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description: Leonid Hambro (June 26, 1920 – October 23, 2006) was an American concert pianist and composer. Life Hambro was born in Chicago, the son of immigrant Lithuanian Jews; his father was a pianist accompan
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Sonata for Cello and Basso continuo in G Major: III. Vivace
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Sonata for Arpeggione and Piano in A Minor, D. 821: I. Allegro moderato
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Sonata for Cello and Basso continuo in G Major: I. Allegro
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Sonata for Cello and Basso continuo in G Major: II. Grave
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  date published: 2026-07-31T00:26:26Z
audio: Sonata for Cello and Basso continuo in G Major: II. Grave
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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Cello Sonata in A Minor, Op. 36 (Remastered): I. Allegro agitato
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duration ms: 607293
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by artist: Edvard Grieg
by artist: Leonard Rose
by artist: Leonid Hambro
in album: Franck: Cello Sonata in A Major, FWV 8 & Grieg: Cello Sonata in A Minor, Op. 36 (Remastered)
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  date published: 2018-05-25
genre: classical
genre: late-romantic-era
genre: norwegian-classical
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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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118afe61f13fe141bef63fc6c917f7ff1e37a833cfdb234f54e5d55452f47987. 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/USSM11708336.
  date published: 2026-07-08T03:22:41Z
audio: Cello Sonata in A Minor, Op. 36 (Remastered): I. Allegro agitato
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Capriccio: I. Allegro
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duration: PT4M4S
duration ms: 244760
explicit: false
by artist: Leoš Janáček
by artist: Eric Simon
by artist: Leonid Hambro
by artist: The Boston Brass Ensemble
in album: Thuille - Dvořák - Telemann - Reicha - Piston - Rimsky-Korsakov - Janáček
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  date published: 2020-11-16
genre: classical
genre: czech-classical
genre: early-modern-classical
genre: contemporary-classical
genre: post-romantic-era
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T08:26:41Z
audio: Capriccio: I. Allegro
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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Capriccio: II. Adagio
type: MusicRecording
duration: PT4M51S
duration ms: 291010
explicit: false
by artist: Leoš Janáček
by artist: Eric Simon
by artist: Leonid Hambro
by artist: The Boston Brass Ensemble
in album: Thuille - Dvořák - Telemann - Reicha - Piston - Rimsky-Korsakov - Janáček
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  date published: 2020-11-16
genre: classical
genre: czech-classical
genre: early-modern-classical
genre: contemporary-classical
genre: post-romantic-era
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T02:19:15Z
audio: Capriccio: II. Adagio
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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Capriccio: III. Allegretto
type: MusicRecording
duration: PT3M30S
duration ms: 210450
explicit: false
by artist: Leoš Janáček
by artist: Eric Simon
by artist: Leonid Hambro
by artist: The Boston Brass Ensemble
in album: Thuille - Dvořák - Telemann - Reicha - Piston - Rimsky-Korsakov - Janáček
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  date published: 2020-11-16
genre: classical
genre: czech-classical
genre: early-modern-classical
genre: contemporary-classical
genre: post-romantic-era
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T12:24:41Z
audio: Capriccio: III. Allegretto
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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: CopyrightID
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additional property: OTSVerificationAPI
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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Capriccio: IV. Andante
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duration: PT6M20S
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by artist: Leoš Janáček
by artist: Eric Simon
by artist: Leonid Hambro
by artist: The Boston Brass Ensemble
in album: Thuille - Dvořák - Telemann - Reicha - Piston - Rimsky-Korsakov - Janáček
  type: MusicAlbum
  date published: 2020-11-16
genre: classical
genre: czech-classical
genre: early-modern-classical
genre: contemporary-classical
genre: post-romantic-era
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T02:19:15Z
audio: Capriccio: IV. Andante
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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CopyrightID
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CopyrightStatus
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CopyrightRegisteredAt
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CopyrightChainExplorerURL
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OTSHash
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OTSBitcoinBlock
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OTSBitcoinBlockVerifyURL
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OTSVerificationAPI
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OTSTimestamp
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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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329886ce99f1e10e2e8f8fa09f0048c0f6dbbb0cc3ce8598e6f9a691c87d0cbd. 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/UKJE72000183.
date published: 2026-07-08T03:20:19Z

Sextet in B-Flat, Op. 6: II. Larghetto
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Sextet in B-Flat, Op. 6: IV. Finale. Molto vivace
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Wind Quintet in E-Flat Major, Op. 88, No. 2: III. Poco andante - Grazioso
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Quintet for Wind Instruments: III. Scherzando
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Quintet for Wind Instruments: IV. Allegro comodo
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Suite in B-Flat Major, Op. 4: III. Gavotte
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Drucker Plays Brahms
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Prokofiev & Stravinsky: Chamber Works
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The Essential Bernstein
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Borge's Back - Recorded Live
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Ricardo Odnoposoff, Vol. 1
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Aaron Copland Premieres: Concerto for Clarinet & String Orchestra, Sextet for String Qt, Clarinet & Piano, Qt. for Piano & Strings
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Camille Saint-Saens Carnival Of The Animals; Walton Facade
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Milestones of a Violin Legend: Ricardo Odnoposoff, Vol. 4
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The Art of Robert Bloom: Chamber Music, Vol. 3
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Milestones of a Cello Legend: Leonard Rose, Vol. 5
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Cook's Tour of High Fidelity
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Milhaud: Symphonie No. 1, Suite française & Cantate de l'enfant et de la mère (Mono Version)
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