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genre: classical piano
description: Reine Gianoli (13 March 1915 – 21 February 1979) was a French classical pianist. Biography Born in Paris, Gianoli studied with Lazare Lévy, Alfred Cortot, Yves Nat and Edwin Fischer. Throughout he
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album: Schumann: Solo Piano Works - Volume 4
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album: Schumann: Solo Piano Works - Volume 3
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album: Schumann: Solo Piano Works - Volume 1
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album: Mozart: Piano Concerto No. 10, K. 365, Thierry de Brunhoff vs. José Iturbi (Compare 2 Versions)
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album: Reine Gianoli, Vol. 1: Complete Mozart Piano Sonatas
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album: Concertos Pour Piano 1 Et 2
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album: Chopin : Concertos - Valses - Reine Gianoli
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album: Lovely Classique Romantique
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album: You Have Heard This Before: Classical Music in Movies and OST
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album: 'Chromatique' - Chopin Solo Piano Works
album: A Classical Country: Chopin
album: A Classical December: Chopin
album: Robert Schumann - The Essential Edition
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album: Best of Chopin
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album: Mon premier récital de piano
album: Chopin: Introduction
album: Classical Melancholia
album: Robert Schumann: Piano Works
album: Women at the Piano - An Anthology of Historic Performances, Vol. 4 (1921-1955)

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Ballade No. 1 in G Minor, Op. 23 - Pt. 3
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Ballade No. 1 in G Minor, Op. 23 - Pt. 6
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Ballade No. 1 in G Minor, Op. 23 - Pt. 8
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Impromptu No. 1 in A-Flat, Op. 29 - Pt. 1
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  date published: 2026-07-08T03:53:27Z
audio: Impromptu No. 1 in A-Flat, Op. 29 - Pt. 1
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Impromptu No. 1 in A-Flat, Op. 29 - Pt. 2
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by artist: Mikhail Pletnev
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T15:41:10Z
audio: Impromptu No. 1 in A-Flat, Op. 29 - Pt. 2
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Impromptu No. 1 in A-Flat, Op. 29 - Pt. 4
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by artist: Frédéric Chopin
by artist: Mikhail Pletnev
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genre: classical
genre: early-romantic-era
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: Impromptu No. 1 in A-Flat, Op. 29 - Pt. 4
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Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 1
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by artist: Tamás Vásáry
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genre: early-romantic-era
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T14:50:41Z
audio: Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 1
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Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 2
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by artist: Tamás Vásáry
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genre: classical
genre: early-romantic-era
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 2
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Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 3
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by artist: Tamás Vásáry
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genre: classical
genre: early-romantic-era
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 3
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Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 4
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by artist: Tamás Vásáry
in album: "A Bright Sunday" with Chopin
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  date published: 2024-12-08
genre: classical
genre: early-romantic-era
genre: polish-classical
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 4
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Nocturne No. 1 in B-Flat Minor, Op. 9 No. 1 - Pt. 1
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by artist: Tamás Vásáry
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genre: classical
genre: early-romantic-era
genre: polish-classical
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659be700723f00acb1ed2aebad550ae2c4d6788c6d7de4cf13f6c346767ad312. 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/DEF056507171.
  date published: 2026-07-08T03:53:27Z
audio: Nocturne No. 1 in B-Flat Minor, Op. 9 No. 1 - Pt. 1
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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Nocturne No. 1 in B-Flat Minor, Op. 9 No. 1 - Pt. 2
type: MusicRecording
duration: PT0M44S
duration ms: 44293
explicit: false
by artist: Frédéric Chopin
by artist: Tamás Vásáry
in album: "A Bright Sunday" with Chopin
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  date published: 2024-12-08
genre: classical
genre: early-romantic-era
genre: polish-classical
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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
  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/DEF056507172
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 0x12e4c11c66016722c3a03053601cfb8999a47d17deb641cef750c24347c0dcc5. 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/DEF056507172.
  date published: 2026-07-08T03:20:19Z
audio: Nocturne No. 1 in B-Flat Minor, Op. 9 No. 1 - Pt. 2
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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Nocturne No. 1 in B-Flat Minor, Op. 9 No. 1 - Pt. 4
type: MusicRecording
duration: PT0M40S
duration ms: 40213
explicit: false
by artist: Frédéric Chopin
by artist: Tamás Vásáry
in album: "A Bright Sunday" with Chopin
  type: MusicAlbum
  date published: 2024-12-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF056507174
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056507174
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7007aca47cc0cf6cbb6d1e576cd43c5873cacbcf5fc52bb376c6319cfc4dba2. 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/DEF056507174.
  date published: 2026-07-08T03:22:41Z
audio: Nocturne No. 1 in B-Flat Minor, Op. 9 No. 1 - Pt. 4
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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Nocturne No. 1 in B-Flat Minor, Op. 9 No. 1 - Pt. 5
type: MusicRecording
duration: PT0M32S
duration ms: 32680
explicit: false
by artist: Frédéric Chopin
by artist: Tamás Vásáry
in album: "A Bright Sunday" with Chopin
  type: MusicAlbum
  date published: 2024-12-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF056507175
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056507175
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b9e49d9402b63beec9706211a92bfbabcd9c607f3c24c3de552242d538308c. 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/DEF056507175.
  date published: 2026-07-08T03:22:41Z
audio: Nocturne No. 1 in B-Flat Minor, Op. 9 No. 1 - Pt. 5
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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
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Nocturne No. 1 in B-Flat Minor, Op. 9 No. 1 - Pt. 6
type: MusicRecording
duration: PT0M39S
duration ms: 39546
explicit: false
by artist: Frédéric Chopin
by artist: Tamás Vásáry
in album: "A Bright Sunday" with Chopin
  type: MusicAlbum
  date published: 2024-12-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF056507176
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056507176
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22edf3e35c4362eba31a4c8a6b05dc5fbaa26dcd250e6739196280989303ef66. 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/DEF056507176.
  date published: 2026-06-13T13:32:09Z
audio: Nocturne No. 1 in B-Flat Minor, Op. 9 No. 1 - Pt. 6
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre - Pt. 1
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duration: PT1M0S
duration ms: 60613
explicit: false
by artist: Frédéric Chopin
by artist: Martha Argerich
in album: "A Bright Sunday" with Chopin
  type: MusicAlbum
  date published: 2024-12-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF057409701
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
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2961b7ac3000bad1416f495bfe77102bebf10ec722cc177e05069e6a54832f67. 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/DEF057409701.
  date published: 2026-07-08T03:20:19Z
audio: Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre - Pt. 1
  type: AudioObject
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  additional property: Mode (Major/Minor)
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  additional property: Acousticness
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Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre - Pt. 3
type: MusicRecording
duration: PT0M38S
duration ms: 38320
explicit: false
by artist: Frédéric Chopin
by artist: Martha Argerich
in album: "A Bright Sunday" with Chopin
  type: MusicAlbum
  date published: 2024-12-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF057409703
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
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  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 0x18dfd801e0c469c8db984044d3c20ea0852c1a0b82fd847353b95d3a88fec478. 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/DEF057409703.
  date published: 2026-06-13T13:32:09Z
audio: Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre - Pt. 3
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Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre - Pt. 7
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duration: PT0M59S
duration ms: 59720
explicit: false
by artist: Frédéric Chopin
by artist: Martha Argerich
in album: "A Bright Sunday" with Chopin
  type: MusicAlbum
  date published: 2024-12-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF057409707
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: OTSVerificationAPI
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subject of: OpenTimestamps Proof of Existence
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Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre - Pt. 8
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subject of: OpenTimestamps Proof of Existence
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Cantabile in B-Flat Major, KK IVb/6
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subject of: OpenTimestamps Proof of Existence
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2 Bourrees, B160b: No. 1 In G Minor
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subject of: OpenTimestamps Proof of Existence
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audio: 2 Bourrees, B160b: No. 1 In G Minor
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'Chromatique' - Chopin Solo Piano Works
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    date published: 2026-07-08T03:22:41Z
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track: 3 Waltzes, Op. 64: Waltz No. 6 In D Flat, Op. 64 No. 1 "Minute" - Edit
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OpenTimestamps Proof of Existence
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date published: 2026-07-08T03:53:27Z

Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 2
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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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Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 3
type: MusicRecording
duration: PT0M44S
duration ms: 44946
explicit: false
by artist: Frédéric Chopin
by artist: Tamás Vásáry
in album: 'Chromatique' - Chopin Solo Piano Works
  type: MusicAlbum
  date published: 2025-01-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF056502063
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056502063
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 0xce102f561d4a7ba48184abc5bbac9e8599eb05981abbe941f0fe16e09d7a8d2f. 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/DEF056502063.
  date published: 2026-07-08T03:53:27Z
audio: Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 3
  type: AudioObject
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 4
type: MusicRecording
duration: PT0M40S
duration ms: 40333
explicit: false
by artist: Frédéric Chopin
by artist: Tamás Vásáry
in album: 'Chromatique' - Chopin Solo Piano Works
  type: MusicAlbum
  date published: 2025-01-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF056502064
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056502064
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30299724653b8001869afb0c8988926a5b2a2e9493cf9a0f207ce66afb3aafaf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056502064.
  date published: 2026-07-02T03:55:08Z
audio: Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 4
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  additional property: Danceability
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  additional property: Energy
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  additional property: Valence (Positivity)
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Ballade No. 1 in G Minor, Op. 23 - Pt. 1
type: MusicRecording
duration: PT0M38S
duration ms: 38906
explicit: false
by artist: Frédéric Chopin
by artist: Tamás Vásáry
in album: 'Chromatique' - Chopin Solo Piano Works
  type: MusicAlbum
  date published: 2025-01-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF056507161
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
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056507161
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 0xb190b74aaf7cd65c0ddc1dccbc1ef282e10301a40ee5dd810b8ed83eff55a5e8. 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/DEF056507161.
  date published: 2026-07-08T03:53:27Z
audio: Ballade No. 1 in G Minor, Op. 23 - Pt. 1
  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
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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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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Ballade No. 1 in G Minor, Op. 23 - Pt. 3
type: MusicRecording
duration: PT0M50S
duration ms: 50946
explicit: false
by artist: Frédéric Chopin
by artist: Tamás Vásáry
in album: 'Chromatique' - Chopin Solo Piano Works
  type: MusicAlbum
  date published: 2025-01-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF056507163
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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  value: 2026-07-03T02:02:37+00:00
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/957120
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056507163
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6713c4dfc1793fc0d7eb38d53ed034e97a8e8db1e286b7fe0c4cebc1fca7afa. 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/DEF056507163.
  date published: 2026-07-08T03:22:41Z
audio: Ballade No. 1 in G Minor, Op. 23 - Pt. 3
  type: AudioObject
  additional property: Tempo (BPM)
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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
    value: 5
  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Ballade No. 1 in G Minor, Op. 23 - Pt. 6
type: MusicRecording
duration: PT0M37S
duration ms: 37280
explicit: false
by artist: Frédéric Chopin
by artist: Tamás Vásáry
in album: 'Chromatique' - Chopin Solo Piano Works
  type: MusicAlbum
  date published: 2025-01-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF056507166
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T06:53:53+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcd27200467f88ef70a80f485c58da9f89031c7b840d6a68e40fe259dd78c3210
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/DEF056507166
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 0xcd27200467f88ef70a80f485c58da9f89031c7b840d6a68e40fe259dd78c3210. 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/DEF056507166.
  date published: 2026-07-08T03:20:19Z
audio: Ballade No. 1 in G Minor, Op. 23 - Pt. 6
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.344
  additional property: Energy
    type: PropertyValue
    value: 0.293
  additional property: Speechiness
    type: PropertyValue
    value: 0.034
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
    value: 0.273
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.587
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 1
type: MusicRecording
duration: PT0M36S
duration ms: 36000
explicit: false
by artist: Frédéric Chopin
by artist: Arturo Benedetti Michelangeli
in album: 'Chromatique' - Chopin Solo Piano Works
  type: MusicAlbum
  date published: 2025-01-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF057104411
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T13:41:41+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf2dd9ae74dd9ffd35c3fdc669ae016a98335f17d8d8e7b48ff51c2fc45230885
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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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/DEF057104411
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 0xf2dd9ae74dd9ffd35c3fdc669ae016a98335f17d8d8e7b48ff51c2fc45230885. 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/DEF057104411.
  date published: 2026-07-08T08:56:20Z
audio: Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 1
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 116.743
  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  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
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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)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 8
type: MusicRecording
duration: PT0M41S
duration ms: 41813
explicit: false
by artist: Frédéric Chopin
by artist: Arturo Benedetti Michelangeli
in album: 'Chromatique' - Chopin Solo Piano Works
  type: MusicAlbum
  date published: 2025-01-08
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: DEF057104418
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T13:13:19+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd09ef25c1e6382ef2806fe9272ff29aebe9a54a5e78196c47a1b3e9712d6b21e
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057104418
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09ef25c1e6382ef2806fe9272ff29aebe9a54a5e78196c47a1b3e9712d6b21e. 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/DEF057104418.
  date published: 2026-07-08T03:20:19Z
audio: Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 8
  type: AudioObject
  additional property: Tempo (BPM)
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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
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Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 9
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Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 11
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Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 13
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2 Bourrees, B160b: No. 1 In G Minor
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3 Waltzes, Op. 64: Waltz No. 6 In D Flat, Op. 64 No. 1 "Minute" - Edit
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24 Préludes, Op. 28 - Arr. Hirschfelder: Prélude No. 15 in D flat, Op. 28, No. 15 - "Raindrop"
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A Classical Country: Chopin
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12 Études, Op. 10: No. 1 in C Major
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Variations sur un air national allemand, B.14: 1. Introduction. A capriccio
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Variations sur un air national allemand, B.14: 2. Theme. Andantino
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Waltz No. 17 in E Flat Major, Op. Posth. B.46
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Robert Schumann - The Essential Edition
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Le Petit Ménestrel: Schumann Raconté Aux Enfants
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OpenTimestamps Proof of Existence
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Waltz No. 7 In C Sharp Minor, Op. 64 No. 2
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duration: PT3M7S
duration ms: 187802
explicit: false
by artist: Frédéric Chopin
by artist: Bruno Rigutto
in album: Best of Chopin
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  date published: 2020-06-09
genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRUM71302243
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd03e4d49b7459f75cabb5558433f9c8cbb1df98d00151090a9fb8e0ee7f3fc. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM71302243.
  date published: 2026-07-07T15:21:38Z
audio: Waltz No. 7 In C Sharp Minor, Op. 64 No. 2
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24 Préludes, Op. 28: No. 15 in D-Flat Major, Sostenuto
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duration: PT5M35S
duration ms: 335399
explicit: false
by artist: Frédéric Chopin
by artist: Milosz Magin
in album: Best of Chopin
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genre: classical
genre: early-romantic-era
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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
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: 24 Préludes, Op. 28: No. 15 in D-Flat Major, Sostenuto
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12 Études, Op. 10: No. 12 in C Minor "Revolutionary"
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duration: PT2M31S
duration ms: 151543
explicit: false
by artist: Frédéric Chopin
by artist: Yvonne Loriod
in album: Best of Chopin
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genre: classical
genre: early-romantic-era
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additional property: CopyrightRegisteredAt
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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
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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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498d9599e8fd7b9bd3be2657bc8d15e6f76b44fcc5eeddece06e151efad0beaa. 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/FRUM71800607.
  date published: 2026-07-08T03:22:41Z
audio: 12 Études, Op. 10: No. 12 in C Minor "Revolutionary"
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Impromptu No. 1 in A-Flat Major, Op. 29
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duration: PT4M8S
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explicit: false
by artist: Frédéric Chopin
by artist: Milosz Magin
in album: Best of Chopin
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  date published: 2020-06-09
genre: classical
genre: early-romantic-era
genre: polish-classical
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Impromptu No. 1 in A-Flat Major, Op. 29
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  additional property: Danceability
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12 Études, Op. 10: No. 1 in C Major
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duration: PT2M0S
duration ms: 120093
explicit: false
by artist: Frédéric Chopin
by artist: Milosz Magin
in album: Best of Chopin
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  date published: 2020-06-09
genre: classical
genre: early-romantic-era
genre: polish-classical
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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
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: 12 Études, Op. 10: No. 1 in C Major
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4 Ballades: Ballade No. 2 in F Major, Op. 38
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duration: PT6M57S
duration ms: 417356
explicit: false
by artist: Frédéric Chopin
by artist: Milosz Magin
in album: Best of Chopin
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genre: classical
genre: early-romantic-era
genre: polish-classical
isrc code: FRZ077201040
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: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: 4 Ballades: Ballade No. 2 in F Major, Op. 38
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Nocturne No. 19 in E Minor, Op. Posth. 72 No. 1
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by artist: Milosz Magin
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genre: classical
genre: early-romantic-era
genre: polish-classical
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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: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Nocturne No. 19 in E Minor, Op. Posth. 72 No. 1
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
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Musique classique pour les enfants
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  subject of: OpenTimestamps Proof of Existence
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track: Cassation in G for Orchestra and Toys: 2. Menuetto
track: Cassation in G for Orchestra and Toys: 3. Allegro

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OpenTimestamps Proof of Existence
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date published: 2026-07-08T03:22:41Z

Cassation in G for Orchestra and Toys: 1. Marche
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Chopin Piano
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