Olga Samaroff
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description: Olga Samaroff (born Lucy Mary Agnes Hickenlooper; August 8, 1880May 17, 1948) was an American pianist, music critic, and teacher. Among her teachers was Charles-Valentin Alkan's son, Élie-Miriam Delab
popularity: 2
followers: 138
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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: 2023-07-28
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T03:20:19Z
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-31T02:51:48Z
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  track: Samson Et Dalila: My Heart at Thy Sweet Voice - Welte-Mignon 2260
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  track: Feuillet D'album Iec. 16 - Duo-Art 6969
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album: Women of Piano. Great Female Pianists of the Golden Age, Vol. 2
album: Éphémères. Piano Music from the Golden Age
album: Masters of the Roll: Ossip Gabrilowitsch & Olga Samaroff
album: Classical SoundScapes For Film Vol, 24: Ossip Gabrilowitsch & Olga Samaroff
album: Classical SoundScapes For Film Vol, 3: Ossip Gabrilowitsch & Olga Samaroff
album: Piano Soundscapes, Vol. 7
album: Schmetterling. Piano Music by Chopin, Schumann and Legacy
album: Women of Piano. Great Female Pianists of the Golden Age
album: Women of Piano. Great Female Artists of the Golden Age
album: Spring. Beethoven, Grieg & Legacy
album: Zephrys. Piano Evocations from the Golden Age
album: Aeolian Murmurings. Piano Evocations from the Golden Age
album: Wanderer. Schubert & Beethoven from the Golden Age
album: Women At The Piano - An Anthology Of Historic Performances, Vol. 2 (1926-1950)
album: Romanze. Heritage Chopin, Grieg & Tchaikovsky
album: Beethoven, Chopin & Others: Piano Works (2024 Remaster)
album: Sonderausgabe für Augustinermuseum Freiburg: Johannes Brahms, Vol. 2
album: "Souvenirs" - 20th Century Classical Piano Rolls
album: Edvard Grieg: The Piano Music in Historic Interpretations
album: Mirages. Hidden Treasures of Classical Piano (Extended Edition)
album: Bach, J.S.: Piano Transcriptions, Vol. 1 (Great Pianists) (1925-1947)
album: The World's Greatest Pianists, Volume Two
album: Welte-Mignon Piano Rolls, Vol. 3 (1905-1926)
album: Keyboard Giants of the Past
album: Éphémères. Piano Music from the Golden Age (Extended Edition)
album: Classical Masterworks: Classical Compositions of the 19th Century, Vol. 2

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Samson Et Dalila: My Heart at Thy Sweet Voice - Welte-Mignon 2260
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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
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Impromptu No.2, Op. 31 in F Minor - Welte-Mignon 1481
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Feuillet D'album Iec. 16 - Duo-Art 6969
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T14:36:16Z
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Album Leaf. Op. 28: No. 3, Dance Caprice - Due-Art 04 Br
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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/960360
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82307363
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T06:42:11Z
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 0xd6d9a16a140fc3099c7a11e1fb2bcaf1933d24f974d847fa7acf2a70dc14c729. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEPI82307363.
  date published: 2026-07-31T06:42:11Z
audio: Album Leaf. Op. 28: No. 3, Dance Caprice - Due-Art 04 Br
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Women of Piano. Great Female Pianists of the Golden Age, Vol. 2
type: MusicAlbum
date published: 2023-09-22
track: Etude De Concert, Op. 2, No. 6, Si Oiseau J'etais, "Were I a Bird" - Welte-Mignon 1654
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  by artist: Adolph von Henselt
  by artist: Peter Phillips
  by artist: Annie Cory
  by artist: Adolf von Henselt
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    type: MusicAlbum
    date published: 2023-09-22
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  additional property: CopyrightRegisteredAt
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
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  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82319902
  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 0xd91cc2d40389bdd3b34e2ce8ec08c662b57f46fb2df4354fa429a924bb2d0d37. 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/DEPI82319902.
    date published: 2026-07-08T03:20:19Z
  audio: Etude De Concert, Op. 2, No. 6, Si Oiseau J'etais, "Were I a Bird" - Welte-Mignon 1654
    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
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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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track: Landler (Tirolese) - Duo-Art 6110
  type: MusicRecording
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  explicit: false
  by artist: Giovanni Sgambati
  by artist: Peter Phillips
  by artist: Winifred Byrd
  in album: Women of Piano. Great Female Pianists of the Golden Age, Vol. 2
    type: MusicAlbum
    date published: 2023-09-22
  popularity: 2
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  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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  additional property: CopyrightRegisteredAt
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  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x9726a778b7b02905827ebef7a0c830ad7367454b22da5eabf2094fad65f6fe60
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  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/DEPI82313495
  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 0x9726a778b7b02905827ebef7a0c830ad7367454b22da5eabf2094fad65f6fe60. 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/DEPI82313495.
    date published: 2026-07-08T03:20:19Z
  audio: Landler (Tirolese) - Duo-Art 6110
    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: 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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    additional property: Loudness (dB)
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    additional property: Key Name
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track: Pieces, Op. 2: No. 1, Etude in C-Sharp Minor - Duo-Art 7325
  type: MusicRecording
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  by artist: Alexander Scriabin
  by artist: Peter Phillips
  by artist: Isabelle Yalkowsky
  in album: Women of Piano. Great Female Pianists of the Golden Age, Vol. 2
    type: MusicAlbum
    date published: 2023-09-22
  genre: classical
  genre: late-romantic-era
  genre: early-modern-classical
  genre: contemporary-classical
  genre: impressionism
  genre: russian-romanticism
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  additional property: CopyrightStatus
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
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  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Pieces, Op. 2: No. 1, Etude in C-Sharp Minor - Duo-Art 7325
track: Chaconne in G Major HWV 435 - Welte-Mignon 1106
track: Gavotte and Variations (Arr. By Leschetizky) - Duo-Art 6217

CopyrightChainExplorerURL
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value: https://explorer.copyrightchains.com/tx/0x5f1d4dfd07924ba623ef05d8f6296cb62382222ffb36de97c57d59e0cb3464d0

OTSHash
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OTSBitcoinBlock
type: PropertyValue
value: 957118

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957118

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82312842

OTSTimestamp
type: PropertyValue
value: 2026-07-08T03:20:19Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1d4dfd07924ba623ef05d8f6296cb62382222ffb36de97c57d59e0cb3464d0. 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/DEPI82312842.
date published: 2026-07-08T03:20:19Z

Pieces, Op. 2: No. 1, Etude in C-Sharp Minor - Duo-Art 7325
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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Chaconne in G Major HWV 435 - Welte-Mignon 1106
type: MusicRecording
duration: PT5M41S
duration ms: 341588
explicit: false
by artist: George Frideric Handel
by artist: Peter Phillips
by artist: Elly Ney
in album: Women of Piano. Great Female Pianists of the Golden Age, Vol. 2
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genre: classical
genre: opera
genre: early-music
genre: baroque
genre: english-baroque
genre: german-baroque
genre: choral
isrc code: DEPI82308740
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/DEPI82308740
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e36f68ff12e8acb150c301915765874f09302b7fe576f3971b6f3d2dcbb391. 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/DEPI82308740.
  date published: 2026-07-08T03:20:19Z
audio: Chaconne in G Major HWV 435 - Welte-Mignon 1106
  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
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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Gavotte and Variations (Arr. By Leschetizky) - Duo-Art 6217
type: MusicRecording
duration: PT6M46S
duration ms: 406728
explicit: false
by artist: Jean-Philippe Rameau
by artist: Peter Phillips
by artist: Ethel Leginska
in album: Women of Piano. Great Female Pianists of the Golden Age, Vol. 2
  type: MusicAlbum
  date published: 2023-09-22
isrc code: DEPI82310686
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/DEPI82310686
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eec3053725bc0ffc18e9a7dfec371a5f895441c425f3ad7ee7c3013ca728121. 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/DEPI82310686.
  date published: 2026-07-08T03:20:19Z
audio: Gavotte and Variations (Arr. By Leschetizky) - Duo-Art 6217
  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
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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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Éphémères. Piano Music from the Golden Age
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date published: 2024-01-09

Masters of the Roll: Ossip Gabrilowitsch & Olga Samaroff
type: MusicAlbum
date published: 2019-11-12
track: Romance Without Words In A Flat Minor, Op. 17 No. 3
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  duration: PT2M27S
  duration ms: 147760
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  by artist: Denis Condon
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    type: MusicAlbum
    date published: 2019-11-12
  genre: classical-piano
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  additional property: CopyrightID
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
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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 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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Classical SoundScapes For Film Vol, 3: Ossip Gabrilowitsch & Olga Samaroff
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    date published: 2026-07-31T05:17:02Z
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Piano Soundscapes, Vol. 7
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Schmetterling. Piano Music by Chopin, Schumann and Legacy
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  subject of: OpenTimestamps Proof of Existence
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  subject of: OpenTimestamps Proof of Existence
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track: Humoresques, Op. 101: No. 7, Poco Lento E Grazioso (G♭ Major) - Welte-Mignon 1324
track: Impromptu No. 1, Op. 29, A-Flat Major - Welte-Mignon 455
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date published: 2026-07-08T03:20:19Z

Lyrische Stucke, Op. 43: No. 4, Voeglein Birdling (Little Bird) - Welte-Mignon 1277
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Humoresques, Op. 101: No. 7, Poco Lento E Grazioso (G♭ Major) - Welte-Mignon 1324
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subject of: OpenTimestamps Proof of Existence
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subject of: OpenTimestamps Proof of Existence
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Fantasie Impromptu, Op. 66, C-Sharp Minor - Duo-Art 6058
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by artist: Harold Bauer
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popularity: 12
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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: 2026-07-31T21:25:57Z
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Women of Piano. Great Female Pianists of the Golden Age
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Women of Piano. Great Female Artists of the Golden Age
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T02:19:15Z
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Spring. Beethoven, Grieg & Legacy
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Zephrys. Piano Evocations from the Golden Age
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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track: Inca Nocturne No. 5 - Duo-Art 6191
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-29T22:13:32Z
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Aeolian Murmurings. Piano Evocations from the Golden Age
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:22:41Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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track: Waltz, Op. 39, No. 15 A-Flat Major - Duo-Art 5642.
track: Valse Nonchalante. Op. 110 in D-Flat Major - Duo-Art 5831

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OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/960429

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82437476

OTSTimestamp
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value: 2026-07-31T16:07:24Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dc0b7e40a45f628cc90ba99b7075f380714d39e7e41be3cac1fe3500694c8e. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEPI82437476.
date published: 2026-07-31T16:07:24Z

Waltz, Op. 39, No. 8 - Welte-Mignon 590
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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: Valence (Positivity)
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Waltz, Op. 39, No. 15 A-Flat Major - Duo-Art 5642.
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by artist: Johannes Brahms
by artist: Alexander Raab
by artist: Peter Phillips
in album: Aeolian Murmurings. Piano Evocations from the Golden Age
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genre: classical
genre: german-romanticism
genre: classical-piano
genre: late-romantic-era
genre: chamber-music
genre: orchestral
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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 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: Waltz, Op. 39, No. 15 A-Flat Major - Duo-Art 5642.
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Valse Nonchalante. Op. 110 in D-Flat Major - Duo-Art 5831
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by artist: Camille Saint-Saëns
by artist: Peter Phillips
in album: Aeolian Murmurings. Piano Evocations from the Golden Age
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genre: classical
genre: late-romantic-era
genre: french-romanticism
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additional property: OTSBitcoinBlockVerifyURL
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc509edc85d1204a263e37fb8bdd3086e55a41579fc25e522057afabf8bde87e7. 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/DEPI82437489.
  date published: 2026-07-08T03:20:19Z
audio: Valse Nonchalante. Op. 110 in D-Flat Major - Duo-Art 5831
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Wanderer. Schubert & Beethoven from the Golden Age
type: MusicAlbum
date published: 2024-08-09

Women At The Piano - An Anthology Of Historic Performances, Vol. 2 (1926-1950)
type: MusicAlbum
date published: 2006-07-25

Romanze. Heritage Chopin, Grieg & Tchaikovsky
type: MusicAlbum
date published: 2024-05-22
track: The Seasons, Op. 37a: No. 6, Barcarolle (June) - Duo-Art 7128
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  by artist: Peter Phillips
  by artist: Nadia Reisenberg
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82308084
  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
    type: DigitalDocument
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    date published: 2026-07-08T03:53:27Z
  audio: The Seasons, Op. 37a: No. 6, Barcarolle (June) - Duo-Art 7128
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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Beethoven, Chopin & Others: Piano Works (2024 Remaster)
type: MusicAlbum
date published: 2024-06-07

Sonderausgabe für Augustinermuseum Freiburg: Johannes Brahms, Vol. 2
type: MusicAlbum
date published: 2021-01-15

"Souvenirs" - 20th Century Classical Piano Rolls
type: MusicAlbum
date published: 2025-05-08

Edvard Grieg: The Piano Music in Historic Interpretations
type: MusicAlbum
date published: 1999-09-17
track: Til Våren
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  by artist: Arthur De Greef
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  genre: late-romantic-era
  genre: norwegian-classical
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  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
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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
    type: DigitalDocument
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    date published: 2026-07-31T17:29:52Z
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    additional property: Mode (Major/Minor)
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    additional property: Acousticness
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track: Trolltog
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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 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 0xc0ac9d0a4172a5f989091288d0470f79bf2a5f790ae53fec90812695b0d53a27. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/NOFZS9218100.
    date published: 2026-07-30T21:00:46Z
  audio: Trolltog
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    additional property: Mode (Major/Minor)
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Mirages. Hidden Treasures of Classical Piano (Extended Edition)
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date published: 2023-09-08
track: Scherzo No.1 in B-Flat Major (Posthumous) D.593 - Welte-Mignon 915
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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 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 0x39e603ced784eb45be538e9367b1a5266e0ff2838d0069ce1e2292c3b4dd444c. 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/DEPI82307175.
    date published: 2026-07-08T03:20:19Z
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