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genre: chamber music
description: Matthias Rácz (born 1980) is a German bassoonist. Career Rácz was born in Berlin and began his musical education at the age of 6, first on the piano and at 10 also on the bassoon. During his school
popularity: 26
followers: 1083
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album: Françaix, Schnyder & Others: Chamber Music
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album: Kaleidoskop: Works for Contrabassoon
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    by artist: Tonhalle-Orchester Zürich
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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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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-30T00:11:40Z
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  track: 6 Stücke, Op. 80: No. 3, Andante tranquillo
  track: Soledad
album: Mozart & Beethoven: Septets
album: Vivaldi: Oboe & Bassoon Concertos
album: Mozart: Sonata for Bassoon & Cello in B-Flat Major, K. 292 - Devienne: Bassoon Quartets, Op. 73
album: Françaix, Tomasi, Jolivet & Villa-Lobos: Bassoon Concertos
album: Weber, Mozart & Hummel: Bassoon Concertos
album: Schumann, R.: 5 Stucke Im Volkston / Adagio and Allegro / Fantasiestucke / Waldszenen (Arr. for Bassoon and Piano)
album: Pleyel: Vol. 9 - Concerti & Symphonies

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Contrabassoon Sonata, DWV 133: II. Etwas bewegt
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T14:53:07Z
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Contrabassoon Sonata, DWV 133: III. Lebhaft
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subject of: OpenTimestamps Proof of Existence
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2 Stücke, Op. 57: No 1, Andante
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subject of: OpenTimestamps Proof of Existence
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2 Stücke, Op. 57: No. 2, Tempo di valse grazioso
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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 0x0f16d7a05a48874d0e306760a321ec38f60661d91f444b1e8194e51b61039f22. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21926546 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: 2 Stücke, Op. 57: No. 2, Tempo di valse grazioso
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  additional property: Tempo (BPM)
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  additional property: Musical Key
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    value: 1
  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  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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    value: -24.854
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major

6 Stücke, Op. 80: No. 3, Andante tranquillo
type: MusicRecording
duration: PT3M30S
duration ms: 210000
explicit: false
by artist: Victor Bruns
by artist: Hans Agreda
by artist: Anna Kirichenko
in album: Kaleidoskop: Works for Contrabassoon
  type: MusicAlbum
  date published: 2019-08-09
isrc code: DEFG21926549
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T14:40:20+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf0466bd8ff6a7fb60955c3c763c2153fc0da1aceafb3f95d6cd0c7d48a9e4e05
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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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/DEFG21926549
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 0xf0466bd8ff6a7fb60955c3c763c2153fc0da1aceafb3f95d6cd0c7d48a9e4e05. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21926549 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: 6 Stücke, Op. 80: No. 3, Andante tranquillo
  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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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.21
  additional property: Energy
    type: PropertyValue
    value: 0.008
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.994
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.924
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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    value: 0.058
  additional property: Loudness (dB)
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    value: -31.122
  additional property: Key Name
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  additional property: Mode Name
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Soledad
type: MusicRecording
duration: PT5M8S
duration ms: 308040
explicit: false
by artist: Efraín Oscher
by artist: Hans Agreda
by artist: Emanuel Forni
by artist: Tonhalle-Orchester Zürich
by artist: Paulo Muñoz-Toledo
in album: Kaleidoskop: Works for Contrabassoon
  type: MusicAlbum
  date published: 2019-08-09
isrc code: DEFG21926556
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T23:40:57+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7053e1406483db413ec0cadd0aeda9e65a2fc1a0be7570576d6ff91b80077744
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960481
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960481
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21926556
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T23:51:35Z
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 0x7053e1406483db413ec0cadd0aeda9e65a2fc1a0be7570576d6ff91b80077744. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21926556 — a six-check JSON result.
  date published: 2026-07-31T23:51:35Z
audio: Soledad
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 105.011
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.103
  additional property: Energy
    type: PropertyValue
    value: 0.037
  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
    value: 0.922
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.884
  additional property: Liveness
    type: PropertyValue
    value: 0.108
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.089
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.127
  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
    type: PropertyValue
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Mozart & Beethoven: Septets
type: MusicAlbum
date published: 2021-02-12
track: Septet in E-Flat Major, Op. 20: I. Adagio - Allegro con brio
  type: MusicRecording
  duration: PT10M18S
  duration ms: 618346
  explicit: false
  by artist: Ludwig van Beethoven
  by artist: Vicente Alberola
  by artist: Matthias Rácz
  by artist: Stefan Dohr
  by artist: Raphael Christ
  by artist: Wolfram Christ
  by artist: Jens Peter Maintz
  by artist: Rick Stotijn
  in album: Mozart & Beethoven: Septets
    type: MusicAlbum
    date published: 2021-02-12
  genre: classical
  genre: classical-piano
  genre: chamber-music
  isrc code: DERK62053607
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T17:23:24+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x604a582038b1f56edd4d1ee7b055fc81ff98cd5ad6734f94628bf2ab929a39a4
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
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  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/DERK62053607
  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 0x604a582038b1f56edd4d1ee7b055fc81ff98cd5ad6734f94628bf2ab929a39a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DERK62053607 — a six-check JSON result.
    date published: 2026-07-08T03:20:19Z
  audio: Septet in E-Flat Major, Op. 20: I. Adagio - Allegro con brio
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 106.175
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.374
    additional property: Energy
      type: PropertyValue
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    additional property: Speechiness
      type: PropertyValue
      value: 0.047
    additional property: Acousticness
      type: PropertyValue
      value: 0.935
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.492
    additional property: Liveness
      type: PropertyValue
      value: 0.243
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.241
    additional property: Loudness (dB)
      type: PropertyValue
      value: -21.299
    additional property: Key Name
      type: PropertyValue
      value: Eb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Septet in E-Flat Major, Op. 20: III. Tempo di minuetto
  type: MusicRecording
  duration: PT3M3S
  duration ms: 183986
  explicit: false
  by artist: Ludwig van Beethoven
  by artist: Vicente Alberola
  by artist: Matthias Rácz
  by artist: Stefan Dohr
  by artist: Raphael Christ
  by artist: Wolfram Christ
  by artist: Jens Peter Maintz
  by artist: Rick Stotijn
  in album: Mozart & Beethoven: Septets
    type: MusicAlbum
    date published: 2021-02-12
  genre: classical
  genre: classical-piano
  genre: chamber-music
  isrc code: DERK62053609
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T20:14:20+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8970080a84a34df1e998ad44650d9e7bc52c07754ac056f702cf2e449454e873
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957120
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957120
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DERK62053609
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:22:41Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8970080a84a34df1e998ad44650d9e7bc52c07754ac056f702cf2e449454e873. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DERK62053609 — a six-check JSON result.
    date published: 2026-07-08T03:22:41Z
  audio: Septet in E-Flat Major, Op. 20: III. Tempo di minuetto
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 137.658
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.508
    additional property: Energy
      type: PropertyValue
      value: 0.093
    additional property: Speechiness
      type: PropertyValue
      value: 0.04
    additional property: Acousticness
      type: PropertyValue
      value: 0.942
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.462
    additional property: Liveness
      type: PropertyValue
      value: 0.181
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.384
    additional property: Loudness (dB)
      type: PropertyValue
      value: -21.097
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major

Vivaldi: Oboe & Bassoon Concertos
type: MusicAlbum
date published: 2017-01-20
track: Bassoon Concerto in E-Flat Major, RV 483: I. Presto
  type: MusicRecording
  duration: PT2M16S
  duration ms: 136000
  explicit: false
  by artist: Antonio Vivaldi
  by artist: Matthias Rácz
  by artist: Kurpfälzisches Kammerorchester
  by artist: Johannes Schlaefli
  in album: Vivaldi: Oboe & Bassoon Concertos
    type: MusicAlbum
    date published: 2017-01-20
  genre: classical
  genre: early-music
  genre: baroque
  genre: concerto
  isrc code: DEFG21620801
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-22T14:46:26+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xa220dd551c378391316cee1539b2ad83076941f1a4448fcf44804dbda677f641
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959144
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959144
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21620801
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-22T15:38:35Z
  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 0xa220dd551c378391316cee1539b2ad83076941f1a4448fcf44804dbda677f641. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21620801 — a six-check JSON result.
    date published: 2026-07-22T15:38:35Z
  audio: Bassoon Concerto in E-Flat Major, RV 483: I. Presto
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 143.542
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.403
    additional property: Energy
      type: PropertyValue
      value: 0.457
    additional property: Speechiness
      type: PropertyValue
      value: 0.033
    additional property: Acousticness
      type: PropertyValue
      value: 0.962
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.964
    additional property: Liveness
      type: PropertyValue
      value: 0.143
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.697
    additional property: Loudness (dB)
      type: PropertyValue
      value: -18.127
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Bassoon Concerto in E-Flat Major, RV 483: II. Larghetto
  type: MusicRecording
  duration: PT2M32S
  duration ms: 152000
  explicit: false
  by artist: Antonio Vivaldi
  by artist: Matthias Rácz
  by artist: Kurpfälzisches Kammerorchester
  by artist: Johannes Schlaefli
  in album: Vivaldi: Oboe & Bassoon Concertos
    type: MusicAlbum
    date published: 2017-01-20
  genre: classical
  genre: early-music
  genre: baroque
  genre: concerto
  isrc code: DEFG21620802
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T14:53:46+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb34abfbfe377fb4c685e7ffc9b6bba0131b39f057c7ca7f0f503f7a799ae3fe1
  additional property: OTSHash
  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960273
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21620802
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T15:42:38Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34abfbfe377fb4c685e7ffc9b6bba0131b39f057c7ca7f0f503f7a799ae3fe1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21620802 — a six-check JSON result.
    date published: 2026-07-30T15:42:38Z
  audio: Bassoon Concerto in E-Flat Major, RV 483: II. Larghetto
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 117.138
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.207
    additional property: Energy
      type: PropertyValue
      value: 0.036
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track: Oboe Concerto in A Minor, RV 461: I. Allegro non molto
track: Oboe Concerto in A Minor, RV 461: II. Larghetto
track: Oboe Concerto in A Minor, RV 461: III. Allegro
track: Bassoon Concerto in G Major, RV 493: I. Allegro ma poco
track: Bassoon Concerto in G Major, RV 493: II. Largo
track: Bassoon Concerto in G Major, RV 493: III. Allegro
track: Oboe Concerto in D Major, RV 453: I. Allegro
track: Oboe Concerto in D Major, RV 453: II. Largo
track: Oboe Concerto in D Major, RV 453: III. Allegro
track: Bassoon Concerto in E Minor, RV 484: I. Allegro poco
track: Bassoon Concerto in E Minor, RV 484: II. Andante
track: Bassoon Concerto in E Minor, RV 484: III. Allegro
track: Oboe Concerto in F Major, RV 457: I. Allegro non molto
track: Oboe Concerto in F Major, RV 457: II. Andante
track: Oboe Concerto in F Major, RV 457: III. Allegro molto
track: Concerto for Oboe & Bassoon in G Major, RV 545: I. Andante molto
track: Concerto for Oboe & Bassoon in G Major, RV 545: II. Largo
track: Concerto for Oboe & Bassoon in G Major, RV 545: III. Allegro molto

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date published: 2026-07-29T19:35:34Z

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Oboe Concerto in A Minor, RV 461: I. Allegro non molto
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  date published: 2026-07-29T19:35:34Z
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Oboe Concerto in A Minor, RV 461: III. Allegro
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subject of: OpenTimestamps Proof of Existence
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T01:32:48Z
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subject of: OpenTimestamps Proof of Existence
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by artist: Johannes Schlaefli
in album: Vivaldi: Oboe & Bassoon Concertos
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T00:26:26Z
audio: Bassoon Concerto in G Major, RV 493: III. Allegro
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Oboe Concerto in D Major, RV 453: I. Allegro
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by artist: Antonio Vivaldi
by artist: Simon Fuchs
by artist: Kurpfälzisches Kammerorchester
by artist: Johannes Schlaefli
in album: Vivaldi: Oboe & Bassoon Concertos
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genre: classical
genre: early-music
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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: 2026-07-31T00:26:26Z
audio: Oboe Concerto in D Major, RV 453: I. Allegro
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Oboe Concerto in D Major, RV 453: II. Largo
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duration: PT1M51S
duration ms: 111000
explicit: false
by artist: Antonio Vivaldi
by artist: Simon Fuchs
by artist: Kurpfälzisches Kammerorchester
by artist: Johannes Schlaefli
in album: Vivaldi: Oboe & Bassoon Concertos
  type: MusicAlbum
  date published: 2017-01-20
genre: classical
genre: early-music
genre: baroque
genre: concerto
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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: 2026-07-30T07:28:30Z
audio: Oboe Concerto in D Major, RV 453: II. Largo
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Oboe Concerto in D Major, RV 453: III. Allegro
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duration: PT3M18S
duration ms: 198000
explicit: false
by artist: Antonio Vivaldi
by artist: Simon Fuchs
by artist: Kurpfälzisches Kammerorchester
by artist: Johannes Schlaefli
in album: Vivaldi: Oboe & Bassoon Concertos
  type: MusicAlbum
  date published: 2017-01-20
genre: classical
genre: early-music
genre: baroque
genre: concerto
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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: Oboe Concerto in D Major, RV 453: III. Allegro
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Bassoon Concerto in E Minor, RV 484: I. Allegro poco
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duration: PT4M19S
duration ms: 259000
explicit: false
by artist: Antonio Vivaldi
by artist: Matthias Rácz
by artist: Kurpfälzisches Kammerorchester
by artist: Johannes Schlaefli
in album: Vivaldi: Oboe & Bassoon Concertos
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  date published: 2017-01-20
genre: classical
genre: early-music
genre: baroque
genre: concerto
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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: 2026-07-02T03:55:08Z
audio: Bassoon Concerto in E Minor, RV 484: I. Allegro poco
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Bassoon Concerto in E Minor, RV 484: II. Andante
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explicit: false
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by artist: Matthias Rácz
by artist: Kurpfälzisches Kammerorchester
by artist: Johannes Schlaefli
in album: Vivaldi: Oboe & Bassoon Concertos
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genre: classical
genre: early-music
genre: baroque
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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: 2026-07-30T07:28:30Z
audio: Bassoon Concerto in E Minor, RV 484: II. Andante
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Bassoon Concerto in E Minor, RV 484: III. Allegro
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by artist: Kurpfälzisches Kammerorchester
by artist: Johannes Schlaefli
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genre: classical
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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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Oboe Concerto in F Major, RV 457: I. Allegro non molto
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Oboe Concerto in F Major, RV 457: II. Andante
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Oboe Concerto in F Major, RV 457: III. Allegro molto
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Concerto for Oboe & Bassoon in G Major, RV 545: I. Andante molto
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Concerto for Oboe & Bassoon in G Major, RV 545: II. Largo
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Concerto for Oboe & Bassoon in G Major, RV 545: III. Allegro molto
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Mozart: Sonata for Bassoon & Cello in B-Flat Major, K. 292 - Devienne: Bassoon Quartets, Op. 73
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Françaix, Tomasi, Jolivet & Villa-Lobos: Bassoon Concertos
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  subject of: OpenTimestamps Proof of Existence
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:30:09Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:30:09Z
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  audio: Bassoon Concerto in F Major, Op. 75, J. 127: III. Rondo: Allegro
track: Bassoon Concerto in B-Flat Major, K. 191: I. Allegro
track: Bassoon Concerto in B-Flat Major, K. 191: II. Andante ma adagio
track: Bassoon Concerto in B-Flat Major, K. 191: III. Rondo: Tempo di menuetto
track: Bassoon Concerto in F Major, WoO 23, S63: I. Allegro moderato
track: Bassoon Concerto in F Major, WoO 23, S63: II. Romanza: Andantino e cantabile
track: Bassoon Concerto in F Major, WoO 23, S63: III. Rondo: Vivace
track: Andante e Rondo ungarese, Op. 35, J. 158

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date published: 2026-07-02T03:30:09Z

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subject of: OpenTimestamps Proof of Existence
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0x5bc1c1c6116134304ac0bb8fecf749778de10b6e280b6a47d99730704244d9ad. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21312405 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: Bassoon Concerto in B-Flat Major, K. 191: II. Andante ma adagio
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Bassoon Concerto in B-Flat Major, K. 191: III. Rondo: Tempo di menuetto
type: MusicRecording
duration: PT4M17S
duration ms: 257986
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Matthias Rácz
by artist: North West German Philharmonic Orchestra
by artist: Johannes Klumpp
in album: Weber, Mozart & Hummel: Bassoon Concertos
  type: MusicAlbum
  date published: 2013-06-04
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEFG21312406
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/DEFG21312406
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 0xcb7aee899e6f178b912b97fbc5d3b2d36ad4888c41d466459dde6d3ccd40a825. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21312406 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: Bassoon Concerto in B-Flat Major, K. 191: III. Rondo: Tempo di menuetto
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Bassoon Concerto in F Major, WoO 23, S63: I. Allegro moderato
type: MusicRecording
duration: PT10M50S
duration ms: 650986
explicit: false
by artist: Johann Nepomuk Hummel
by artist: Matthias Rácz
by artist: North West German Philharmonic Orchestra
by artist: Johannes Klumpp
in album: Weber, Mozart & Hummel: Bassoon Concertos
  type: MusicAlbum
  date published: 2013-06-04
isrc code: DEFG21312407
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/DEFG21312407
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0xc00f5ec8d2852e5c2319f24d2e72d92b97d308a44c665d452cd6769f35c3a368. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21312407 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: Bassoon Concerto in F Major, WoO 23, S63: I. Allegro moderato
  type: AudioObject
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Bassoon Concerto in F Major, WoO 23, S63: II. Romanza: Andantino e cantabile
type: MusicRecording
duration: PT6M31S
duration ms: 391986
explicit: false
by artist: Johann Nepomuk Hummel
by artist: Matthias Rácz
by artist: North West German Philharmonic Orchestra
by artist: Johannes Klumpp
in album: Weber, Mozart & Hummel: Bassoon Concertos
  type: MusicAlbum
  date published: 2013-06-04
isrc code: DEFG21312408
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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c58c7314991628d9aa977d6ea2eb9b2a13f052d3886fe16cddcfdba81a4e009. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21312408 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: Bassoon Concerto in F Major, WoO 23, S63: II. Romanza: Andantino e cantabile
  type: AudioObject
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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Bassoon Concerto in F Major, WoO 23, S63: III. Rondo: Vivace
type: MusicRecording
duration: PT7M53S
duration ms: 473986
explicit: false
by artist: Johann Nepomuk Hummel
by artist: Matthias Rácz
by artist: North West German Philharmonic Orchestra
by artist: Johannes Klumpp
in album: Weber, Mozart & Hummel: Bassoon Concertos
  type: MusicAlbum
  date published: 2013-06-04
isrc code: DEFG21312409
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
  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 0x3cd37e71eb427918a5246cd93d23fed645ba417ad81bcd660ff7d637b929a200. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21312409 — a six-check JSON result.
  date published: 2026-07-06T01:25:57Z
audio: Bassoon Concerto in F Major, WoO 23, S63: III. Rondo: Vivace
  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: Valence (Positivity)
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Andante e Rondo ungarese, Op. 35, J. 158
type: MusicRecording
duration: PT10M26S
duration ms: 626186
explicit: false
by artist: Carl Maria von Weber
by artist: Matthias Rácz
by artist: North West German Philharmonic Orchestra
by artist: Johannes Klumpp
in album: Weber, Mozart & Hummel: Bassoon Concertos
  type: MusicAlbum
  date published: 2013-06-04
genre: classical
genre: opera
isrc code: DEFG21312410
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/DEFG21312410
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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 0xdc759627c9c91dc849037ad41967f75c49348854f67a83be11050ab1575630e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21312410 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: Andante e Rondo ungarese, Op. 35, J. 158
  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: Valence (Positivity)
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  additional property: Loudness (dB)
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Schumann, R.: 5 Stucke Im Volkston / Adagio and Allegro / Fantasiestucke / Waldszenen (Arr. for Bassoon and Piano)
type: MusicAlbum
date published: 2008-01-01
track: 5 Stucke im Volkston (5 Pieces in Folk Style), Op. 102 (arr. for bassoon and piano): No. 1. Mit Humor, "Vanitas vanitatum"
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  duration ms: 177000
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  by artist: Robert Schumann
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  by artist: Yu Kosuge
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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 0xc7aeb0714700746d536e8a45494be733e9df458661d0b386a5b10c1f47f99a3c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG20803401 — a six-check JSON result.
    date published: 2026-07-31T19:53:13Z
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track: Waldszenen, Op. 82 (arr. M. Racz for oboe and piano after W. Renz's arrangement for oboe and piano): No. 3. Einsame Blumen

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Pleyel: Vol. 9 - Concerti & Symphonies
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date published: 2012-10-02