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Violin Sonata No. 7 in C Minor, Op. 30, No. 2: II. Adagio cantabile
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Piano Concerto No. 22 in E-Flat Major, K. 482: III. Allegro
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Piano Concerto No. 2 in F Minor, Op. 21: II. Larghetto
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Piano Concerto No. 1 in E Minor, Op. 11: I. Allegro maestoso
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Piano Concerto No. 1 in E Minor, Op. 11: II. Romance. Larghetto
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Waltzes, Op. 64: No. 2 in C-Sharp Minor. Tempo giusto
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Beethoven: Violin Sonatas Nos. 1, 2, 3 & 5
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OpenTimestamps Proof of Existence
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Mozart: Piano Concertos Nos. 20 & 23
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Chopin: 24 Préludes, Op. 28 - Andante Spianato & Grande Polonaise Brillante, Op. 22
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track: 24 Préludes, Op. 28, No. 14 in E-Flat Minor - Allegro
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24 Préludes, Op. 28, No. 6 in B Minor - Lento assai
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24 Préludes, Op. 28, No. 11 in B Major - Vivace
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subject of: OpenTimestamps Proof of Existence
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24 Préludes, Op. 28, No. 14 in E-Flat Minor - Allegro
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24 Préludes, Op. 28, No. 17 in A-Flat Major - Allegretto
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24 Préludes, Op. 28, No. 19 in E-Flat Major - Vivace
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24 Préludes, Op. 28, No. 20 in C Minor - Largo
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24 Préludes, Op. 28, No. 21 in B-Flat Major - Cantabile
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subject of: OpenTimestamps Proof of Existence
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Mozart: Piano Concertos Nos. 22 & 24
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date published: 2020-01-31
track: Piano Concerto No. 22 in E-Flat Major, K. 482: III. Allegro
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  subject of: OpenTimestamps Proof of Existence
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Chopin: Ballades & Impromptus
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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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track: Impromptu No. 3 in G-flat Major, Op. 51
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    date published: 2026-07-08T08:56:20Z
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track: Fantaisie-Impromptu in C-sharp Minor, Op. posth. 66
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date published: 2026-07-08T03:20:19Z

Fantaisie-Impromptu in C-sharp Minor, Op. posth. 66
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Chopin: Concertos Nos. 1 & 2
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track: Waltzes, Op. 34: No. 2 in A Minor. Lento
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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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e2d29023483f90bf8b24ec507fd1f11587abf0f17ba43ccdd815432e95e7c2. 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/CALC42514907.
date published: 2026-07-08T03:20:19Z

Valses Poéticos, Op. 43: VI. Quasi ad libitum (Sentimental)
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 97.168
additional property: Musical Key
  type: PropertyValue
  value: 6
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.431
additional property: Energy
  type: PropertyValue
  value: 0.014
additional property: Speechiness
  type: PropertyValue
  value: 0.059
additional property: Acousticness
  type: PropertyValue
  value: 0.995
additional property: Instrumentalness
  type: PropertyValue
  value: 0.952
additional property: Liveness
  type: PropertyValue
  value: 0.107
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.164
additional property: Loudness (dB)
  type: PropertyValue
  value: -32.692
additional property: Key Name
  type: PropertyValue
  value: F#
additional property: Mode Name
  type: PropertyValue
  value: Minor

Valses Poéticos, Op. 43: VIII. Presto
type: MusicRecording
duration: PT2M22S
duration ms: 142200
explicit: false
by artist: Enrique Granados
by artist: Charles Richard-Hamelin
in album: Échos: Chopin, Granados & Albéniz
  type: MusicAlbum
  date published: 2025-02-14
isrc code: CALC42514909
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T22:21:05+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3a3e338bd2f51a7f97e81e4e3637c6e4020c203ff7049a128d36b1bc9c5741fb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42514909
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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3e338bd2f51a7f97e81e4e3637c6e4020c203ff7049a128d36b1bc9c5741fb. 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/CALC42514909.
  date published: 2026-07-08T03:20:19Z
audio: Valses Poéticos, Op. 43: VIII. Presto
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 184.91
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.25
  additional property: Energy
    type: PropertyValue
    value: 0.088
  additional property: Speechiness
    type: PropertyValue
    value: 0.052
  additional property: Acousticness
    type: PropertyValue
    value: 0.987
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.904
  additional property: Liveness
    type: PropertyValue
    value: 0.102
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.193
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.064
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Waltzes, Op. 34: No. 2 in A Minor. Lento
type: MusicRecording
duration: PT5M50S
duration ms: 350466
explicit: false
by artist: Frédéric Chopin
by artist: Charles Richard-Hamelin
in album: Échos: Chopin, Granados & Albéniz
  type: MusicAlbum
  date published: 2025-02-14
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: CALC42514914
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T04:29:41+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5a3ead029a3b5b3512726d919c72498864aac79183b0d77763f283f9e53ae2c7
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/CALC42514914
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 0x5a3ead029a3b5b3512726d919c72498864aac79183b0d77763f283f9e53ae2c7. 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/CALC42514914.
  date published: 2026-07-08T03:22:41Z
audio: Waltzes, Op. 34: No. 2 in A Minor. Lento
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 97.464
  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: 0.258
  additional property: Energy
    type: PropertyValue
    value: 0.021
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.995
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.912
  additional property: Liveness
    type: PropertyValue
    value: 0.081
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.074
  additional property: Loudness (dB)
    type: PropertyValue
    value: -32.454
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Waltzes, Op. 70: No. 2 in F Minor. Tempo giusto
type: MusicRecording
duration: PT3M21S
duration ms: 201200
explicit: false
by artist: Frédéric Chopin
by artist: Charles Richard-Hamelin
in album: Échos: Chopin, Granados & Albéniz
  type: MusicAlbum
  date published: 2025-02-14
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: CALC42514916
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T08:44:29+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6c080d6cd1ca83196261c74192bd4d7b79b7dbc6b5f5bb54eed0595bf5c51380
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957145
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957145
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42514916
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T08:56:20Z
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 0x6c080d6cd1ca83196261c74192bd4d7b79b7dbc6b5f5bb54eed0595bf5c51380. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42514916.
  date published: 2026-07-08T08:56:20Z
audio: Waltzes, Op. 70: No. 2 in F Minor. Tempo giusto
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 100.679
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.319
  additional property: Energy
    type: PropertyValue
    value: 0.032
  additional property: Speechiness
    type: PropertyValue
    value: 0.046
  additional property: Acousticness
    type: PropertyValue
    value: 0.995
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.917
  additional property: Liveness
    type: PropertyValue
    value: 0.083
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.148
  additional property: Loudness (dB)
    type: PropertyValue
    value: -32.357
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major

Granados: Valses Poéticos, Op. 43: I. Melodioso
type: MusicAlbum
date published: 2025-01-17

Trio Hochelaga : Beach, Catoire, Brahms
type: MusicAlbum
date published: 2015-09-25