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description: Jac van Steen (born 1956 in Eindhoven) is a Dutch conductor. He studied music theory, as well as orchestral and choral conducting, at the . In the Netherlands, van Steen was conductor and music direc
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album: The Deeper the Blue...
album: Jürg Dähler · Viola Concertos / Signatures of Life – LIVE!
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The Deeper the Blue...
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Jürg Dähler · Viola Concertos / Signatures of Life – LIVE!
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track: Concerto for 2 Pianos in E-Flat Major, K. 365: I. Allegro
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  subject of: OpenTimestamps Proof of Existence
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track: Concerto for 2 Pianos in E-Flat Major, K. 365: II. Andante
track: Piano Concerto No. 20 in D Minor, K. 466: III. Allegro assai
track: Concerto for 2 Pianos in E-Flat Major, K. 365: III. Allegro
track: Piano Concerto No. 21 in C Major, K. 467 "Elvira Madigan": I. Allegro maestoso
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track: Piano Concerto No. 21 in C Major, K. 467 "Elvira Madigan": II. Andante
track: Sonata for 2 Pianos in D Major, K. 448: II. Andante
track: Piano Concerto No. 21 in C Major, K. 467 "Elvira Madigan": III. Allegro vivace assai
track: Sonata for 2 Pianos in D Major, K. 448: III. Allegro molto
track: Fantasia in C Minor, K. 396 (Arr. & Completed by M. Stadler for Piano)
track: Concerto for 3 Pianos in F Major, K. 242 "Lodron": I. Allegro
track: Concerto for 3 Pianos in F Major, K. 242 "Lodron": II. Adagio
track: Concerto for 3 Pianos in F Major, K. 242 "Lodron": III. Rondeau. Tempo di menuetto

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Concerto for 2 Pianos in E-Flat Major, K. 365: III. Allegro
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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: 2026-07-30T04:47:22Z
audio: Piano Concerto No. 21 in C Major, K. 467 "Elvira Madigan": II. Andante
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Sonata for 2 Pianos in D Major, K. 448: II. Andante
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duration: PT9M13S
duration ms: 553174
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Valerie Tryon
by artist: Peter Donohoe
in album: Mozart: Piano Concertos, K. 242, 365, 466 & 467
  type: MusicAlbum
  date published: 2018-04-06
popularity: 1
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: GBBZS1826812
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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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: 2026-08-01T02:22:04Z
audio: Sonata for 2 Pianos in D Major, K. 448: II. Andante
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Piano Concerto No. 21 in C Major, K. 467 "Elvira Madigan": III. Allegro vivace assai
type: MusicRecording
duration: PT7M51S
duration ms: 471014
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Valerie Tryon
by artist: Royal Philharmonic Orchestra
by artist: Jac van Steen
in album: Mozart: Piano Concertos, K. 242, 365, 466 & 467
  type: MusicAlbum
  date published: 2018-04-06
popularity: 7
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: GBBZS1826806
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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: 2026-07-06T06:56:49Z
audio: Piano Concerto No. 21 in C Major, K. 467 "Elvira Madigan": III. Allegro vivace assai
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Sonata for 2 Pianos in D Major, K. 448: III. Allegro molto
type: MusicRecording
duration: PT6M34S
duration ms: 394574
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Valerie Tryon
by artist: Peter Donohoe
in album: Mozart: Piano Concertos, K. 242, 365, 466 & 467
  type: MusicAlbum
  date published: 2018-04-06
popularity: 1
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: GBBZS1826813
additional property: CopyrightID
additional property: CopyrightStatus
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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
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  date published: 2026-07-08T03:22:41Z
audio: Sonata for 2 Pianos in D Major, K. 448: III. Allegro molto
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Fantasia in C Minor, K. 396 (Arr. & Completed by M. Stadler for Piano)
type: MusicRecording
duration: PT11M14S
duration ms: 674281
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Valerie Tryon
in album: Mozart: Piano Concertos, K. 242, 365, 466 & 467
  type: MusicAlbum
  date published: 2018-04-06
popularity: 1
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: GBBZS1826807
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
  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 0x027265cfc3d110f1528882ff046e1d69aaa0f2eeace272915cca0d9b9930deda. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBZS1826807.
  date published: 2026-07-31T19:53:13Z
audio: Fantasia in C Minor, K. 396 (Arr. & Completed by M. Stadler for Piano)
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  additional property: Acousticness
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Concerto for 3 Pianos in F Major, K. 242 "Lodron": I. Allegro
type: MusicRecording
duration: PT9M7S
duration ms: 547027
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Peter Donohoe
by artist: Valerie Tryon
by artist: Mishka Rushdie Momen
by artist: Royal Philharmonic Orchestra
by artist: Boris Brott
in album: Mozart: Piano Concertos, K. 242, 365, 466 & 467
  type: MusicAlbum
  date published: 2018-04-06
popularity: 1
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: GBBZS1826814
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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  value: 2026-07-07T15:02:53+00:00
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 0xda358a507cb5b451a2764156e902774df7d6c111afb53721c209c41cbcb54fde. 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/GBBZS1826814.
  date published: 2026-07-08T03:20:19Z
audio: Concerto for 3 Pianos in F Major, K. 242 "Lodron": I. Allegro
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Concerto for 3 Pianos in F Major, K. 242 "Lodron": II. Adagio
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duration: PT8M8S
duration ms: 488014
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Peter Donohoe
by artist: Valerie Tryon
by artist: Mishka Rushdie Momen
by artist: Royal Philharmonic Orchestra
by artist: Boris Brott
in album: Mozart: Piano Concertos, K. 242, 365, 466 & 467
  type: MusicAlbum
  date published: 2018-04-06
popularity: 3
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: GBBZS1826815
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
  type: PropertyValue
  value: 2026-07-31T12:24:41Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a5151b242437fc51bd50a02c16c7b4916cd837ce13724ac22959762bbd4d30. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBZS1826815.
  date published: 2026-07-31T12:24:41Z
audio: Concerto for 3 Pianos in F Major, K. 242 "Lodron": II. Adagio
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Concerto for 3 Pianos in F Major, K. 242 "Lodron": III. Rondeau. Tempo di menuetto
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by artist: Wolfgang Amadeus Mozart
by artist: Peter Donohoe
by artist: Valerie Tryon
by artist: Mishka Rushdie Momen
by artist: Royal Philharmonic Orchestra
by artist: Boris Brott
in album: Mozart: Piano Concertos, K. 242, 365, 466 & 467
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