thumb|Ossip Gabrilowitsch in 1915 thumb|right|Ossip Gabrilowitsch with his wife Clara Clemens Ossip Salomonovich Gabrilowitsch (Осип Сoломонович Габрилович, Osip Solomonovich Gabrilovich; he used the
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 0xbce5e96e5e492cbaf477aeaa8b39f1e5c19944a7da076b0f3394943e4c9aad06. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2a62cf2-86d5-4728-9949-4c6d1a40280b.json and https://artists.proofprofile.net/proofs/artist/c2a62cf2-86d5-4728-9949-4c6d1a40280b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Homage to Godowsky: Piano Works Dedicated to Leopold Godowsky
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 0x664a4c625e5104a53feae1884f1bbeb71974e1e3bf5e267e4cb67bd3a6e64b5a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY2031001 — a six-check JSON result.
Melodia appassionata in E Minor, Op. 81 No. 6
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Masters of the Roll: Ossip Gabrilowitsch & Olga Samaroff
Romance Without Words In A Flat Minor, Op. 17 No. 3
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Classical SoundScapes For Film Vol, 24: Ossip Gabrilowitsch & Olga Samaroff
Classical SoundScapes For Film Vol, 3: Ossip Gabrilowitsch & Olga Samaroff
Piano Sonata No.3 In B Minor Op.58: 1st Movement Allegro Maestoso
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The Flonzaley Quartet Play Romantic Masterpieces
Ossip Gabrilowitsch Performs Original Piano Works
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Idyll. Heritage Piano Music of Beethoven & Schumann
Bagatelles, Op. 119: No. 11, Andante Ma Non Troppo.
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Éclats. Piano Music from the Golden Age (Extended Edition)
"063 Classical Music Evocations": Rigaudon
"054 Classical Music Essentials": Far Blue
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6802f378df29bba6b54bf97ebe4aed5b98cc67d5335217035a484427bbc7bfa5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1QW2501269 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dd0cce2a0575bf3e54b20043c176bfc46298b74f64badc2cf363002efbd1e9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1QW2500178 — a six-check JSON result.
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Clarinet Concerto in A Major KV 622 (Piano Transcription by Hans-Günter Heumann): II. Adagio
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Six Studies in English Folk Song (Arr. Flute & Piano by Katrina Penman): I. Adagio
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6 Lieder Ohne Worte, Op. 18 in E-Dur: Vi. Am Arno. Wiegend Und Weich
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6 Klavierstucke Intermezzo in A Major, Op. 118 No. 2
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26139763f523aff0017a1bcd670118492f85db44838fb58ecc6dfe89f973cf44. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82502248 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856859b24fb1c8a4313dcef8ee2cbd3d34e207e00434fb97a6d4740be1e63951. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82502989 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338afc1cb984dbacdd6ec3d5f5eac415285165f3a1e2ad17ac7ec367a70c52eb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82511989 — a six-check JSON result.
Impromptus on a Theme by Clara Schumann, Op. 5: No. 6, Schnell
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Prelude No. 5 in D Major, BWV 850 (Arr. Flute & Piano by Katrina Penman)
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'Greetings', Miniaturas para Piano: 3 Palabras: 'a por Ello'
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Impromptus on a Theme by Clara Schumann, Op. 5: No. 5, Lebhafter
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Preludes, Op. 23: Prelude in B-Flat Major, Op. 23, No. 2
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Pictures at an Exhibition: Il Vecchio Castello
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Sonate Brillante C-Moll: I. Allegro Con Spirito
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Wellenspiel. Op. 14, No. 1 - Duo-Art 5653
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Sonata No. 1, Op. 24. IV. Perpetual Motion (Rondo) - Duo-Art 6489
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Military Marches, Op. 51: No. 3, Marche Militaire in E-Flat Major - Welte-Mignon 3309
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Nocturne in D-Flat Major, Op. 27, No. 2 - Welte-Mignon 1194
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Legende S. 175: No. 1, St. Francis of Assisi Preaching to the Birds - Duo-Art 5718
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Funf Charakterstucke, Op. 32: No. 3, Rustle of Spring (Fruhlingsrauschen) - Welte-Mignon 375
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Fantasiestucke, Op. 12: No. 3, Warum? - Welte-Mignon 168
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Bunte Blatter (Colorful Leaves) Op. 99: No. 9, Novelette in B Minor - Duo-Art 7284
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18 Pieces for Piano, Op. 72: No.4 , Danse Characteristique - Duo-Art 6244
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In a Nutshell Suite: No. 4, Gumsucker's March (4 Hands Piano) - Duo-Art 6059
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Impromptu No. 1, Op. 29, A-Flat Major - Duo-Art 6481
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Virtuoso Studies, Op. 46: No. 12, Polonaise - Welte-Mignon 2998
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Romance in C-Sharp Minor - Welte-Mignon 1453
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Waltz, Op. 42 (Grand Valse) in A-Flat Major - Welte-Mignon 245
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Fantasia and Fugue in G Minor, BWV 542 (Transcription by Liszt): Part II - Duo-Art 7174
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Jocelyn (Arr. Solo Piano by Adler): Berceuse - Duo-Art 5746
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Klezmer Suite, for Clarinet, Viola, Piano and Double Bass: III. Allegro Vivace, Presto
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Adagio in B Minor K. 540 - Welte-Mignon 621
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Die Zauberflote (The Magic Flute): Overture (Arr. 4 Hands Piano by Ganz) - Duo-Art 536-4
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Hungarian Rhapsodies, S. 244: No. 10 - Duo-Art 6568-0
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Ein Heldenleben (A Hero's Life) Op. 40 (Arr. For Solo Piano by Strauss): Love Scene (Liebesszene) - Welte-Mignon 1184
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Le Rouet D' Omphale, Op. 31 (Arr. Solo Piano by Saint-Saëns) - Welte-Mignon 798
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Chromatic Fantasia and Fugue in D Minor BWV. 903: Fantasia - Duo-Art 7316
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Preludes, Op. 23: No. 5 in G Minor - Triphonola 51661
Oubliée. Heritage Piano of Liszt, Chopin & Rachmaninoff
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Romance Sans Paroles, Op. 17 No. 3 - Duo-Art 5659
Les Sylvains. Piano Evocations from the Golden Age
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Barcarolle No. 3, Op. 50 in G Minor - Triphonola T-51897
Decorations. Piano Evocations from the Golden Age
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