Beryl Rubinstein (October 26, 1898 – December 29, 1952) was an American pianist, composer, and teacher. He was the father of social historian David Rubinstein. He married Elsa Landesman who attended
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc0680a385adc44300b58da79fdf62ccc6ded51b524d4b3e4cea45eb6c638b8. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/981db25f-eaa3-4ab3-9759-b678684c066f.json and https://artists.proofprofile.net/proofs/artist/981db25f-eaa3-4ab3-9759-b678684c066f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Éphémères. Piano Music from the Golden Age
Miniatures. Hidden Treasures of Heritage Piano
From County Derry. Grainger, Bach & Masterworks from Golden Age of the Piano
12 Petite Pieces Pour Le Clavecin: No. 10 Andante
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6069ad9e4d713ab326a1bd5d6b17a428fcc959637bb937c973d459d09f7b683. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEPI82412566.
12 Petite Pieces Pour Le Clavecin: No. 11 Menuetto-Trio
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12 Petite Pieces Pour Le Clavecin: No. 12 Allegretto
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12 Petite Pieces Pour Le Clavecin: No. 8 Andante
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12 Petite Pieces Pour Le Clavecin: No. 9 Menuetto Allegretto-Trio
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Danseuses De Delphes. Piano Music of Debussy, Mendelssohn and Chopin
Aeolian Murmurings. Piano Evocations from the Golden Age
Aeolian Murmurings. Op. 123 (Concert Study) - Duo-Art 5797
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Valse Sentimentale. Op. 51, No. 6 - Welte-Mignon 1679
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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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Le Vent Dans La Plaine. Debussy, Beethoven, Mozart and Legacy.
Horizons. Piano Music of Mozart & Chopin
Piano Sonata No. 18 in in D Major, K. 576: II. Adagio - Duo-Art 67760
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Decorations. Piano Evocations from the Golden Age
Barcarolle No. 3, Op. 50 in G Minor - Triphonola T-51897
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Nutcracker Suite, Op. 17a (Arr. Solo Piano by Giorni): Dance of the Reed Flutes (Danse Des Mirlitons) - Duo-Art 6132
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Marble Halls. Piano Revelations from the Golden Age
Spanish Romance, Op. 74 - The Smuggler (Arr. For Solo Piano by Carl Tausig) - Duo-Art 7072
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Valse Mignonne, Op. 104 in E-Flat Major - Welte-Mignon 803
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Jesus Bleibet Meine Freude. Bach, Brahms, Debussy & Contemporaries.
Jesus Bleibet Meine Freude, BWV 147 (Arr. Solo Piano by Bauer) - Upon Piano Roll Duo-Art 7371, Issued 1913
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Piano Recital: Glazier, Richard - Wild, E. / Gershwin, G.
7 Virtuoso Etudes after Gershwin: No. 4. Embraceable You
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7 Virtuoso Etudes after Gershwin: No. 5. Somebody Loves Me
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Of Thee I sing, Act II: Jilted I'm about to be a mother (arr. for piano)
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Strike up the Band: Meadow Serenade (arr. for piano)
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The Goldwyn Follies: Love Walked In (arr. P. Grainger)
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Lady, be Good!: The Man I Love (arr. P. Grainger)
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3 Preludes: No. 2 in C-Sharp Minor: Andante con moto e poco rubato
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3 Preludes: No. 3 in E-Flat Minor: Allegro ben ritmato e deciso
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Two Grands, Four Hands: Novelty Piano Duos of the 1920s and 1930s
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Bolero. Piano Evocations from the Golden Age
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Bolero (Arr. Solo Piano by Ganz) - Duo-Art 74728
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Prélude À L'après-Midi D'un Faune (Arr. For Solo Piano by E. Robert Schmitz) - Duo-Art 6532
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La Nuit. Russian Piano Music from the Golden Age
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Sonatina for flute & piano: I. Allegretto grazioso
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Sonatina for flute & piano: II. Andantino sognando
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Sonatina for flute & piano: III. Allegro giocoso
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Arabesque. Piano Transcriptions of Debussy, Sibelius and Verdi