Ignaz Friedman
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genre: classical piano
description: thumb|240 px|Berlin memorial plaque, Pariser Straße 21, in Berlin-Wilmersdorf, Germany Ignaz Friedman (born Salomon Izaak Freudmann; ; ; February 13, 1882January 26, 1948) was a Polish pianist and com
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album: Remembrances. Piano Essentials from the Golden Age
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album: Homage to Godowsky: Piano Works Dedicated to Leopold Godowsky
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album: Adagio. Heritage Mozart, Schumann & Strauss
album: Ignacy Friedman: Complete Songs
album: Ignaz Friedman - Complete Recordings 1923-1941
album: Classical SoundScapes For Film Vol, 35: Ignace Friedman
album: Classical SoundScapes For Film Vol, 31: Ignace Friedman
album: Piano SoundScapes Vol, 31: Ignace Friedman
album: Piano Soundscapes, Vol. 35
album: Piano Soundscapes, Vol. 31
album: Friedman & Różycki: Piano Quintets
album: Friedman: Piano Transcriptions
album: Friedman: Original Piano Compositions
album: Ignaz Friedman Performs Original Piano Works
album: Frédéric Chopin: 12 Mazurkas, Berceuse, Preludes, Etudes, Valse, Polonaise and Ballade
album: The Great Polish Chopin Tradition: Ignacy Friedman
album: Ignaz Friedman, piano recital
album: The Piano Masters: Ignaz Friedman / Benno Moiseiwitsch / Simon Barere / Mischa Levitzki / Alexander Brailowsky / Adrian Aeschbacher (1924-1947)
album: Friedman: Piano Works
album: Friedman, Ignaz: Complete Recordings, Vol. 5: English Columbia Recordings (1933-1936)
album: Rare Piano Encores
album: Mendelssohn: Songs Without Words (Friedman) (1930-1931)
album: Chopin: Mazurkas (Friedman) (1928-1930)
album: Grieg: Piano Concerto / Chopin: Sonata in B-Flat Minor (Friedman) (1927-1928)
album: Beethoven: 'Moonlight' Sonata / Chopin: Mazurkas (Friedman) (1923-1926)
album: Liszt & Chopin: Works for Piano
album: The Polish Virtuoso
album: Bach, Schubert & Others: Violin Works
album: Notturni
album: Ignaz Friedmann Plays Chopin
album: Beethoven: Violin Sonata No.9, Op.47

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Adagio. Heritage Mozart, Schumann & Strauss
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date published: 2024-03-20

Ignacy Friedman: Complete Songs
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date published: 2023-04-21

Ignaz Friedman - Complete Recordings 1923-1941
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date published: 2020-02-04

Classical SoundScapes For Film Vol, 35: Ignace Friedman
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date published: 2019-11-02

Classical SoundScapes For Film Vol, 31: Ignace Friedman
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date published: 2019-11-02

Piano SoundScapes Vol, 31: Ignace Friedman
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date published: 2019-10-21

Piano Soundscapes, Vol. 35
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date published: 2017-04-05

Piano Soundscapes, Vol. 31
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date published: 2017-04-04

Friedman & Różycki: Piano Quintets
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date published: 2016-09-02
track: Piano Quintet in C Minor, Op. 35: I. Lento – Allegro moderato
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Friedman: Piano Transcriptions
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track: Suite in E Minor, RCT 2: Pièces de clavecin: Suite in E Minor: V. Le rappel des oiseaux (arr. I. Friedman for piano)
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track: Nocturne No. 5 in B-Flat Major, H. 37 (arr. I. Friedman for piano)
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Les Indes galantes: Musette (arr. I. Friedman for piano)
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Orfeo ed Euridice, Act II: Dance of the Blessed Spirits, "Mélodie" (arr. I. Friedman for piano)
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Nocturne No. 5 in B-Flat Major, H. 37 (arr. I. Friedman for piano)
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6 Pieces for Organ: No. 3. Prelude, fugue et variation in B Minor, Op. 18, M. 30 (arr. I. Friedman for piano)
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Nina "La folle par amour": Nina, ou La folle par amour: Romance (arr. I. Friedman for piano)
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Pièces de clavecin, Book 2, Suite No. 5: Le Caquet (arr. I. Friedman for piano)
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Pièces de Clavecin, Book 1, Suite No. 4: Les Fifres (arr. I. Friedman for piano)
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additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfeff049d8a5e4f223324938cdfbceac729ff594e1061b2603c2e3be08742781b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956302
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956302
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191516009
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:30:09Z
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 0xfeff049d8a5e4f223324938cdfbceac729ff594e1061b2603c2e3be08742781b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI191516009.
  date published: 2026-07-02T03:30:09Z
audio: Pièces de Clavecin, Book 1, Suite No. 4: Les Fifres (arr. I. Friedman for piano)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 101.081
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.409
  additional property: Energy
    type: PropertyValue
    value: 0.197
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.982
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.907
  additional property: Liveness
    type: PropertyValue
    value: 0.098
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.597
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.746
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Keyboard Sonata in G Major, K.523/L.490/P.527 (arr. I. Friedman for piano)
type: MusicRecording
duration: PT2M53S
duration ms: 173466
explicit: false
by artist: Ignaz Friedman
by artist: Domenico Scarlatti
by artist: Joseph Banowetz
in album: Friedman: Piano Transcriptions
  type: MusicAlbum
  date published: 2016-08-12
genre: historic-piano-performance
isrc code: HKI191516010
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-10T02:07:41+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xedaa83fbdfb6bacff5c9b806779d66d1495503ddf6e2b041e9c1fd4b0999ce03
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953520
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953520
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191516010
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T13:32:09Z
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 0xedaa83fbdfb6bacff5c9b806779d66d1495503ddf6e2b041e9c1fd4b0999ce03. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI191516010.
  date published: 2026-06-13T13:32:09Z
audio: Keyboard Sonata in G Major, K.523/L.490/P.527 (arr. I. Friedman for piano)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 189.008
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.426
  additional property: Energy
    type: PropertyValue
    value: 0.16
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.994
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.874
  additional property: Liveness
    type: PropertyValue
    value: 0.125
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.788
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.25
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Keyboard Sonata in F Major, K.446/L.433/P.177 (arr. I. Friedman for piano)
type: MusicRecording
duration: PT5M43S
duration ms: 343826
explicit: false
by artist: Ignaz Friedman
by artist: Domenico Scarlatti
by artist: Joseph Banowetz
in album: Friedman: Piano Transcriptions
  type: MusicAlbum
  date published: 2016-08-12
genre: historic-piano-performance
isrc code: HKI191516011
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-20T03:48:02+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9e691dfb24d4a294a185df7115f1625079d8e78eb10cfb0d0c3e146eda4d26eb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956302
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956302
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191516011
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:30:09Z
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 0x9e691dfb24d4a294a185df7115f1625079d8e78eb10cfb0d0c3e146eda4d26eb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI191516011.
  date published: 2026-07-02T03:30:09Z
audio: Keyboard Sonata in F Major, K.446/L.433/P.177 (arr. I. Friedman for piano)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 98.668
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.351
  additional property: Energy
    type: PropertyValue
    value: 0.014
  additional property: Speechiness
    type: PropertyValue
    value: 0.049
  additional property: Acousticness
    type: PropertyValue
    value: 0.994
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.926
  additional property: Liveness
    type: PropertyValue
    value: 0.106
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.12
  additional property: Loudness (dB)
    type: PropertyValue
    value: -33.278
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Don Juan: Gavotte (arr. I. Friedman for piano)
type: MusicRecording
duration: PT4M16S
duration ms: 256706
explicit: false
by artist: Ignaz Friedman
by artist: Christoph Willibald Gluck
by artist: Joseph Banowetz
in album: Friedman: Piano Transcriptions
  type: MusicAlbum
  date published: 2016-08-12
genre: historic-piano-performance
isrc code: HKI191516012
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-05T05:11:50+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd76967724b1a0cc443e3e19be6c7b378b8cc10e1cfe814597e7b3dfeae0df591
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953513
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191516012
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:47:07Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76967724b1a0cc443e3e19be6c7b378b8cc10e1cfe814597e7b3dfeae0df591. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191516012.
  date published: 2026-06-13T12:47:07Z
audio: Don Juan: Gavotte (arr. I. Friedman for piano)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 102.316
  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: 0.315
  additional property: Energy
    type: PropertyValue
    value: 0.017
  additional property: Speechiness
    type: PropertyValue
    value: 0.055
  additional property: Acousticness
    type: PropertyValue
    value: 0.995
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.945
  additional property: Liveness
    type: PropertyValue
    value: 0.169
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.175
  additional property: Loudness (dB)
    type: PropertyValue
    value: -32.682
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Pièces de clavecin, Book 1, 5th Ordre: Pieces de clavecin, Book 1: 5th Ordre in A Major-minor: La Tendre Fanchon (arr. I. Friedman for piano)
type: MusicRecording
duration: PT3M52S
duration ms: 232680
explicit: false
by artist: Ignaz Friedman
by artist: François Couperin
by artist: Joseph Banowetz
in album: Friedman: Piano Transcriptions
  type: MusicAlbum
  date published: 2016-08-12
genre: historic-piano-performance
isrc code: HKI191516013
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-07T18:40:51+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x48d5f26865556fe3adc81547250bb87d28c20888bf286ed7c29c63c23fd67ed5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953515
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953515
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191516013
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:53:06Z
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 0x48d5f26865556fe3adc81547250bb87d28c20888bf286ed7c29c63c23fd67ed5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKI191516013.
  date published: 2026-06-13T12:53:06Z
audio: Pièces de clavecin, Book 1, 5th Ordre: Pieces de clavecin, Book 1: 5th Ordre in A Major-minor: La Tendre Fanchon (arr. I. Friedman for piano)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 106.847
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.231
  additional property: Energy
    type: PropertyValue
    value: 0.033
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.995
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.923
  additional property: Liveness
    type: PropertyValue
    value: 0.069
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.16
  additional property: Loudness (dB)
    type: PropertyValue
    value: -31.434
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Harpsichord Sonata in G Major, Op. 1 No. 11: Adagio (arr. I. Friedman for piano)
type: MusicRecording
duration: PT11M7S
duration ms: 667866
explicit: false
by artist: Ignaz Friedman
by artist: Giovanni Battista Grazioli
by artist: Joseph Banowetz
in album: Friedman: Piano Transcriptions
  type: MusicAlbum
  date published: 2016-08-12
genre: historic-piano-performance
isrc code: HKI191516014
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-21T17:56:21+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6b6b002d5c5c6da20b30dd03dadc2adaf10c634434f07d9f871f8919dc13e423
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956302
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956302
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191516014
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:30:09Z
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 0x6b6b002d5c5c6da20b30dd03dadc2adaf10c634434f07d9f871f8919dc13e423. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI191516014.
  date published: 2026-07-02T03:30:09Z
audio: Harpsichord Sonata in G Major, Op. 1 No. 11: Adagio (arr. I. Friedman for piano)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 121.178
  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: 0.356
  additional property: Energy
    type: PropertyValue
    value: 0.003
  additional property: Speechiness
    type: PropertyValue
    value: 0.049
  additional property: Acousticness
    type: PropertyValue
    value: 0.994
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.922
  additional property: Liveness
    type: PropertyValue
    value: 0.112
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.165
  additional property: Loudness (dB)
    type: PropertyValue
    value: -38.114
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Orfeo ed Euridice: Ballet des Ombres Heureuses (arr. I. Friedman for piano)
type: MusicRecording
duration: PT3M58S
duration ms: 238893
explicit: false
by artist: Ignaz Friedman
by artist: Christoph Willibald Gluck
by artist: Joseph Banowetz
in album: Friedman: Piano Transcriptions
  type: MusicAlbum
  date published: 2016-08-12
genre: historic-piano-performance
isrc code: HKI191516015
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-04T10:15:51+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2a89eb0cd9033c5afb542d3ac0fbd3c757637577ff6ffe014bf08fdd23590a5c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953513
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191516015
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:47:07Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a89eb0cd9033c5afb542d3ac0fbd3c757637577ff6ffe014bf08fdd23590a5c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191516015.
  date published: 2026-06-13T12:47:07Z
audio: Orfeo ed Euridice: Ballet des Ombres Heureuses (arr. I. Friedman for piano)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 70.106
  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.293
  additional property: Energy
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track: Strophes, Op. 71: No. 4, Andante mesto
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4 Klavierstücke, Op. 27: No. 4, Im Volkson
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Ignaz Friedman Performs Original Piano Works
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Frédéric Chopin: 12 Mazurkas, Berceuse, Preludes, Etudes, Valse, Polonaise and Ballade
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The Great Polish Chopin Tradition: Ignacy Friedman
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Ignaz Friedman, piano recital
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The Piano Masters: Ignaz Friedman / Benno Moiseiwitsch / Simon Barere / Mischa Levitzki / Alexander Brailowsky / Adrian Aeschbacher (1924-1947)
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Friedman: Piano Works
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Friedman, Ignaz: Complete Recordings, Vol. 5: English Columbia Recordings (1933-1936)
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Rare Piano Encores
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Mendelssohn: Songs Without Words (Friedman) (1930-1931)
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Chopin: Mazurkas (Friedman) (1928-1930)
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Grieg: Piano Concerto / Chopin: Sonata in B-Flat Minor (Friedman) (1927-1928)
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Beethoven: 'Moonlight' Sonata / Chopin: Mazurkas (Friedman) (1923-1926)
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Liszt & Chopin: Works for Piano
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The Polish Virtuoso
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Bach, Schubert & Others: Violin Works
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Notturni
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Ignaz Friedmann Plays Chopin
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Beethoven: Violin Sonata No.9, Op.47
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