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 0x57ba845d5b700bfd5de2fb6c0086cc4cb3b47a64ac9749780be43c39e6d373b5. 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/9f768f30-0ab1-4295-ae8f-c3c9e5a6c70f.json and https://artists.proofprofile.net/proofs/artist/9f768f30-0ab1-4295-ae8f-c3c9e5a6c70f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x24ce0b50eff6eb7762a604d88bee62da1c6152fe33e700fdfba8c166e56c9f67. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/HKI199707601.
The Crown of India, Op. 66: March of the Mogul Emperors
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The Planets, Op. 32: I. Mars, the Bringer of War
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Das Rheingold, Scene 4: Entry of the Gods into Valhalla
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Die Walkure, Act III: Ride of the Valkyries
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The Firebird Suite (1919 version): Firebird Suite: King Kastchei's Infernal Dance (1919 version)
Belgian Radio and Television Philharmonic Orchestra
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Pini di Roma (Pines of Rome): IV. Pines of the Appian Way
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Feste romane (Roman Festivals): IV. Epiphany
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Romeo and Juliet, Op. 64: Montagues and Capulets (Dance of the Knights)
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Sinfonie Nr. 3 c-Moll, Op. 78, "Orgelsinfonie": 2. Maestoso - Allegro - Più allegro - Molto allegro - Pesante (Ein Schweinchen names Babe): Symphony No. 3 in C Minor, Op. 78, "Organ": II. All
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Le sacre du printemps (The Rite of Spring): Part 2: The Sacrifice (excerpt)
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The Red Poppy, Op. 70: Russian Sailors' Dance
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Danzas fantasticas (Fantastic Dances), Op. 22: III. Orgia
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The Philadelphia Virtuosi Chamber Orchestra
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Symphony No. 9 in D Minor, WAB 109: II. Scherzo: Bewegt, lebhaft (original 1894 version, ed. L. Nowak)
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Gotterdammerung, Act III: Siegfried's Death and Funeral March
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Bilder einer Ausstellung: X. The Great Gate of Kiev
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1812 Festival Overture, Op. 49: 1812 Overture, Op. 49: Finale
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101 Classics - The Best Loved Classical Melodies
An der schonen, blauen Donau (The Beautiful Blue Danube), Op. 314
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Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso (Opening)
Polish National Radio Symphony Orchestra
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Emperor Waltz, Op. 437: Kaiser Walzer (Emperor Waltz), Op. 437
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The Danube Waves: Valurile Dunarii (The Danube Waves)
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Bagatelle in A Minor, WoO 59, "Fur Elise"
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Serenade for Strings in C Major, Op. 48: II. Walzer
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Les Patineurs, Op. 183, "The Skater's Waltz"
Slovak State Philharmonic Orchestra, Kosice
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The Nutcracker Suite, Op. 71a: VIII. Waltz of the Flowers
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Piano Sonata No. 11 in A Major, K. 331: III. Alla Turca: Allegretto
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The Essentials: Greatest Classics, Vol. 1
Serenade No. 13 in G Major, K. 525, "Eine kleine Nachtmusik": I. Allegro
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Piano Concerto No. 21 in C Major, K. 467, "Elvira Madigan": II. Andante
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Symphony No. 4 in A Major, Op. 90, "Italian": I. Allegro vivace
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Piano Sonata No. 11 in A Major, K. 331: III. Alla turca: Allegretto (arr. for orchestra)
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The Four Seasons, Violin Concerto in E Major, Op. 8 No. 1, RV 269 "Spring": The 4 Seasons: Violin Concerto in E Major, Op. 8, No. 1, RV 269, "La primavera" (Spring): I. Allegro
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Also sprach Zarathustra, Op. 30, TrV 176: I. Also sprach Zarathustra
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Peer Gynt Suite No. 1, Op. 46: IV. I Dovregubbens hall (In the Hall of the Mountain King)
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2, "Moonlight": I. Adagio sostenuto
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Liebestraume, S541/R211: No. 3. Nocturne in A-Flat Major
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Thaïs: Thais, Act II: Meditation (version for violin and piano)
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Suite for Jazz Orchestra No. 2: Jazz Suite No. 2: VI. Waltz No. 2
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Serenade for Strings in E Major, Op. 22: II. Tempo di Valse
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Skona Grona Dagar (Beautiful Green Days)
Concerto for Oboe and Violin in C Minor, BWV 1060: II. Adagio
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Herz und Mund und Tat und Leben, BWV 147: Jesu bleibet meine Freude (Jesu Joy of Man's Desiring) (arr. for organ)
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Concerto for 2 Violins in D Minor, BWV 1043: II. Largo ma non tanto
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Canon and Gigue in D Major: Canon in D Major
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Antiche danze ed arie per liuto (Ancient Airs and Dances), Suite No. 3, P. 172: III. Siciliana
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24 Caprices, Op. 1: Caprice No. 24 in A Minor, Op. 1, No. 24
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Thais: Thais, Act II: Meditation (Ladies in Lavender)
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Peer Gynt: Suite No. 2, Op. 55: IV. Solveigs sang (Solveig's Song)
CSSR State Philharmonic Orchestra, Kosice
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Violin Concerto No. 3 in G Major, K. 216: II. Adagio
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Cello Concerto No. 1 in C Major, Hob.VIIb:1: II. Adagio
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The Gadfly Suite, Op. 97a: VIII. Romance
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Der Zauberlehrling (The Sorcerer's Apprentice)
Klassik die man kennen muss! Die größten Werke der Klassischen Musik
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Romance No. 2 in F Major, Op. 50: Romance No. 2 in F Major, Op. 50
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