; Nurse: "Well, I've talked too much!"
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 (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: Entr'acte and Waltz with chorus
track: Eugene Onegin, Op. 24, Act II: Lensky: "Have I really deserved this..."and Couplets of Triquet
track: Eugene Onegin, Op. 24, Act II: Mazurka
track: Eugene Onegin, Op. 24, Act II: Final; Lensky: "In your house!"
track: Eugene Onegin, Op. 24, Act II: Introduction, Zaretsky: "Well, it seems..."

Danceability
type: PropertyValue
value: 0.249

Energy
type: PropertyValue
value: 0.206

Speechiness
type: PropertyValue
value: 0.036

Acousticness
type: PropertyValue
value: 0.905

Instrumentalness
type: PropertyValue
value: 0.008

Liveness
type: PropertyValue
value: 0.238

Valence (Positivity)
type: PropertyValue
value: 0.29

Loudness (dB)
type: PropertyValue
value: -25.658

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Minor

Eugene Onegin (Lyrical scenes in three acts) (Act 1): Larina: "Well, my lively one..."
type: MusicRecording
duration: PT3M31S
duration ms: 211026
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Emil Tchakarov
by artist: Sofia Festival Orchestra
by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Rositsa Troeva-Mirgheva
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: Sofia National Opera Chorus
in album: Tchaikovsky: Eugene Onegin
  type: MusicAlbum
  date published: 1990
isrc code: USSM10404555
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T03:10:48+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x37aa5e46780cdc6fd676cfc684984edcc1b0a4e279f359ee75a8a314ebdeb5cb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404555
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aa5e46780cdc6fd676cfc684984edcc1b0a4e279f359ee75a8a314ebdeb5cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USSM10404555 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Larina: "Well, my lively one..."
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 99.546
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.346
  additional property: Energy
    type: PropertyValue
    value: 0.024
  additional property: Speechiness
    type: PropertyValue
    value: 0.079
  additional property: Acousticness
    type: PropertyValue
    value: 0.971
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.09
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.089
  additional property: Loudness (dB)
    type: PropertyValue
    value: -30.922
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Eugene Onegin (Lyrical scenes in three acts) (Act 1): Quartet; Lensky: "Mesdames! I ventuered..."
type: MusicRecording
duration: PT3M18S
duration ms: 198133
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Emil Tchakarov
by artist: Sofia Festival Orchestra
by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Rositsa Troeva-Mirgheva
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: Sofia National Opera Chorus
in album: Tchaikovsky: Eugene Onegin
  type: MusicAlbum
  date published: 1990
isrc code: USSM10404556
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T04:48:21+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1d7d60a2924d666b3eaff658e2711f93b438e92c823f6387bee323346d559873
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960348
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960348
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404556
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T05:17:02Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7d60a2924d666b3eaff658e2711f93b438e92c823f6387bee323346d559873. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USSM10404556 — a six-check JSON result.
  date published: 2026-07-31T05:17:02Z
audio: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Quartet; Lensky: "Mesdames! I ventuered..."
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 134.993
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.416
  additional property: Energy
    type: PropertyValue
    value: 0.03
  additional property: Speechiness
    type: PropertyValue
    value: 0.076
  additional property: Acousticness
    type: PropertyValue
    value: 0.966
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.143
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.151
  additional property: Loudness (dB)
    type: PropertyValue
    value: -30.452
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Eugene Onegin (Lyrical scenes in three acts) (Act 1): Tatyana: "How I love to listen..."
type: MusicRecording
duration: PT3M29S
duration ms: 209506
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Emil Tchakarov
by artist: Sofia Festival Orchestra
by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Rositsa Troeva-Mirgheva
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: Sofia National Opera Chorus
in album: Tchaikovsky: Eugene Onegin
  type: MusicAlbum
  date published: 1990
isrc code: USSM10404554
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T01:19:48+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2193fb0d98e6e15b6609610a72e49c3ecbbdc9a7cf2b7db7f47fd7927d4b7f12
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960334
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960334
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404554
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T02:19:15Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2193fb0d98e6e15b6609610a72e49c3ecbbdc9a7cf2b7db7f47fd7927d4b7f12. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USSM10404554 — a six-check JSON result.
  date published: 2026-07-31T02:19:15Z
audio: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Tatyana: "How I love to listen..."
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 96.872
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.211
  additional property: Energy
    type: PropertyValue
    value: 0.034
  additional property: Speechiness
    type: PropertyValue
    value: 0.068
  additional property: Acousticness
    type: PropertyValue
    value: 0.97
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.135
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.098
  additional property: Loudness (dB)
    type: PropertyValue
    value: -30.836
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Eugene Onegin (Lyrical scenes in three acts) (Act 1): Lensky: "How happy, how happy I am..."
type: MusicRecording
duration: PT5M2S
duration ms: 302800
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Emil Tchakarov
by artist: Sofia Festival Orchestra
by artist: Rositsa Troeva-Mirgheva
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: Sofia National Opera Chorus
by artist: Margarita Lilova
by artist: Stefka Popangelova
in album: Tchaikovsky: Eugene Onegin
  type: MusicAlbum
  date published: 1990
isrc code: USSM10404557
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T00:36:48+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf0fad741f63deb2f1134f61563a28ac9c9b5414104f82d7370f7d9f7332241a8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960334
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960334
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404557
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T02:19:15Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fad741f63deb2f1134f61563a28ac9c9b5414104f82d7370f7d9f7332241a8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USSM10404557 — a six-check JSON result.
  date published: 2026-07-31T02:19:15Z
audio: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Lensky: "How happy, how happy I am..."
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 166.627
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 6
  additional property: Danceability
    type: PropertyValue
    value: 0.247
  additional property: Energy
    type: PropertyValue
    value: 0.07
  additional property: Speechiness
    type: PropertyValue
    value: 0.054
  additional property: Acousticness
    type: PropertyValue
    value: 0.948
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.061
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.24
  additional property: Loudness (dB)
    type: PropertyValue
    value: -29.715
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

Eugene Onegin (Lyrical scenes in three acts) (Act 1): Final Scene
type: MusicRecording
duration: PT2M27S
duration ms: 147026
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Emil Tchakarov
by artist: Sofia Festival Orchestra
by artist: Michel Lecocq
by artist: Yuri Mazurok
by artist: Anna Tomowa-Sintow
by artist: Nicola Ghiuselev
by artist: Stoil Georgiev
by artist: Sofia National Opera Chorus
by artist: Margarita Lilova
by artist: Stefka Popangelova
by artist: Rositsa Troeva-Mirgheva
by artist: Nicolai Gedda
in album: Tchaikovsky: Eugene Onegin
  type: MusicAlbum
  date published: 1990
isrc code: USSM10404558
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T19:28:33+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe64bea8b8cd863ef02660368760ea4dcaafeb158c9df9af6573985aaf7099e3c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960455
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960455
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404558
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T19:53:13Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64bea8b8cd863ef02660368760ea4dcaafeb158c9df9af6573985aaf7099e3c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USSM10404558 — a six-check JSON result.
  date published: 2026-07-31T19:53:13Z
audio: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Final Scene
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 110.831
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.261
  additional property: Energy
    type: PropertyValue
    value: 0.023
  additional property: Speechiness
    type: PropertyValue
    value: 0.05
  additional property: Acousticness
    type: PropertyValue
    value: 0.94
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.409
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.121
  additional property: Loudness (dB)
    type: PropertyValue
    value: -31.254
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Eugene Onegin (Lyrical scenes in three acts) (Act 1): Introduction; Nurse: "Well, I've talked too much!"
type: MusicRecording
duration: PT7M47S
duration ms: 467560
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
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: Rositsa Troeva-Mirgheva
by artist: Nicolai Gedda
by artist: Michel Lecocq
by artist: Yuri Mazurok
by artist: Anna Tomowa-Sintow
by artist: Nicola Ghiuselev
in album: Tchaikovsky: Eugene Onegin
  type: MusicAlbum
  date published: 1990
isrc code: USSM10404560
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T18:13:07+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1a17ef2ac8e08a1b51b34ed6c2f82c6d7c1efd98eaa559c0ed98fafe5c9ee137
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960291
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960291
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404560
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T18:23:33Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a17ef2ac8e08a1b51b34ed6c2f82c6d7c1efd98eaa559c0ed98fafe5c9ee137. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USSM10404560 — a six-check JSON result.
  date published: 2026-07-30T18:23:33Z
audio: Eugene Onegin (Lyrical scenes in three acts) (Act 1): Introduction; Nurse: "Well, I've talked too much!"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 106.626
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.246
  additional property: Energy
    type: PropertyValue
    value: 0.03
  additional property: Speechiness
    type: PropertyValue
    value: 0.052
  additional property: Acousticness
    type: PropertyValue
    value: 0.984
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.002
  additional property: Liveness
    type: PropertyValue
    value: 0.125
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.039
  additional property: Loudness (dB)
    type: PropertyValue
    value: -30.646
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Eugene Onegin (Act 1, Scene 2, continued): Letter scene
type: MusicRecording
duration: PT13M38S
duration ms: 818373
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
isrc code: USSM10404561
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T11:43:44+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6f092aa940a13036fe64c8f3bbd22e7fc05508c54cd670664bd09b89ab2b4d4b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960254
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960254
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404561
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T12:06:10Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f092aa940a13036fe64c8f3bbd22e7fc05508c54cd670664bd09b89ab2b4d4b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USSM10404561 — a six-check JSON result.
  date published: 2026-07-30T12:06:10Z
audio: Eugene Onegin (Act 1, Scene 2, continued): Letter scene
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 103.296
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.21
  additional property: Energy
    type: PropertyValue
    value: 0.081
  additional property: Speechiness
    type: PropertyValue
    value: 0.062
  additional property: Acousticness
    type: PropertyValue
    value: 0.971
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.002
  additional property: Liveness
    type: PropertyValue
    value: 0.111
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.038
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.205
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major

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
isrc code: USSM10404562
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T07:32:42+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2bbc30439a19c186a063ee62ad085c934deef6bdc5e4898ecb6645341acf282b
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: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404562
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T08:26:41Z
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
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404562 — a six-check JSON result.
  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

Eugene Onegin (Act 1, Scene 2, continued): Chorus of serf maidens: Maidens, beauties
type: MusicRecording
duration: PT2M57S
duration ms: 177773
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
isrc code: USSM10404564
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-08T00:02:15+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xeaa03adac5e3f36e4f00a6c052d4a6b353fb50e65f5d86c3733f5a011214fa98
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957120
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957120
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404564
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa03adac5e3f36e4f00a6c052d4a6b353fb50e65f5d86c3733f5a011214fa98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404564 — a six-check JSON result.
  date published: 2026-07-08T03:22:41Z
audio: Eugene Onegin (Act 1, Scene 2, continued): Chorus of serf maidens: Maidens, beauties
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 120.98
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.183
  additional property: Energy
    type: PropertyValue
    value: 0.029
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.978
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.023
  additional property: Liveness
    type: PropertyValue
    value: 0.052
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.071
  additional property: Loudness (dB)
    type: PropertyValue
    value: -35.803
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Eugene Onegin (Act 1, Scene 2, continued): Tatyana: He's here...and aria of Onegin: If I should ever wish
type: MusicRecording
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duration ms: 510933
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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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additional property: OTSVerificationAPI
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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 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: 2026-07-08T03:22:41Z
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: 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
isrc code: USSM10404568
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T15:42:38Z
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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T15:42:38Z
audio: Eugene Onegin, Op. 24, Act II: Entr'acte and Waltz with chorus
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Eugene Onegin, Op. 24, Act II: Lensky: "Have I really deserved this..."and Couplets of Triquet
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duration: PT6M2S
duration ms: 362026
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
isrc code: USSM10404569
additional property: CopyrightID
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
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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 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
  type: DigitalDocument
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  date published: 2026-07-08T03:22:41Z
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: Mazurka
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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
isrc code: USSM10404570
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T22:27:44Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  date published: 2026-07-31T22:27:44Z
audio: Eugene Onegin, Op. 24, Act II: Mazurka
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Eugene Onegin, Op. 24, Act II: Final; Lensky: "In your house!"
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duration: PT4M46S
duration ms: 286800
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
isrc code: USSM10404571
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  date published: 2026-07-08T03:22:41Z
audio: Eugene Onegin, Op. 24, Act II: Final; Lensky: "In your house!"
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Eugene Onegin, Op. 24, Act II: Introduction, Zaretsky: "Well, it seems..."
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duration: PT8M33S
duration ms: 513133
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
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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
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  date published: 1990
isrc code: USSM10404573
additional property: CopyrightID
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T12:24:41Z
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
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10404573 — a six-check JSON result.
  date published: 2026-07-31T12:24:41Z
audio: Eugene Onegin, Op. 24, Act II: Introduction, Zaretsky: "Well, it seems..."
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