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album: A Guided Tour of Nationalism in the Romantic Era, Vol. 3
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album: Easy-Listening Piano Classics: Schubert
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album: Discover Chamber Music
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album: A Guided Tour of Nationalism in the Romantic Era, Vol. 7
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album: Dvorak (The Very Best Of)
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album: A Guided Tour of the Romantic Era, Vol. 12
album: Toy Symphony: And Other Fun Classical Favourites
album: Takako Nishizaki Plays Suzuki Evergreens, Vol. 1
album: Brahms: Four-Hand Piano Music, Vol. 18
album: Brahms: Four-Hand Piano Music, Vol. 17
album: Brahms: Four-Hand Piano Music, Vol. 13
album: Brahms: Four-Hand Piano Music, Vol. 12
album: KLEBE: Poema drammatico / Widmungen / Zornige Lieder ohne Worte
album: Brahms: Four-Hand Piano Music, Vol. 11
album: Brahms: Four-Hand Piano Music, Vol. 10
album: Brahms: Four-Hand Piano Music, Vol. 9
album: Brahms: Four-Hand Piano Music, Vol. 8
album: Brahms: Four Hand Piano Music Vol. 8
album: Brahms: Four-Hand Piano Music, Vol. 6
album: Brahms: Four-Hand Piano Music, Vol. 5
album: Brahms: Four-Hand Piano Music, Vol. 4
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album: Klebe: Glockenturme / Wiegenlieder / Feuersturz / Sonata, Op. 4
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album: Dvorak: Four-Hand Piano Music, Vol. 1
album: Brahms: Four-Hand Piano Music, Vol. 16
album: Brahms: Four-Hand Piano Music, Vol. 15
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album: Min første klavermusik
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album: Naxos November 2013 New Release Sampler
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album: Brahms: Four-Hand Piano Music, Vol. 7
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Variations In E Flat Major On A Theme By Schumann, Op. 23: Variation 1
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16 Waltzes, Op. 39: Waltz 1
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  date published: 2026-07-08T03:22:41Z
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16 Waltzes, Op. 39: Waltz 2
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16 Waltzes, Op. 39: Waltz 4
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by artist: Christian Kohn
by artist: Silke-Thora Matthies
in album: Brahms: Four-Hand Piano Music, Vol. 1
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genre: classical
genre: german-romanticism
genre: late-romantic-era
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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
additional property: ProofProfileEvidenceStatus
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:39:04Z
audio: 16 Waltzes, Op. 39: Waltz 4
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16 Waltzes, Op. 39: Waltz 15
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by artist: Johannes Brahms
by artist: Christian Kohn
by artist: Silke-Thora Matthies
in album: Brahms: Four-Hand Piano Music, Vol. 1
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genre: german-romanticism
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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additional property: ProofProfileEvidenceStatus
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T15:41:10Z
audio: 16 Waltzes, Op. 39: Waltz 15
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16 Waltzes, Op. 39: Waltz 3
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duration ms: 53826
explicit: false
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by artist: Silke-Thora Matthies
by artist: Christian Kohn
in album: Brahms: Four-Hand Piano Music, Vol. 1
  type: MusicAlbum
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genre: classical
genre: german-romanticism
genre: late-romantic-era
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  date published: 2026-07-31T21:25:57Z
audio: 16 Waltzes, Op. 39: Waltz 3
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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

Souvenir De La Russe, Anh. IV/6: Die Nachtigall (The Nightingale)
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by artist: Johannes Brahms
by artist: Christian Kohn
by artist: Silke-Thora Matthies
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genre: classical
genre: german-romanticism
genre: late-romantic-era
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T15:20:15Z
audio: Souvenir De La Russe, Anh. IV/6: Die Nachtigall (The Nightingale)
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additional property: OTSVerifyInstructions
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Symphony No. 3 in F Major, Op. 90 (version for piano 4 hands): I. Allegro con brio
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by artist: Christian Kohn
by artist: Silke-Thora Matthies
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genre: classical
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additional property: OTSVerifyInstructions
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  date published: 2026-07-08T03:53:27Z
audio: Symphony No. 3 in F Major, Op. 90 (version for piano 4 hands): I. Allegro con brio
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Symphony No. 3 in F Major, Op. 90 (version for piano 4 hands): III. Un poco allegretto
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additional property: OTSVerifyInstructions
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  date published: 2026-06-13T12:47:07Z
audio: Symphony No. 3 in F Major, Op. 90 (version for piano 4 hands): III. Un poco allegretto
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Symphony No. 2 in D Major, Op. 73 (version for piano 4 hands): I. Allegro non troppo
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by artist: Silke-Thora Matthies
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genre: classical
genre: german-romanticism
genre: late-romantic-era
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T05:17:02Z
audio: Symphony No. 2 in D Major, Op. 73 (version for piano 4 hands): I. Allegro non troppo
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  date published: 2026-07-31T19:53:57Z
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A Guided Tour of the Romantic Era, Vol. 12
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Toy Symphony: And Other Fun Classical Favourites
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track: Cassation in G Major "Toy Symphony": I. Allegro
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track: The Four Seasons: Violin Concerto in G Minor, Op. 8, No. 2, RV 315, "L'estate" (Summer): I. Allegro non molto
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OTSBitcoinBlockVerifyURL
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OTSVerifyInstructions
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OpenTimestamps Proof of Existence
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date published: 2026-07-08T03:53:27Z

The Four Seasons: Violin Concerto in G Minor, Op. 8, No. 2, RV 315, "L'estate" (Summer): I. Allegro non molto
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Takako Nishizaki Plays Suzuki Evergreens, Vol. 1
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track: May Song (Arr. for Violin & Piano)
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  explicit: false
  by artist: Traditional
  by artist: Takako Nishizaki
  by artist: Terence Dennis
  in album: Takako Nishizaki Plays Suzuki Evergreens, Vol. 1
    type: MusicAlbum
    date published: 2010-05-25
  genre: bhajan
  genre: gregorian-chant
  genre: medieval
  genre: traditional-music
  isrc code: HKI190923306
  additional property: CopyrightID
  additional property: CopyrightStatus
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: May Song (Arr. for Violin & Piano)
track: Perpetual Motion in D Major
track: Andantino
track: Etude
track: Suite in G Minor, BWV 822: No. 7, Menuet III (Arr. for Violin & Piano)
track: Minuet in G Major, BWV Anh. 114 (Attrib. J. S. Bach) [Arr. for Violin & Piano]
track: Album für die Jugend, Op. 68: No. 10, Fröhlicher Landmann, von der Arbeit zurückkehrend
track: Judas Maccabaeus, HWV 63: See, the Conqu'ring Hero Comes (Arr. for Violin & Piano)
track: Mignon: Me voici dans son boudoir (Arr. for Violin & Piano)
track: Pièces de viole: No. 24, Rondeau (Attrib. Jean-Baptiste Lully) [Arr. for Violin & Piano]

CopyrightStatus
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CopyrightRegisteredAt
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CopyrightChainExplorerURL
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value: https://explorer.copyrightchains.com/tx/0x4a01d36eb270e0a650eeb2abe4e4fa6762e5090607bf2f7aae536a2877d5a349

OTSHash
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OTSBitcoinBlock
type: PropertyValue
value: 957124

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957124

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923306

OTSTimestamp
type: PropertyValue
value: 2026-07-08T03:53:27Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a01d36eb270e0a650eeb2abe4e4fa6762e5090607bf2f7aae536a2877d5a349. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI190923306.
date published: 2026-07-08T03:53:27Z

May Song (Arr. for Violin & Piano)
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
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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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Perpetual Motion in D Major
type: MusicRecording
duration: PT1M46S
duration ms: 106333
explicit: false
by artist: Shinichi Suzuki
by artist: Takako Nishizaki
by artist: Sarah Watkins
in album: Takako Nishizaki Plays Suzuki Evergreens, Vol. 1
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  date published: 2010-05-25
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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
  value: https://blockstream.info/api/block-height/957120
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923310
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975477dbc64148d19aabb3281888ce57c34a993dfa4bb0f73083d4a3d6403394. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923310.
  date published: 2026-07-08T03:22:41Z
audio: Perpetual Motion in D Major
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
    type: PropertyValue
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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
    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
    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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Andantino
type: MusicRecording
duration: PT0M40S
duration ms: 40040
explicit: false
by artist: Shinichi Suzuki
by artist: Takako Nishizaki
by artist: Terence Dennis
in album: Takako Nishizaki Plays Suzuki Evergreens, Vol. 1
  type: MusicAlbum
  date published: 2010-05-25
isrc code: HKI190923312
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
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957073
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923312
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-07T18:39:05Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63deddbed881cf22190f4d83992d1e6160f0ac721b764a5d232b6ba19ef9e380. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKI190923312.
  date published: 2026-07-07T18:39:05Z
audio: Andantino
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.693
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
    value: 0.992
  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
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Etude
type: MusicRecording
duration: PT1M21S
duration ms: 81320
explicit: false
by artist: Shinichi Suzuki
by artist: Takako Nishizaki
by artist: Terence Dennis
in album: Takako Nishizaki Plays Suzuki Evergreens, Vol. 1
  type: MusicAlbum
  date published: 2010-05-25
isrc code: HKI190923313
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/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923313
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:53:27Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815755fb57da562201ec35401a10f01c7d178c701ac76fecf13bef1b26c78d09. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI190923313.
  date published: 2026-07-08T03:53:27Z
audio: Etude
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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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
    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
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.991
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
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Suite in G Minor, BWV 822: No. 7, Menuet III (Arr. for Violin & Piano)
type: MusicRecording
duration: PT1M15S
duration ms: 75040
explicit: false
by artist: Johann Sebastian Bach
by artist: Takako Nishizaki
by artist: Terence Dennis
in album: Takako Nishizaki Plays Suzuki Evergreens, Vol. 1
  type: MusicAlbum
  date published: 2010-05-25
genre: classical
genre: classical-piano
isrc code: HKI190923314
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/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923314
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d698ef207d63610fdc31be3ac9dbce03b1449b63499e0cdbca69e44d53a6f2. 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/HKI190923314.
  date published: 2026-07-08T03:20:19Z
audio: Suite in G Minor, BWV 822: No. 7, Menuet III (Arr. for Violin & Piano)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
    type: PropertyValue
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.317
  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
    type: PropertyValue
    value: 0.002
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
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Minuet in G Major, BWV Anh. 114 (Attrib. J. S. Bach) [Arr. for Violin & Piano]
type: MusicRecording
duration: PT1M38S
duration ms: 98266
explicit: false
by artist: Johann Sebastian Bach
by artist: Takako Nishizaki
by artist: Terence Dennis
in album: Takako Nishizaki Plays Suzuki Evergreens, Vol. 1
  type: MusicAlbum
  date published: 2010-05-25
genre: classical
genre: classical-piano
isrc code: HKI190923318
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-07T08:06:47+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1690b2a1d4c7eb4b91c1febb25dde2ce470204e2ba39c7cfedd738ab48580be6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957073
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923318
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-07T18:39:05Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1690b2a1d4c7eb4b91c1febb25dde2ce470204e2ba39c7cfedd738ab48580be6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKI190923318.
  date published: 2026-07-07T18:39:05Z
audio: Minuet in G Major, BWV Anh. 114 (Attrib. J. S. Bach) [Arr. for Violin & Piano]
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
    type: PropertyValue
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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
    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
    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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Album für die Jugend, Op. 68: No. 10, Fröhlicher Landmann, von der Arbeit zurückkehrend
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duration: PT0M47S
duration ms: 47933
explicit: false
by artist: Robert Schumann
by artist: Rico Gulda
in album: Takako Nishizaki Plays Suzuki Evergreens, Vol. 1
  type: MusicAlbum
  date published: 2010-05-25
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: HKI190923321
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T08:13:25+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x07cf240acab21f230da8e10c38a54d36f5f36c68547713b679a0c63c72414e6b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190923321
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:53:27Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cf240acab21f230da8e10c38a54d36f5f36c68547713b679a0c63c72414e6b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI190923321.
  date published: 2026-07-08T03:53:27Z
audio: Album für die Jugend, Op. 68: No. 10, Fröhlicher Landmann, von der Arbeit zurückkehrend
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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Mignon: Me voici dans son boudoir (Arr. for Violin & Piano)
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Pièces de viole: No. 24, Rondeau (Attrib. Jean-Baptiste Lully) [Arr. for Violin & Piano]
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Brahms: Four-Hand Piano Music, Vol. 18
type: MusicAlbum
date published: 2013-11-05

Brahms: Four-Hand Piano Music, Vol. 17
type: MusicAlbum
date published: 2006-12-12

Brahms: Four-Hand Piano Music, Vol. 13
type: MusicAlbum
date published: 2005-02-01

Brahms: Four-Hand Piano Music, Vol. 12
type: MusicAlbum
date published: 2004-09-19

KLEBE: Poema drammatico / Widmungen / Zornige Lieder ohne Worte
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date published: 2004-09-01

Brahms: Four-Hand Piano Music, Vol. 11
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date published: 2004-06-30

Brahms: Four-Hand Piano Music, Vol. 10
type: MusicAlbum
date published: 2004-01-05

Brahms: Four-Hand Piano Music, Vol. 9
type: MusicAlbum
date published: 2003-11-01

Brahms: Four-Hand Piano Music, Vol. 8
type: MusicAlbum
date published: 2003-05-14

Brahms: Four Hand Piano Music Vol. 8
type: MusicAlbum
date published: 2003-05-14

Brahms: Four-Hand Piano Music, Vol. 6
type: MusicAlbum
date published: 2000-02-28

Brahms: Four-Hand Piano Music, Vol. 5
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date published: 1999-08-23

Brahms: Four-Hand Piano Music, Vol. 4
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date published: 1999-02-03

Brahms: Four-Hand Piano Music, Vol. 2
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Klebe: Glockenturme / Wiegenlieder / Feuersturz / Sonata, Op. 4
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Brahms: Four-Hand Piano Music, Vol. 1
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track: 16 Waltzes, Op. 39: Waltz 1
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track: 16 Waltzes, Op. 39: Waltz 4
track: 16 Waltzes, Op. 39: Waltz 15
track: 16 Waltzes, Op. 39: Waltz 3
track: Souvenir De La Russe, Anh. IV/6: Die Nachtigall (The Nightingale)

Dvorak: Four-Hand Piano Music, Vol. 2
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Dvořák: Four-Hand Piano Music Vol. 1
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Dvorak: Four-Hand Piano Music, Vol. 1
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date published: 1996-08-22

Brahms: Four-Hand Piano Music, Vol. 16
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date published: 2006-08-29

Brahms: Four-Hand Piano Music, Vol. 15
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date published: 2006-03-21

Brahms: Four Hand Piano Music Vol. 4
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date published: 1999-02-03

Brahms: Four Hand Piano Music Vol. 3
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date published: 1998-07-23

Min første klavermusik
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date published: 2016-06-10

Easy-Listening Piano Classics: Brahms
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date published: 2010-02-23

Naxos November 2013 New Release Sampler
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date published: 2013-07-23

Brahms: Four-Hand Piano Music, Vol. 14
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date published: 2005-05-01

Brahms: Four-Hand Piano Music, Vol. 7
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date published: 2002-05-16
track: Symphony No. 3 in F Major, Op. 90 (version for piano 4 hands): I. Allegro con brio
track: Symphony No. 3 in F Major, Op. 90 (version for piano 4 hands): III. Un poco allegretto
track: Symphony No. 2 in D Major, Op. 73 (version for piano 4 hands): I. Allegro non troppo
track: Symphony No. 3 in F Major, Op. 90 (version for piano 4 hands): IV. Allegro

Brahms: Four-Hand Piano Music, Vol. 3
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date published: 1998-07-23

Four-hand Piano Music, Vol. 11
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date published: 2004-06-30