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    subject of: OpenTimestamps Proof of Existence
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  track: Valse in A-Flat Major, Op. 39 No. 15
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    subject of: OpenTimestamps Proof of Existence
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album: 'Ares' - Classical & Contemporary Essentials
album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
album: "Fairies" - Piano Legacies
album: "094 Classical & Contemporary Essentials" - Aura
album: "060 Classical & Contemporary Masterworks": Iydra
album: "111 Classical Piano Essentials" : Trepak
album: "074 Classical Essentials": Echos Du Temps
album: "090 Classical Melodies" - Das Lebewohl
album: Slavic Whispers: Piano Music for 4 Hands
album: "069 Classical Piano Evocations": Ballabiles
album: "072 Hidden Treasures of Piano": Bal Fantome
track: Deutscher Tanz in F Major Hob.IX 10
track: Etude No. 6
track: Menuetto in F Major K6 Anh.B
track: Nocturne from the Composition Notebook
track: Menuet in C Major KV 1f
track: Nocturne in B Major, Op. 62 No.1

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    date published: 2026-07-05T19:27:56Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:55:08Z
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track: 3 Preludes: Prelude No. 1
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:55:08Z
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  audio: Sonata 60 Hob XVI 50: I. Allegro
track: The Seasons. Op. 37A: No. 11, Troika (November) - Duo-Art S-31438
track: Ramillete De Flores, Op. 147: II. Cinque Terre
track: Barcarolle, Op. 26, No. 1
track: Gymnopédie No. 2
track: Techno-Parade
track: Anna Magdalena Bach's Book: Musette in D Major BWV Anh. II 126
track: Ave Verum Corpus KV 618 (Arr. Solo Piano by R. Bender)
track: Clarinet Concerto in A Major KV 622 (Piano Transcription by Hans-Günter Heumann): II. Adagio
track: Easy Sonata in C Major - Andante
track: Easy Sonata in C Major - Rondo
track: Lacrimosa from Requiem KV 626 (Piano Transcription by Hans-Günter Heumann)
track: String Quartet No. 1: III. Luminoso
track: Etude No. 5
track: Rivera
track: Six Studies in English Folk Song (Arr. Flute & Piano by Katrina Penman): II. Andante Sostenuto
track: Diálogos Con las Estrellas: II.
track: Ocre Inhalado: V. Imitando al Salterio
track: Xàfec de Llum I Tenebres: Vi. No Temas
track: Pictures at an Exhibition: Promenade IV
track: Pictures at an Exhibition: Promenade II
track: 2 Piano Pieces, Op. 38: Prelude-Impromptu, Op. 38, No. 1
track: Rigaudon, Op. 12 - Duo-Art 6344
track: Pictures at an Exhibition: Promenade V
track: Lyrische Stucke. Op. 43: No. 4, Little Bird - Duo-Art 66048
track: Hedge Rose (Heidenroslein) D. 257 [Arr. By Godowsky] - Duo-Art 73039
track: 10 Pieces for Piano No. 1, Op. 12: March
track: Lyrische Stucke, Op. 43: No. 4, Voeglein Birdling (Little Bird) - Welte-Mignon 1277
track: Carmen (Arr. Solo Piano by Armbruster): Act 3 Selections (Part I) - Duo-Art 72659
track: Water Music Suite: Hornpipe (Arr. Solo Piano by Grainger) - Duo-Art 6754
track: Album Leaf, Op. 28: No. 3, Dance Caprice - Duo-Art_66048_2
track: Lyrische Stucke, Op. 43: No. 6 to Spring (An Den Fruling) - Welte-Mignon 1307
track: Romance Sans Paroles, Op. 17 No. 3 - Duo-Art 5659
track: Carmen (Arr. Solo Piano by Armbruster): Act 3 Selections (Part II) - Duo-Art 72659
track: Stemninger, Op. 73: No. 2, Scherzo Impromptu - Duo-Art 6150
track: Album Leaf. Op. 28: No. 3, Dance Caprice - Due-Art 04 Br
track: Ständchen, D.889: Hark! Hark! the Lark! (Transcription by Liszt) - Duo-Art 6052
track: Scherzo No.1 in B-Flat Major (Posthumous) D.593 - Welte-Mignon 915
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track: The Seasons, Op. 37a: No. 12, Noel (December) - Duo-Art 70829
track: Liebesfreud. (Love's Joy) No. 1 from Alt Wiener Tanzweisen - Duo-Art 5864
track: Litany for the Feast of All Souls, D. 343 (Arr. Solo Piano by Cortot) - Duo-Art 6126
track: Valse Sentimentale. Op. 51, No. 6 - Welte-Mignon 1679
track: La Damnation De Faust: Ballet Des Sylphes (Arr. Solo Piano by Liszt) - Welte-Mignon 965
track: The Seasons, Op. 37a: No. 6, Barcarolle (June) - Duo-Art 7128

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Ramillete De Flores, Op. 147: II. Cinque Terre
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Barcarolle, Op. 26, No. 1
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Gymnopédie No. 2
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Techno-Parade
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Anna Magdalena Bach's Book: Musette in D Major BWV Anh. II 126
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Ave Verum Corpus KV 618 (Arr. Solo Piano by R. Bender)
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Clarinet Concerto in A Major KV 622 (Piano Transcription by Hans-Günter Heumann): II. Adagio
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Easy Sonata in C Major - Andante
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Easy Sonata in C Major - Rondo
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Lacrimosa from Requiem KV 626 (Piano Transcription by Hans-Günter Heumann)
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String Quartet No. 1: III. Luminoso
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Etude No. 5
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427e869fbb3b3164990f8bddb605aabba6ee3628c99ef8bc988cebeb7031a131. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEPI82503004.
  date published: 2026-07-30T14:36:16Z
audio: Etude No. 5
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.322
  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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    value: 0.994
  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Rivera
type: MusicRecording
duration: PT3M48S
duration ms: 228142
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: DEPI82509615
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960203
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82509615
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T03:35:13Z
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 0x2132bc39d7a5ae30592261047aa5442dc52d3a4d250d1c31b2f751a6f24b55e4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82509615.
  date published: 2026-07-30T03:35:13Z
audio: Rivera
  type: AudioObject
  additional property: Tempo (BPM)
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    value: 111.227
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.33
  additional property: Energy
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    value: 0.163
  additional property: Speechiness
    type: PropertyValue
    value: 0.035
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Six Studies in English Folk Song (Arr. Flute & Piano by Katrina Penman): II. Andante Sostenuto
type: MusicRecording
duration: PT1M23S
duration ms: 83033
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: DEPI82450011
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x57600f5e72fc2cdb4461c75513fd83411e5b0b95a698565d2acf0e042824412f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960258
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960258
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82450011
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T12:45:34Z
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 0x57600f5e72fc2cdb4461c75513fd83411e5b0b95a698565d2acf0e042824412f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEPI82450011.
  date published: 2026-07-30T12:45:34Z
audio: Six Studies in English Folk Song (Arr. Flute & Piano by Katrina Penman): II. Andante Sostenuto
  type: AudioObject
  additional property: Tempo (BPM)
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    value: 95.822
  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.307
  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
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Diálogos Con las Estrellas: II.
type: MusicRecording
duration: PT4M15S
duration ms: 255994
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: DEPI82449849
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T01:15:11+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4f5d8593c069b07a127084058359513d561e634033971ec4e3f4d2145300a49e
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/DEPI82449849
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 0x4f5d8593c069b07a127084058359513d561e634033971ec4e3f4d2145300a49e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82449849.
  date published: 2026-07-08T03:20:19Z
audio: Diálogos Con las Estrellas: II.
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.329
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.054
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
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Ocre Inhalado: V. Imitando al Salterio
type: MusicRecording
duration: PT3M10S
duration ms: 190604
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: DEPI82412417
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-29T21:50:58+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x64897437291fe26001d3794587f149c04ccf13f294c0bc98c3c52cd69ecef897
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960153
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82412417
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-29T21:57:12Z
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 0x64897437291fe26001d3794587f149c04ccf13f294c0bc98c3c52cd69ecef897. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82412417.
  date published: 2026-07-29T21:57:12Z
audio: Ocre Inhalado: V. Imitando al Salterio
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Xàfec de Llum I Tenebres: Vi. No Temas
type: MusicRecording
duration: PT2M49S
duration ms: 169118
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: DEPI82450894
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T02:21:30+00:00
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xeffa77eb1c480982afd53a0a238f6fb117b300375559b6eebe0090d30845c66a
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82450894
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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffa77eb1c480982afd53a0a238f6fb117b300375559b6eebe0090d30845c66a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82450894.
  date published: 2026-07-08T03:20:19Z
audio: Xàfec de Llum I Tenebres: Vi. No Temas
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Mode Name
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Pictures at an Exhibition: Promenade IV
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duration: PT0M50S
duration ms: 50106
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: CH6542284239
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f305aab7f19850091d94efaf8bcf2ff311cdfc193de18a176cc559ad374ea9f. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/CH6542284239.
  date published: 2026-07-30T12:51:24Z
audio: Pictures at an Exhibition: Promenade IV
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Pictures at an Exhibition: Promenade II
type: MusicRecording
duration: PT0M51S
duration ms: 51098
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: CH6542284234
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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2 Piano Pieces, Op. 38: Prelude-Impromptu, Op. 38, No. 1
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subject of: OpenTimestamps Proof of Existence
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Rigaudon, Op. 12 - Duo-Art 6344
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T12:45:34Z
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Pictures at an Exhibition: Promenade V
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T14:36:16Z
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Lyrische Stucke. Op. 43: No. 4, Little Bird - Duo-Art 66048
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Hedge Rose (Heidenroslein) D. 257 [Arr. By Godowsky] - Duo-Art 73039
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10 Pieces for Piano No. 1, Op. 12: March
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Lyrische Stucke, Op. 43: No. 4, Voeglein Birdling (Little Bird) - Welte-Mignon 1277
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Lyrische Stucke, Op. 43: No. 4, Voeglein Birdling (Little Bird) - Welte-Mignon 1277
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Carmen (Arr. Solo Piano by Armbruster): Act 3 Selections (Part I) - Duo-Art 72659
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by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
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genre: classical piano
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. 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: 2026-07-08T03:20:19Z
audio: Carmen (Arr. Solo Piano by Armbruster): Act 3 Selections (Part I) - Duo-Art 72659
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Water Music Suite: Hornpipe (Arr. Solo Piano by Grainger) - Duo-Art 6754
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duration: PT1M48S
duration ms: 108339
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
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genre: classical piano
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. 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: 2026-07-31T06:58:00Z
audio: Water Music Suite: Hornpipe (Arr. Solo Piano by Grainger) - Duo-Art 6754
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Album Leaf, Op. 28: No. 3, Dance Caprice - Duo-Art_66048_2
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by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
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genre: classical piano
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. 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: 2026-07-30T20:45:02Z
audio: Album Leaf, Op. 28: No. 3, Dance Caprice - Duo-Art_66048_2
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Lyrische Stucke, Op. 43: No. 6 to Spring (An Den Fruling) - Welte-Mignon 1307
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duration: PT2M14S
duration ms: 134118
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by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
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genre: classical piano
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. 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: 2026-07-08T03:20:19Z
audio: Lyrische Stucke, Op. 43: No. 6 to Spring (An Den Fruling) - Welte-Mignon 1307
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Romance Sans Paroles, Op. 17 No. 3 - Duo-Art 5659
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in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
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genre: classical piano
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T05:17:02Z
audio: Romance Sans Paroles, Op. 17 No. 3 - Duo-Art 5659
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Carmen (Arr. Solo Piano by Armbruster): Act 3 Selections (Part II) - Duo-Art 72659
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duration: PT2M28S
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by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
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genre: classical piano
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T15:42:38Z
audio: Carmen (Arr. Solo Piano by Armbruster): Act 3 Selections (Part II) - Duo-Art 72659
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Stemninger, Op. 73: No. 2, Scherzo Impromptu - Duo-Art 6150
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in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
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genre: classical piano
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82447455
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T22:27:30Z
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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9fb0691ff88c35b8d403427de83dc9ce9c662d756f4798a89e2f35bfaed129. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEPI82447455.
  date published: 2026-07-30T22:27:30Z
audio: Stemninger, Op. 73: No. 2, Scherzo Impromptu - Duo-Art 6150
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Album Leaf. Op. 28: No. 3, Dance Caprice - Due-Art 04 Br
type: MusicRecording
duration: PT2M47S
duration ms: 167473
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: DEPI82307363
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82307363
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T22:27:30Z
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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d9a16a140fc3099c7a11e1fb2bcaf1933d24f974d847fa7acf2a70dc14c729. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEPI82307363.
  date published: 2026-07-30T22:27:30Z
audio: Album Leaf. Op. 28: No. 3, Dance Caprice - Due-Art 04 Br
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Ständchen, D.889: Hark! Hark! the Lark! (Transcription by Liszt) - Duo-Art 6052
type: MusicRecording
duration: PT2M57S
duration ms: 177013
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: DEPI82441456
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960321
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82441456
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T22:27:30Z
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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ee9b9fc46c2c5d04fb49321311e163038a8a62b240d8cdcb1a3e4a3ca8997d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEPI82441456.
  date published: 2026-07-30T22:27:30Z
audio: Ständchen, D.889: Hark! Hark! the Lark! (Transcription by Liszt) - Duo-Art 6052
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Scherzo No.1 in B-Flat Major (Posthumous) D.593 - Welte-Mignon 915
type: MusicRecording
duration: PT3M3S
duration ms: 183482
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: DEPI82307175
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x39e603ced784eb45be538e9367b1a5266e0ff2838d0069ce1e2292c3b4dd444c
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82307175
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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e603ced784eb45be538e9367b1a5266e0ff2838d0069ce1e2292c3b4dd444c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82307175.
  date published: 2026-07-08T03:20:19Z
audio: Scherzo No.1 in B-Flat Major (Posthumous) D.593 - Welte-Mignon 915
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.435
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.47
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
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Scherzo No. 1 in B-Flat Major (Posthumous) D.593 - Welte-Mignon 915
type: MusicRecording
duration: PT3M3S
duration ms: 183482
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: DEPI82305946
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc88db45d0b3329e668b208c8e0ce12407b4e09c791b1fa7bf83b6c839928ad. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82305946.
  date published: 2026-07-08T03:20:19Z
audio: Scherzo No. 1 in B-Flat Major (Posthumous) D.593 - Welte-Mignon 915
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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The Seasons, Op. 37a: No. 12, Noel (December) - Duo-Art 70829
type: MusicRecording
duration: PT3M7S
duration ms: 187366
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: DEPI82447451
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0d9094d21bb15b5d2811b7e71d23d1f0cdf7ea97515d326a9113711114f2c2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEPI82447451.
  date published: 2026-07-31T04:14:58Z
audio: The Seasons, Op. 37a: No. 12, Noel (December) - Duo-Art 70829
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
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Liebesfreud. (Love's Joy) No. 1 from Alt Wiener Tanzweisen - Duo-Art 5864
type: MusicRecording
duration: PT3M26S
duration ms: 206227
explicit: false
by artist: Joanna Sochacka
in album: 'Atalia' - Contemporary & Classical Masterworks, Vol. 2
  type: MusicAlbum
  date published: 2025-04-20
genre: classical piano
isrc code: DEPI82400356
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82400356
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 0x1e4cc780f0018b89d36b21b41405db0dc39c841d44051e073a8f3d5d08ed945a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82400356.
  date published: 2026-07-08T03:20:19Z
audio: Liebesfreud. (Love's Joy) No. 1 from Alt Wiener Tanzweisen - Duo-Art 5864
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
    value: 0.993
  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
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Litany for the Feast of All Souls, D. 343 (Arr. Solo Piano by Cortot) - Duo-Art 6126
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"Fairies" - Piano Legacies
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Prelude, Op. 28, No. 23 in F Major
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Preludes, Op. 28: No. 3 in G Major - Welte-Mignon 3184
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Prelude, Op. 28, No. 16 in B-Flat Minor - Duo-Art 035 Br
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Well Tempered Clavier, Book I: Prelude No. 5 in D Major, BWV 850 - Welte-Mignon 1836
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Etudes, Op. 25: No. 9 (Butterfly) in G-Flat Major - Welte-Mignon 1253
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Well-Tempered Clavier, Book I: Prelude No. 5 in D Major BWV 850 - Duo-Art 5650
type: MusicRecording
duration: PT1M11S
duration ms: 71099
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
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genre: classical piano
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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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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-15T14:38:07Z
audio: Well-Tempered Clavier, Book I: Prelude No. 5 in D Major BWV 850 - Duo-Art 5650
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Well-Tempered Clavier, Book II: Fugue No. 12 in F Minor, BWV 881 - Welte-Mignon 544
type: MusicRecording
duration: PT1M15S
duration ms: 75484
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
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  date published: 2025-07-16
genre: classical piano
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additional property: OTSBitcoinBlockVerifyURL
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a6fc204a73e423ed3444052c4d7f9c8982ccb6cd8d6be87e2535b9ba245976. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82307703.
  date published: 2026-07-03T08:56:35Z
audio: Well-Tempered Clavier, Book II: Fugue No. 12 in F Minor, BWV 881 - Welte-Mignon 544
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Well-Tempered Clavier, Book 2: Fugue No. 12 in F Minor, BWV 881 - Upon Aeolian Roll
type: MusicRecording
duration: PT1M16S
duration ms: 76093
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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: 2026-07-03T08:56:35Z
audio: Well-Tempered Clavier, Book 2: Fugue No. 12 in F Minor, BWV 881 - Upon Aeolian Roll
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3 Nouvelles Études, B. 130: No. 3, Allegretto in D♭ Major
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duration: PT1M19S
duration ms: 79414
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
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  date published: 2025-07-16
genre: classical piano
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. 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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f5ac4e6190b1599dd9f32f4cfc48a915ba9f779f73d73e9da1212829cc94b6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DEPI82422618.
  date published: 2026-07-15T06:58:20Z
audio: 3 Nouvelles Études, B. 130: No. 3, Allegretto in D♭ Major
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Well-Tempered Clavier, Book I: Prelude in C Sharp Major, No. 3 BWV 848
type: MusicRecording
duration: PT1M20S
duration ms: 80241
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
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  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82433504
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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
  type: DigitalDocument
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  date published: 2026-07-15T06:57:12Z
audio: Well-Tempered Clavier, Book I: Prelude in C Sharp Major, No. 3 BWV 848
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Well Tempered Clavier, Book I: Prelude No. 12 in F Minor, BWV 857 - Welte-Mignon 2965
type: MusicRecording
duration: PT1M23S
duration ms: 83604
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
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  date published: 2025-07-16
genre: classical piano
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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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
  type: DigitalDocument
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  date published: 2026-07-03T10:47:44Z
audio: Well Tempered Clavier, Book I: Prelude No. 12 in F Minor, BWV 857 - Welte-Mignon 2965
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Etudes, Op. 25: No. 2 (The Bees), in F Minor - Duo-Art 6349
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duration: PT1M26S
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in album: "094 Classical & Contemporary Essentials" - Aura
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genre: classical piano
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-03T08:56:35Z
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3 Nouvelles Études, B. 130: No. 1, Andantino in F Minor - Duo-Art 7451
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  date published: 2026-07-03T08:56:35Z
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Etudes, Op. 10: No. 7 in C Major, 'Toccata' - Duo-Art 5561
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-15T07:27:09Z
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Etudes, Op. 10: No. 5 in G♭ Major, 'Black Keys' - Duo-Art 8022
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  date published: 2026-07-15T15:55:19Z
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Piano Sonata No. 14, Op. 27 No. 2 Quasi Una Fantasia: II. Allegretto - Duo-Art 6102
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-16T02:28:43Z
audio: Piano Sonata No. 14, Op. 27 No. 2 Quasi Una Fantasia: II. Allegretto - Duo-Art 6102
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Violin Sonata No. 2 (Arr. Solo Piano by Saint-Saëns): Bourree, in B Minor
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  date published: 2026-07-03T10:47:44Z
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Country Dance WoO. 14 No. 1, in C Major - Duo-Art 7205
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subject of: OpenTimestamps Proof of Existence
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Piano Sonata No. 13, Op. 27 No. 1: II. Molto Allegro E Vivace - Duo-Art 0287 Br
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047c902b4d3fb463698fb6fa4e996ddd635a3fdf53d76debdb5fa83dee00243d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82439069.
  date published: 2026-07-17T06:09:33Z
audio: Piano Sonata No. 13, Op. 27 No. 1: II. Molto Allegro E Vivace - Duo-Art 0287 Br
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Piano Sonata No. 25, Op. 79: III. Vivace - Duo-Art 0278 Br
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duration: PT1M47S
duration ms: 107740
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82439071
additional property: CopyrightID
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additional property: CopyrightRegisteredAt
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8ef8a4d28a93391786f87ad042567ce1bce337c3ca2abd67f67486478a5183. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEPI82439071.
  date published: 2026-07-15T20:32:27Z
audio: Piano Sonata No. 25, Op. 79: III. Vivace - Duo-Art 0278 Br
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Toccata in G Major BWV 916, No. 3 - Duo-Art 72369
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duration: PT1M47S
duration ms: 107600
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82439077
additional property: CopyrightID
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additional property: CopyrightRegisteredAt
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82439077
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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1f68c6deb13a479df0677a8f4934b506bf1aa1b2beb2827eef9acb97fa61d4. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEPI82439077.
  date published: 2026-07-15T22:40:25Z
audio: Toccata in G Major BWV 916, No. 3 - Duo-Art 72369
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  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Danceability
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Water Music Suite: Hornpipe (Arr. Solo Piano by Grainger) - Duo-Art 6754
type: MusicRecording
duration: PT1M48S
duration ms: 108339
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82325042
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27d464b8a6023188709b6ffa9611ce7a9248f36a3944051673ffdc5bf974835. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82325042.
  date published: 2026-07-17T06:09:33Z
audio: Water Music Suite: Hornpipe (Arr. Solo Piano by Grainger) - Duo-Art 6754
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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Scottish Dances (Six Ecossaisen) WoO. 83 - Duo-Art_5638
type: MusicRecording
duration: PT1M54S
duration ms: 114021
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82404070
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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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
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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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2650070cc0f4729711dc32b9cc05e67821b9dc8e5bf54ba1cda1a1ab5027ec. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82404070.
  date published: 2026-07-17T06:09:33Z
audio: Scottish Dances (Six Ecossaisen) WoO. 83 - Duo-Art_5638
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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Suite for Harpsichord, No. 14: Gavotte Varie - Welte-Mignon 540
type: MusicRecording
duration: PT2M4S
duration ms: 124450
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82320111
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b7c9ac935837e5cd066c6fcd1310dac642ffebdd422058af20d6878ad2e205. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPI82320111.
  date published: 2026-07-03T19:59:51Z
audio: Suite for Harpsichord, No. 14: Gavotte Varie - Welte-Mignon 540
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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Six Minuets for Piano, WoO 10: No. 2, Minuet in G - Duo-Art 67439
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duration: PT2M6S
duration ms: 126541
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82439056
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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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
  type: DigitalDocument
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  date published: 2026-07-17T06:09:33Z
audio: Six Minuets for Piano, WoO 10: No. 2, Minuet in G - Duo-Art 67439
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  additional property: Valence (Positivity)
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Piano Sonata No. 11 in A Major, K.331: III. Rondo Alla Turca - Duo-Art 6228
type: MusicRecording
duration: PT2M10S
duration ms: 130869
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82439072
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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7815a64106cd518fd74d211ffebd818f9a46420597548e84429386577b074f0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82439072.
  date published: 2026-07-17T06:09:33Z
audio: Piano Sonata No. 11 in A Major, K.331: III. Rondo Alla Turca - Duo-Art 6228
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  additional property: Valence (Positivity)
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32 Variations in C Minor, WoO 80: Theme and Variations (Pt. 1) - Welte-Mignon 527
type: MusicRecording
duration: PT2M12S
duration ms: 132300
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82433502
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956560
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82433502
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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56224996cbb8d78cdb652c3e66433e45beb35b6c65733176097a05f0a3f417f9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82433502.
  date published: 2026-07-03T23:28:02Z
audio: 32 Variations in C Minor, WoO 80: Theme and Variations (Pt. 1) - Welte-Mignon 527
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Ruins of Athens. Op. 113.: Turkish March or March (Arr. Solo Piano by Novaes) - Welte-Mignon 2881
type: MusicRecording
duration: PT2M27S
duration ms: 147489
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82405206
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958428
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82405206
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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0694f111980a97c46aae96c2a8907fa887282f137fc5919293a870b2a90ac526. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEPI82405206.
  date published: 2026-07-17T15:15:14Z
audio: Ruins of Athens. Op. 113.: Turkish March or March (Arr. Solo Piano by Novaes) - Welte-Mignon 2881
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  additional property: Danceability
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  additional property: Energy
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  additional property: Valence (Positivity)
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Violin Sonata No. 2: Bourree in B Minor (Transcription by Saint-Saens) - Duo-Art 67719
type: MusicRecording
duration: PT2M28S
duration ms: 148226
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82402345
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d4fdcdbc54439162876d3002c2ff946cd579fda0aab00d5a75c36b3897ed35. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEPI82402345.
  date published: 2026-07-17T16:42:22Z
audio: Violin Sonata No. 2: Bourree in B Minor (Transcription by Saint-Saens) - Duo-Art 67719
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
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Humoresque, Op. 10, No. 2 in G Major (Based on a French Popular Song) - Duo-Art 7115
type: MusicRecording
duration: PT2M29S
duration ms: 149534
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82325035
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
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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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaa489ee2ba80000a10e5925657d9784c8c4e76656f37dcd2e33ae1a7fbe8cc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82325035.
  date published: 2026-07-17T06:09:33Z
audio: Humoresque, Op. 10, No. 2 in G Major (Based on a French Popular Song) - Duo-Art 7115
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
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Don Giovanni's Serenade (Arr. Solo Piano by Backhaus) - Duo-Art 68250
type: MusicRecording
duration: PT2M29S
duration ms: 149376
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82441461
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82441461
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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7120fb9934948a83aed556b45b262fefb90ea81778d9c61e48d57686808a7d97. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82441461.
  date published: 2026-07-17T07:07:02Z
audio: Don Giovanni's Serenade (Arr. Solo Piano by Backhaus) - Duo-Art 68250
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Mode Name
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Chanson Triste, Op. 40, No. 2 - Welte-Mignon_1362
type: MusicRecording
duration: PT2M31S
duration ms: 151406
explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
  type: MusicAlbum
  date published: 2025-07-16
genre: classical piano
isrc code: DEPI82404062
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170532db041a1591112ef65b701eae0321de25c748d2ed60edd1c14fb0e7a2b0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEPI82404062.
  date published: 2026-07-17T15:15:14Z
audio: Chanson Triste, Op. 40, No. 2 - Welte-Mignon_1362
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  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
    type: PropertyValue
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Nutcracker Suite, Op. 17a (Arr. Solo Piano by Giorni): Dance of the Reed Flutes (Danse Des Mirlitons) - Duo-Art 6132
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by artist: Joanna Sochacka
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genre: classical piano
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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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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-04T14:03:39Z
audio: Nutcracker Suite, Op. 17a (Arr. Solo Piano by Giorni): Dance of the Reed Flutes (Danse Des Mirlitons) - Duo-Art 6132
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Piano Sonata No. 14, Op. 27, No.2 "Moonlight": II. Allegretto
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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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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-04T10:04:33Z
audio: Piano Sonata No. 14, Op. 27, No.2 "Moonlight": II. Allegretto
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Piano Sonata, Op. 27 No. 2, Moonlight: II. Allegretto - Trio - Welte-Mignon 1246
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genre: classical piano
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-04T10:04:33Z
audio: Piano Sonata, Op. 27 No. 2, Moonlight: II. Allegretto - Trio - Welte-Mignon 1246
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Chanson Triste, Op. 40, No. 2 - Duo-Art 5957
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genre: classical piano
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-05T01:12:41Z
audio: Chanson Triste, Op. 40, No. 2 - Duo-Art 5957
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Humoresque, Op. 10, No. 2 in G Major (Based on a French Popular Song) - Duo-Art D661
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duration: PT2M40S
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explicit: false
by artist: Joanna Sochacka
in album: "094 Classical & Contemporary Essentials" - Aura
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genre: classical piano
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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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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-04T10:04:33Z
audio: Humoresque, Op. 10, No. 2 in G Major (Based on a French Popular Song) - Duo-Art D661
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Chant Sans Paroles. Op. 2, No. 3 - Duo-Art 7154
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genre: classical piano
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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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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-04T10:04:33Z
audio: Chant Sans Paroles. Op. 2, No. 3 - Duo-Art 7154
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The Seasons. Op. 37A.: No. 11, Troika (November) - Welte-Mignon 1956
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-05T01:12:41Z
audio: The Seasons. Op. 37A.: No. 11, Troika (November) - Welte-Mignon 1956
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Gavotte in F Major, WoO Anh.8 - Duo-Art S-3044
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-05T01:12:41Z
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Piano Sonata No. 16 K. 545 'Sonata Semplice': I. Allegro - Upon Aeolian Roll
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-04T10:04:33Z
audio: Piano Sonata No. 16 K. 545 'Sonata Semplice': I. Allegro - Upon Aeolian Roll
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Dialogue, Op. 72, No. 8
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-18T02:58:58Z
audio: Dialogue, Op. 72, No. 8
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The Seasons, Op. 37a: No. 12, Noel (December) - Duo-Art 70829
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-18T19:24:05Z
audio: The Seasons, Op. 37a: No. 12, Noel (December) - Duo-Art 70829
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The Seasons, Op. 37a: No. 10, Autumn Song (October) - Duo-Art 73520
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-05T10:01:46Z
audio: The Seasons, Op. 37a: No. 10, Autumn Song (October) - Duo-Art 73520
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Piano Sonata No. 11 in A Major, K.331: III. Alla Turca
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-05T01:12:41Z
audio: Piano Sonata No. 11 in A Major, K.331: III. Alla Turca
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Symphony No. 41, 'Jupyter', K. 551 (Arr. Solo Piano by Ganz): III. Menuetto. Allegretto - Trio - Duo-Art 5440
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subject of: OpenTimestamps Proof of Existence
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Nutcracker Suite (Pt. 1) - Welte-Mignon 2995
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Chant Polonaise No. 5, S.480, Transcription of Chopin's My Joys (Polish Songs) Op. 74, No .12 - Welte-Mignon 1035
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Piano Sonata No. 11, K.331 in A Major: III. Rondo Alla Turca - Welte-Mignon 1206
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Valse Sentimentale. Op. 51, No. 6 - Welte-Mignon 1679
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  date published: 2026-07-05T10:01:46Z
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Romanze in A-Flat Major (Incomplete Attr. To Mozart, Monatsbericht -1851- K.Anh.C 27.04) - Duo-Art 7295
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Iphigenie in Aulis: Gavotte in A Major (Arr. Solo Piano by Brahms) - Duo-Art 6476
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Piano Sonata No. 18 in in D Major, K. 576: III. Alegretto - Duo-Art 67850
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-20T02:22:58Z
audio: Piano Sonata No. 18 in in D Major, K. 576: III. Alegretto - Duo-Art 67850
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6 Pieces, Op. 19: Nocturno, Op. 19, No. 4
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by artist: Joanna Sochacka
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genre: classical piano
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. 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: 2026-07-20T08:32:30Z
audio: 6 Pieces, Op. 19: Nocturno, Op. 19, No. 4
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Divertimento K. 334: Minuet (Arr. Solo Piano by Bauer) - Duo-Art 74110
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duration: PT4M12S
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by artist: Joanna Sochacka
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genre: classical piano
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8227b8e3edcf2f2a8c5fe4b7ff6f41544a4e45261d705734b52f55560163e080. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82446416.
  date published: 2026-07-20T11:48:10Z
audio: Divertimento K. 334: Minuet (Arr. Solo Piano by Bauer) - Duo-Art 74110
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The Seasons, Op, 37a: No. 10, Autumn Song (October)
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in album: "094 Classical & Contemporary Essentials" - Aura
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genre: classical piano
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-20T09:11:53Z
audio: The Seasons, Op, 37a: No. 10, Autumn Song (October)
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The Seasons, Op. 37a: No. 6, Barcarolle (June) - Duo-Art 7128
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genre: classical piano
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T06:56:49Z
audio: The Seasons, Op. 37a: No. 6, Barcarolle (June) - Duo-Art 7128
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Fantasia in D Minor, K. 397 - Duo-Art 5677
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duration: PT4M30S
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genre: classical piano
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T06:56:49Z
audio: Fantasia in D Minor, K. 397 - Duo-Art 5677
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Fantasia in D Minor, K.397 - Upon Aeolian Roll
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duration: PT4M30S
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genre: classical piano
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T06:56:49Z
audio: Fantasia in D Minor, K.397 - Upon Aeolian Roll
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Chaconne in G Major, HWV 435 - Welte-Mignon_3406
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in album: "094 Classical & Contemporary Essentials" - Aura
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On an Overgrown Path, Book I: VII. Good Night!
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The Nutcracker Suite, Op. 71a (Arr. 4 Hands Piano by Langer-Sternberg): March
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The Nutcracker Suite, Op. 71a (Arr. 4 Hands Piano by Langer-Sternberg): Dance of the Reed Flutes
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The Nutcracker Suite, Op. 71a (Arr. 4 Hands Piano): Arab Dance
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Prelude in B Minor BWV 855a (Arr. By Siloti)
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Etude, Op. 25 No. 1 - Duo-Art 5695
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Six Studies in English Folk Song (Arr. Flute & Piano by Katrina Penman): Vi. Allegro Vivace
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subject of: OpenTimestamps Proof of Existence
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audio: Six Studies in English Folk Song (Arr. Flute & Piano by Katrina Penman): Vi. Allegro Vivace
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Humoreske, Op. 20: Vi. Mit Einigem Pomp
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subject of: OpenTimestamps Proof of Existence
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Xàfec de Llum I Tenebres: IV. Iridiscente
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-05T10:01:46Z
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Le Joie de Pierre-Auguste: Andante. Astor in aeternam...
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-05T10:01:46Z
audio: Le Joie de Pierre-Auguste: Andante. Astor in aeternam...
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3 Miniatures for Clarinet and Piano (I. Allegro II. Andante Cantabile III. Allegro Ma Non Troppo)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T12:33:25Z
audio: 3 Miniatures for Clarinet and Piano (I. Allegro II. Andante Cantabile III. Allegro Ma Non Troppo)
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Two Part Inventions: No. 8, BWV 779 - Duo-Art 6392
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-20T14:57:46Z
audio: Two Part Inventions: No. 8, BWV 779 - Duo-Art 6392
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Etude, Op. 25, No.9 (Butterfly) G-Flat Major - Duo-Art 5649
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T10:01:58Z
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Prelude, Op. 28, No. 23 in F Major
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T17:48:40Z
audio: Prelude, Op. 28, No. 23 in F Major
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Prelude, Op. 28, No. 16 in B-Flat Minor - Duo-Art 035 Br
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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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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T17:48:40Z
audio: Prelude, Op. 28, No. 16 in B-Flat Minor - Duo-Art 035 Br
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Well Tempered Clavier, Book I: Prelude No. 5 in D Major, BWV 850 - Welte-Mignon 1836
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in album: "090 Classical Melodies" - Das Lebewohl
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genre: classical piano
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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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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  date published: 2026-07-06T06:56:49Z
audio: Well Tempered Clavier, Book I: Prelude No. 5 in D Major, BWV 850 - Welte-Mignon 1836
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Etudes, Op. 25: No. 9 (Butterfly) in G-Flat Major - Welte-Mignon 1253
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T06:56:49Z
audio: Etudes, Op. 25: No. 9 (Butterfly) in G-Flat Major - Welte-Mignon 1253
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Well-Tempered Clavier, Book I: Prelude No. 5 in D Major BWV 850 - Duo-Art 5650
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duration ms: 71099
explicit: false
by artist: Joanna Sochacka
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genre: classical piano
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T15:38:35Z
audio: Well-Tempered Clavier, Book I: Prelude No. 5 in D Major BWV 850 - Duo-Art 5650
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Well-Tempered Clavier, Book II: Fugue No. 12 in F Minor, BWV 881 - Welte-Mignon 544
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by artist: Joanna Sochacka
in album: "090 Classical Melodies" - Das Lebewohl
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genre: classical piano
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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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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T07:16:32Z
audio: Well-Tempered Clavier, Book II: Fugue No. 12 in F Minor, BWV 881 - Welte-Mignon 544
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3 Nouvelles Études, B. 130: No. 3, Allegretto in D♭ Major
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genre: classical piano
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T11:35:32Z
audio: 3 Nouvelles Études, B. 130: No. 3, Allegretto in D♭ Major
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Well-Tempered Clavier, Book I: Prelude in C Sharp Major, No. 3 BWV 848
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T15:38:35Z
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Well Tempered Clavier, Book I: Prelude No. 12 in F Minor, BWV 857 - Welte-Mignon 2965
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T07:53:57Z
audio: Well Tempered Clavier, Book I: Prelude No. 12 in F Minor, BWV 857 - Welte-Mignon 2965
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Etudes, Op. 25: No. 2 (The Bees), in F Minor - Duo-Art 6349
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T06:56:49Z
audio: Etudes, Op. 25: No. 2 (The Bees), in F Minor - Duo-Art 6349
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3 Nouvelles Études, B. 130: No. 1, Andantino in F Minor - Duo-Art 7451
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T06:56:49Z
audio: 3 Nouvelles Études, B. 130: No. 1, Andantino in F Minor - Duo-Art 7451
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Piano Sonata No. 14, Op. 27 No. 2 Quasi Una Fantasia: II. Allegretto - Duo-Art 6102
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T16:23:52Z
audio: Piano Sonata No. 14, Op. 27 No. 2 Quasi Una Fantasia: II. Allegretto - Duo-Art 6102
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Violin Sonata No. 2 (Arr. Solo Piano by Saint-Saëns): Bourree, in B Minor
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T07:53:57Z
audio: Violin Sonata No. 2 (Arr. Solo Piano by Saint-Saëns): Bourree, in B Minor
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Toccata in G Major BWV 916, No. 3 - Duo-Art 72369
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T11:35:32Z
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Slavic Whispers: Piano Music for 4 Hands
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date published: 2025-09-26

"069 Classical Piano Evocations": Ballabiles
type: MusicAlbum
date published: 2025-10-11

"072 Hidden Treasures of Piano": Bal Fantome
type: MusicAlbum
date published: 2025-10-28

Deutscher Tanz in F Major Hob.IX 10
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Etude No. 6
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Menuetto in F Major K6 Anh.B
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by artist: Joanna Sochacka
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T17:48:40Z
audio: Menuetto in F Major K6 Anh.B
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Nocturne from the Composition Notebook
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by artist: Joanna Sochacka
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T15:38:35Z
audio: Nocturne from the Composition Notebook
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Menuet in C Major KV 1f
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by artist: Joanna Sochacka
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Menuet in C Major KV 1f
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Nocturne in B Major, Op. 62 No.1
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subject of: OpenTimestamps Proof of Existence
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