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 0xeb6a97cf09278802ac36ef5596aa26defd60264411b726d53d1aa38a2a152d84. 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/bea0c035-45cb-4157-a8e4-28f3577c604d.json and https://artists.proofprofile.net/proofs/artist/bea0c035-45cb-4157-a8e4-28f3577c604d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Concerto en ré mineur pour deux pianos et orchestre: I. Allegro ma non troppo
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
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Holberg Suite (for string orchestra), Op. 40; I Prelude
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Holberg Suite (for string orchestra), Op. 40; II Sarabande
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Holberg Suite (for string orchestra), Op. 40; III Gavotte. Musette
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Holberg Suite (for string orchestra), Op. 40; IV Air
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Holberg Suite (for string orchestra), Op. 40; V Rigaudon
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Holberg Suite (for piano solo), Op. 40; I Prelude
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Holberg Suite (for piano solo), Op. 40; II Sarabande
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Holberg Suite (for piano solo), Op. 40; III Gavotte. Musette
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Holberg Suite (for piano solo), Op. 40; IV Air
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Holberg Suite (for piano solo), Op. 40; V Rigaudon
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Peer Gynt, Op. 23: No. 15, Prelude. Morning Mood
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The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": II. Largo
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5 Bagatelles, Op. 23a (Arr. L. Ashmore for Clarinet & Strings): No. 3, Carol. Andante semplice
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Cello Suite No. 1 in G Major, BWV 1007: IV. Sarabande
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2 Dialogues with Postscript (Version for Piano & String Orchestra): No. 3, Morning Serenade
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Woodland Sketches, Op. 51: No. 3: At an Old Trysting Place
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3 Elegische Stücke, Op. 106: I. No. 1, Elegie
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Symphony No. 3 in C Major, Op. 21: III. Allegretto Moderato
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Andersen Fairy Tales Suite: I. The Rose-Tree
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Le bourgeois gentilhomme: Chaconne des Scaramouches, Frivelins et Arlequins
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Consolations, S. 172 "6 Pensées poétiques": No. 3, Lento placido
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Sea-Murmurs (Arr. J. Heifetz for Cello & Piano)
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Prelude in D-Flat Major, VL 187 (Arr. J. Daunytė for Harp)
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No. 10, Pour lier et soutenir le chant dans la main droite. Andante espressivo
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Symphony No. 1 in E Major: II. Andantino
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5 Stücke im Volkston, Op. 102: No. 2, Langsam
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Leaves from a Child's Sketchbook: In the Meadows
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6 Quartetto concertans, No. 1 in B-Flat Major: II. Gratioso
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4 Short Pieces for Violin & Piano, H. 104: No. 2, Spring Song (Version for Cello & Piano)
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Lyric Pieces, Book 1, Op. 12: No. 1, Arietta
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Suite de danzas criollas, Op. 15: I. Adagietto pianissimo (Arr. S. Cohen)
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Cello Suite No. 4 in E-Flat Major, BWV 1010: I. Prélude (Arr. J. McFadden for Guitar)
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Orphée et Eurydice, Act II, Scene 2: Ballo
The Drottningholm Court Theatre Orchestra
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Carnival of the Animals, R. 125: XIII. The Swan
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3 Romanzen, Op. 22: No. 1, Andante molto (Arr. For cello and piano)
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Mélancolie, Op. 23 (Version for 2 Guitars)
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2 Pieces for Strings from Henry V: No. 2, Touch Her Soft Lips and Part
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Suite bergamasque, L. 75: III. Clair de lune (Featured in "Man on Fire")
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Viel Lärmen um Nichts, Op. 11, Act III Scene 1: Intermezzo
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Clarinet Concerto No. 1 in C Minor, Op. 26: II. Adagio
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The Macau Bride Ballet Suite, Op. 34: IV. The First Glance
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Triakontameron: No. 11, Alt-Wien (Arr. J. Heifetz for Violin & Piano)
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Valses poéticos: No. 3, Tempo de Vals lento (Arr. P. Breiner for guitar and orchestra)
Polish National Radio Symphony Orchestra
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Bagatelle No. 25 in A Minor, WoO 59 "Für Elise"
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Chanson de nuit et Chanson de matin, Op. 15: No. 2, Chanson de matin
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Petite suite de concert, Op. 77: III. Un Sonnet d'Amour
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The Mermaid Ballet Suite: III. Waterweed (Version for piano)
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Orquesta Juvenil Universitaria Eduardo Mata
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3 Latin American Sketches: No. 2, Paisaje Mexicano
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Stravinsky, Poulenc & Debussy: Works for Cello and Piano
Suite Italienne (Version for Cello & Piano): II. Serenata
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Beethoven/Haydn: Det Norske Blåseensemble - Christian Ihle Hadland - Eivind Aadland
Violin Sonata No. 1 in D Minor, Op. 75, R. 123: Ia. Allegro agitato
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6 Pieces for Violin & Piano, Op. 79 (Excerpts): No. 1, Souvenir
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6 Pieces for Violin & Piano, Op. 79 (Excerpts): No. 6, Berceuse
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Notturno e Danza for Violin & Piano: No. 1, Notturno
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Mozart_Danzi_Beethoven for Piano and Winds
Rebecca Clarke: Viola Sonata – Bridge: Cello Sonata
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6 Studies in English Folk Song: VI. Allegro vivace "As I Walked over London Bridge"
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Christian Ihle Hadland Plays Domenico Scarlatti
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Grieg: Cello Sonata - Grainger: La Scandinavie
Cello Sonata in A Minor, Op. 36: I. Allegro agitato
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Cello Sonata in A Minor, Op. 36: II. Andante molto tranquillo
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Cello Sonata in A Minor, Op. 36: III. Allegro
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Violin Sonata No. 3 in C Minor, Op. 45: II. Allegretto espressivo alla romanza (Version for Cello & Piano)
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La Scandinavie: I. Air et danse suédoise
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La Scandinavie: V. Air et finale sur des danses norvégiennes
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Strophic Songs, Op. 21, FS 42, Vol. 2: No. 1, Sænk kun dit hoved, du blomst (Arr. for Cello & Piano)
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Sinding: Music for Violin & Piano, Vol. 1
Til Eva - Selected Norwegian Songs - A Tribute to Eva Sars Nansen
Debussy: Cello Sonata in D Minor, L. 135: I. Prologue – Lent, sostenuto e molto risoluto
Poulenc: Cello Sonata, FP 143: III. Ballabile
BARTÓK Contrasts For Violin, Clarinet And Piano 1 - Verbunkos
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BARTÓK Contrasts For Violin, Clarinet And Piano 3 - Sebes
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Sinding, C.: Violin and Piano Music, Vol. 1
3 Elegiac Pieces, Op. 106: No. 2. Berceuse
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Sinding, C.: Violin and Piano Music, Vol. 2
Oboe Sonata, Op. 166: III. Molto allegro
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Oboe Sonata, Op. 166: II. Ad libitum - Allegretto - Ad libitum
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Scènes écossaises, Op. 138: I. Légende Pastorale
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Scènes ècossaises, Op. 138: II. Sérénade à Mabel
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Scènes écossaises, Op. 138: III. Marche des Highlanders
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Sonate, Op. 166 for Oboe and Piano: III. Molto allegro
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No. 2, Wachet auf, ruft uns die Stimme [After J.S. Bach's BWV 645]
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II. Adagio: Con espressione e ben legato
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XIII. Le Cygne (the Swan) [arr. For piano solo]
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No. 4, Songs My Mother Taught Me (Arr. P. Breiner for Piano)
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II. Tempo di minuetto con espressione e andante
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II. Air, "Air on a G String" (arr. P. Froeding for piano)
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Au Chateau et dans le Parc: III. Toto deguise en Suisse d'eglise
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d35e1425062179ca9097d3e3a56d72cf93fb4a7b01561e3d134a2f2656cb720. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191120812 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68834b5b19460fd0ce992f42bf5ba5c9f78f37c2bc0cc92b74061ef0cb40494. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192208102 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3c8e301be4ca05fb786f860204e2465b2f24e219bf79f2835ef486a2b0de59. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191515127 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e7bc4f5ea920e93cb233f3902dea391bd110a5e88bd23857b0647d11443777. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199746919 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f6319bf1d6710404c161a1575314bffcc88f09c97d14e7ae107e23fdf94bec. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP591800107 — a six-check JSON result.
Piano Sonata No. 16 in C Major, K. 545: I. Allegro
Piano Sonata No. 9 in D Major, K.311/284c: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d71f09a2c636b6bbb412b7e2f312ad8e359a12c95b4d0efeb423c7a537ba55b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOEHX2530010 — a six-check JSON result.