alt=Pianist Vadim Chaimovich performing on a Bösendorfer grand piano on the stage of the Onoldia Concert Hall in Ansbach, Germany, on October 22, 2015|thumb|300px|Vadim Chaimovich performing at the On
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 0x368c86b5174a2d49cb25f1e64e363e996239afce710a7d56ff001719abfa0211. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/880416b0-ed3a-4cd7-bc81-cd2f086297c4.json and https://artists.proofprofile.net/proofs/artist/880416b0-ed3a-4cd7-bc81-cd2f086297c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chopin - Mendelssohn - Rachmaninoff - Czerny
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 0x513de1866216ed85f225bb2af7782391b1bce1f7df41652fba326c84abb9cb00. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NOAV61600101.
Chopin, Mendelssohn, Rachmaninoff & Czerny: Piano Works
Frédéric Chopin: Nocturne in E-Flat Major, Op. 9, No. 2
Pyotr Tchaikovsky: The Seasons, Op. 37b: VI. June: Barcarolle (Live)
Frédéric Chopin: Nocturne in B-Flat Minor, Op. 9, No. 1
Frédéric Chopin: Nocturne in C-Sharp Minor, Op. Posth.
Robert Schumann: Kinderszenen, Op. 15 "Scenes from Childhood": VII. Träumerei (Dreaming) in F Major [Live]
Franz Schubert: Schwanengesang, D. 957: IV. Ständchen (Serenade) [Arr. for Piano Solo by Franz Liszt]
Contrasts (Live): Galuppi: Piano Sonata No. 5 – Beethoven: 10 Variations WoO 73 – Chopin: Mazurkas Op. 63 Nos 2 & 3, Nocturne Op. 9 No. 2 – Schubert: Impromptu Op. 142 No. 3 – Schumann: Kinderszenen, Op. 15 – Medtner: Sonata tragica, Op. 39 No. 5
Piano Sonata No. 5 in C Major: I. Andante (Live)
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Piano Sonata No. 5 in C Major: II. Allegro (Live)
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Piano Sonata No. 5 in C Major: III. Vivace (Live)
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Felix Mendelssohn: Songs Without Words, Book 2, Op. 30: No. 6 in F-Sharp Minor "Venetian Boat Song"
Frédéric Chopin: 24 Préludes, Op. 28: No. 4 in E Minor
Frédéric Chopin: 24 Préludes, Op. 28: No. 15 in D-Flat Major "Raindrop"
Felix Mendelssohn: Songs Without Words, Book 1, Op. 19b: No. 1 in E Major
Viennese Classics for Piano: Haydn: Sonata No. 30, Hob. XVI:19 – Mozart: Rondo, K. 485, Sonata No. 12, K. 332 – Beethoven: Rondo, Op. 51, No. 1, Sonata No. 5, Op. 10, No. 1 – Schubert: Sonata No. 13, D. 664
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Solo Piano Masterpieces: The Classical Era, Vol. 1
Piano Sonata No. 5 in C Major: I. Andante - Live Recording
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Solo Piano Masterpieces: The Classical Era (Vol. III)
Solo Piano Masterpieces: The Romantic Era, Vol. IV
Songs Without Words, Book 1, Op. 19b: No. 1, Andante con moto, MWV U86
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Schwanengesang, D. 957: No. 4, Ständchen - Arr. by Franz Liszt
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Solo Piano Masterpieces: The Baroque Era, Vol. 6 (Live)
Piano Sonatas: Mozart, Mendelssohn, Brahms, Medtner (Live)
Masterworks in Old Style: Buxtehude, Pachelbel, Haydn, Grieg
From Holberg's Time, Op. 40 "Suite in Olden Style": I. Praeludium. Allegro vivace
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3 Morceaux, Op. 11: No. 1, Prelude in B Minor
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3 Morceaux, Op. 57: No. 1, Prelude in D-Flat Major
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Little Suite for Piano: II. Waltz in A minor
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Little Suite for Piano: IV. Waltz in G minor
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The School of Velocity, Op. 299: No. 9 in C Major, Molto allegro
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6 Dance Caprices, ScharWV 38: No. 2, Waltz in C-Sharp Minor
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Consolations, S. 172: No. 3 in D-Flat Major - Live
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The Well-Tempered Clavier, Book I: Prelude in E Minor, BWV 855a - Arr. for Piano by A. Siloti
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Suite No. 1 in B-Flat Major, HWV 434: IV. Menuet - Arr. for Piano by W. Kempff
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Schubert, Moszkowski, Rachmaninoff: Moments Musicaux
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莫札特: 鋼琴奏鳴曲第十二號第二樂章
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The Seasons, Op. 37a: No. 2, February. The Carnival
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Waltzes, Op. 64: No. 1 in D-Flat Major "Minute Waltz"
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