Nelson Freire
type: MusicGroup
genre: classical
genre: classical piano
description: Nelson José Pinto Freire (; 18 October 19441 November 2021) was a Brazilian classical pianist. Regarded as one of the greatest pianists of his generation, he was noted for his "decorous piano playing"
popularity: 44
followers: 26305
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additional property: OTSVerifyInstructions
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  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 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. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-12T19:24:56Z
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album: Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
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  date published: 1994-01-01
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    by artist: Béla Bartók
    by artist: Martha Argerich
    by artist: Nelson Freire
    by artist: Peter Sadlo
    by artist: Edgar Guggeis
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      date published: 1994-01-01
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-29T21:09:47Z
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  track: Sonata For 2 Pianos And Percussion, Sz. 110: 2. Lento, ma non troppo
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    by artist: Béla Bartók
    by artist: Martha Argerich
    by artist: Nelson Freire
    by artist: Peter Sadlo
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      type: MusicAlbum
      date published: 1994-01-01
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    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T03:20:19Z
    audio: Sonata For 2 Pianos And Percussion, Sz. 110: 2. Lento, ma non troppo
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  track: Sonata For 2 Pianos And Percussion, Sz. 110: 3. Allegro non troppo
  track: Ma mère l'oye, M.60: 1. Pavane de la Belle au bois dormant: Lent
  track: Ma mère l'oye, M.60: 2. Petit Poucet: Très modéré
  track: Ma mère l'oye, M.60: 3. Laideronnette, Impératrice des pagodes: Mouvement de Marche
  track: Ma mère l'oye, M.60: 4. Les Entretiens de la Belle et de la Bête: Mouvement de Valse très modéré
  track: Ma mère l'oye, M.60: 5. Le Jardin féerique: Lent et grave
  track: Rapsodie espagnole, M.54: 1. Prélude à la nuit: Modéré
  track: Rapsodie espagnole, M.54: 3. Habanera: En demi-teinte et d'un rhythme las
  track: Rapsodie espagnole, M.54: 4. Feria: Assez vif
album: Memories – The Unreleased Recordings 1970-2019
album: Chopin: The Nocturnes
track: 16 Waltzes, Op. 39: 15. Waltz in A Flat
track: Villa-Lobos: A prole do bebê No. 1, W140: VI. A pobrezinha "A boneca de trapo"
track: Le Carnaval des Animaux, R. 125: Le Cygne

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Sonata For 2 Pianos And Percussion, Sz. 110: 3. Allegro non troppo
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duration: PT6M15S
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explicit: false
by artist: Béla Bartók
by artist: Martha Argerich
by artist: Nelson Freire
by artist: Peter Sadlo
by artist: Edgar Guggeis
in album: Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
  type: MusicAlbum
  date published: 1994-01-01
popularity: 11
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: Sonata For 2 Pianos And Percussion, Sz. 110: 3. Allegro non troppo
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  additional property: Tempo (BPM)
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Ma mère l'oye, M.60: 1. Pavane de la Belle au bois dormant: Lent
type: MusicRecording
duration: PT1M38S
duration ms: 98000
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by artist: Maurice Ravel
by artist: Martha Argerich
by artist: Nelson Freire
by artist: Peter Sadlo
by artist: Edgar Guggeis
in album: Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
  type: MusicAlbum
  date published: 1994-01-01
popularity: 5
genre: classical
genre: impressionism
genre: neoclassicism
genre: post-romantic-era
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T23:42:34Z
audio: Ma mère l'oye, M.60: 1. Pavane de la Belle au bois dormant: Lent
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Ma mère l'oye, M.60: 2. Petit Poucet: Très modéré
type: MusicRecording
duration: PT3M0S
duration ms: 180000
explicit: false
by artist: Maurice Ravel
by artist: Martha Argerich
by artist: Nelson Freire
by artist: Peter Sadlo
by artist: Edgar Guggeis
in album: Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
  type: MusicAlbum
  date published: 1994-01-01
popularity: 2
genre: classical
genre: impressionism
genre: neoclassicism
genre: post-romantic-era
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  date published: 2026-07-30T17:23:26Z
audio: Ma mère l'oye, M.60: 2. Petit Poucet: Très modéré
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Ma mère l'oye, M.60: 3. Laideronnette, Impératrice des pagodes: Mouvement de Marche
type: MusicRecording
duration: PT3M17S
duration ms: 197000
explicit: false
by artist: Maurice Ravel
by artist: Martha Argerich
by artist: Nelson Freire
by artist: Peter Sadlo
by artist: Edgar Guggeis
in album: Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
  type: MusicAlbum
  date published: 1994-01-01
popularity: 2
genre: classical
genre: impressionism
genre: neoclassicism
genre: post-romantic-era
isrc code: DEF059303243
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T09:21:18+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc446ee6779c8f4323921ffc20d74d7ad115fb5c7b7a729f4abb959770e10d66d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957048
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957048
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059303243
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-07T14:18:56Z
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 0xc446ee6779c8f4323921ffc20d74d7ad115fb5c7b7a729f4abb959770e10d66d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DEF059303243.
  date published: 2026-07-07T14:18:56Z
audio: Ma mère l'oye, M.60: 3. Laideronnette, Impératrice des pagodes: Mouvement de Marche
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  additional property: Tempo (BPM)
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    value: 143.596
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
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    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.339
  additional property: Energy
    type: PropertyValue
    value: 0.069
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.981
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.335
  additional property: Liveness
    type: PropertyValue
    value: 0.098
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.038
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.291
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Ma mère l'oye, M.60: 4. Les Entretiens de la Belle et de la Bête: Mouvement de Valse très modéré
type: MusicRecording
duration: PT4M22S
duration ms: 262000
explicit: false
by artist: Maurice Ravel
by artist: Martha Argerich
by artist: Nelson Freire
by artist: Peter Sadlo
by artist: Edgar Guggeis
in album: Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
  type: MusicAlbum
  date published: 1994-01-01
popularity: 1
genre: classical
genre: impressionism
genre: neoclassicism
genre: post-romantic-era
isrc code: DEF059303244
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T06:12:55+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x39f52e9d6c7471db811c86a1d705a4d9e70e8e96fcc2942936a8cdc3d6c6b138
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/DEF059303244
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 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 0x39f52e9d6c7471db811c86a1d705a4d9e70e8e96fcc2942936a8cdc3d6c6b138. 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/DEF059303244.
  date published: 2026-07-08T03:20:19Z
audio: Ma mère l'oye, M.60: 4. Les Entretiens de la Belle et de la Bête: Mouvement de Valse très modéré
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 106.637
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.261
  additional property: Energy
    type: PropertyValue
    value: 0.007
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.989
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.799
  additional property: Liveness
    type: PropertyValue
    value: 0.065
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.042
  additional property: Loudness (dB)
    type: PropertyValue
    value: -34.634
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

Ma mère l'oye, M.60: 5. Le Jardin féerique: Lent et grave
type: MusicRecording
duration: PT3M17S
duration ms: 197000
explicit: false
by artist: Maurice Ravel
by artist: Martha Argerich
by artist: Nelson Freire
by artist: Peter Sadlo
by artist: Edgar Guggeis
in album: Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
  type: MusicAlbum
  date published: 1994-01-01
popularity: 4
genre: classical
genre: impressionism
genre: neoclassicism
genre: post-romantic-era
isrc code: DEF059303245
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T03:03:39+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x089d32a2f5af786ae16c6a342995a90d825f57037918cab77ced8d088df3f6eb
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/DEF059303245
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 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 0x089d32a2f5af786ae16c6a342995a90d825f57037918cab77ced8d088df3f6eb. 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/DEF059303245.
  date published: 2026-07-08T03:20:19Z
audio: Ma mère l'oye, M.60: 5. Le Jardin féerique: Lent et grave
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 136.543
  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: 0.488
  additional property: Energy
    type: PropertyValue
    value: 0.016
  additional property: Speechiness
    type: PropertyValue
    value: 0.066
  additional property: Acousticness
    type: PropertyValue
    value: 0.968
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.095
  additional property: Liveness
    type: PropertyValue
    value: 0.175
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.041
  additional property: Loudness (dB)
    type: PropertyValue
    value: -27.259
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Rapsodie espagnole, M.54: 1. Prélude à la nuit: Modéré
type: MusicRecording
duration: PT3M56S
duration ms: 236000
explicit: false
by artist: Maurice Ravel
by artist: Martha Argerich
by artist: Nelson Freire
by artist: Peter Sadlo
by artist: Edgar Guggeis
in album: Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
  type: MusicAlbum
  date published: 1994-01-01
popularity: 2
genre: classical
genre: impressionism
genre: neoclassicism
genre: post-romantic-era
isrc code: DEF059303252
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6eff2501b5746f4c3a8893640118dda9d9771fad46d989a4ad4114e3e1249045
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960368
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960368
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059303252
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T08:26:41Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eff2501b5746f4c3a8893640118dda9d9771fad46d989a4ad4114e3e1249045. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEF059303252.
  date published: 2026-07-31T08:26:41Z
audio: Rapsodie espagnole, M.54: 1. Prélude à la nuit: Modéré
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 133.1
  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: 0.334
  additional property: Energy
    type: PropertyValue
    value: 0.008
  additional property: Speechiness
    type: PropertyValue
    value: 0.044
  additional property: Acousticness
    type: PropertyValue
    value: 0.975
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.921
  additional property: Liveness
    type: PropertyValue
    value: 0.295
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.038
  additional property: Loudness (dB)
    type: PropertyValue
    value: -38.565
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major

Rapsodie espagnole, M.54: 3. Habanera: En demi-teinte et d'un rhythme las
type: MusicRecording
duration: PT2M39S
duration ms: 159000
explicit: false
by artist: Maurice Ravel
by artist: Martha Argerich
by artist: Nelson Freire
by artist: Peter Sadlo
by artist: Edgar Guggeis
in album: Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
  type: MusicAlbum
  date published: 1994-01-01
popularity: 1
genre: classical
genre: impressionism
genre: neoclassicism
genre: post-romantic-era
isrc code: DEF059303254
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T01:58:27+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x077d97b8cc8c7662332be2494cc3404c047dab29bbdf77695950ac00667f4f15
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/DEF059303254
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 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 0x077d97b8cc8c7662332be2494cc3404c047dab29bbdf77695950ac00667f4f15. 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/DEF059303254.
  date published: 2026-07-08T03:22:41Z
audio: Rapsodie espagnole, M.54: 3. Habanera: En demi-teinte et d'un rhythme las
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 96.8
  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: 0.366
  additional property: Energy
    type: PropertyValue
    value: 0.006
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.976
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.509
  additional property: Liveness
    type: PropertyValue
    value: 0.07
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.077
  additional property: Loudness (dB)
    type: PropertyValue
    value: -37.691
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Rapsodie espagnole, M.54: 4. Feria: Assez vif
type: MusicRecording
duration: PT5M26S
duration ms: 326000
explicit: false
by artist: Maurice Ravel
by artist: Martha Argerich
by artist: Nelson Freire
by artist: Peter Sadlo
by artist: Edgar Guggeis
in album: Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
  type: MusicAlbum
  date published: 1994-01-01
popularity: 2
genre: classical
genre: impressionism
genre: neoclassicism
genre: post-romantic-era
isrc code: DEF059303251
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T02:06:38+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x400fc529a2bd9db6e110da3bca89cffbb96e5c65991eaf8c2927e755941b2181
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960337
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960337
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059303251
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T02:51:48Z
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 0x400fc529a2bd9db6e110da3bca89cffbb96e5c65991eaf8c2927e755941b2181. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEF059303251.
  date published: 2026-07-31T02:51:48Z
audio: Rapsodie espagnole, M.54: 4. Feria: Assez vif
  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)
    type: PropertyValue
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  additional property: Time Signature
    type: PropertyValue
    value: 6
  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: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
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Memories – The Unreleased Recordings 1970-2019
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date published: 2022-10-14
track: Orfeo ed Euridice, Wq. 30: Mélodie (Dance of the Blessed Spirits) (Arr. Sgambati for Piano)
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  duration: PT3M16S
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  explicit: false
  by artist: Christoph Willibald Gluck
  by artist: Nelson Freire
  in album: Memories – The Unreleased Recordings 1970-2019
    type: MusicAlbum
    date published: 2022-10-14
  popularity: 7
  genre: classical
  genre: opera
  isrc code: GBBBC2200923
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  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
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track: Piano Concerto No. 4 in G Major, Op. 58: I. Allegro moderato (Cadenza: Saint-Saëns)
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track: Piano Concerto No. 1, BB 91, Sz. 83: III. Allegro molto
track: Piano Concerto No. 2 in B-Flat Major, Op. 83: I. Allegro non troppo
track: Piano Concerto No. 2 in B-Flat Major, Op. 83: III. Andante - Più adagio
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Andante favori, WoO 57
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Piano Concerto No. 4 in G Major, Op. 58: I. Allegro moderato (Cadenza: Saint-Saëns)
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Piano Concerto No. 4 in G Major, Op. 58: II. Andante con moto
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Piano Concerto No. 4 in G Major, Op. 58: III. Rondo (Vivace) (Cadenza: Saint-Saëns)
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11 Bagatelles, Op. 119: Bagatelle, Op. 119, No. 11 (Andante, ma non troppo)
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audio: 11 Bagatelles, Op. 119: Bagatelle, Op. 119, No. 11 (Andante, ma non troppo)
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Burlesque in D Minor for Piano and Orchestra, AV 85
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La plus que lente, CD 128
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Bachianas Brasileiras No. 4, W264: I. Prelúdio (Introdução)
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Piano Concerto No. 1, BB 91, Sz. 83: I. Allegro moderato - Allegro
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Piano Concerto No. 1, BB 91, Sz. 83: II. Andante
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Piano Concerto No. 1, BB 91, Sz. 83: III. Allegro molto
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Piano Concerto No. 2 in B-Flat Major, Op. 83: I. Allegro non troppo
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genre: classical
genre: german-romanticism
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Piano Concerto No. 2 in B-Flat Major, Op. 83: III. Andante - Più adagio
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Intermezzo in A Major, Op. 118, No. 2
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Chopin: The Nocturnes
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16 Waltzes, Op. 39: 15. Waltz in A Flat
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Villa-Lobos: A prole do bebê No. 1, W140: VI. A pobrezinha "A boneca de trapo"
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Le Carnaval des Animaux, R. 125: Le Cygne
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  date published: 2026-07-02T05:09:12Z
audio: Le Carnaval des Animaux, R. 125: Le Cygne
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