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 0xfabf2354cd146948098f3433a253e78ef2fae92b0a09d39d1f444f1f2bff6853. 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/ab55b55e-93f0-48ea-8987-0aeabaae909b.json and https://artists.proofprofile.net/proofs/artist/ab55b55e-93f0-48ea-8987-0aeabaae909b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Symphony No. 5 in C-Sharp Minor: IV. Adagietto: Sehr langsam
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 0x58a52c467715f95aa87e02794b1a1032011fed99cc1b55393cbf071cdebc0cc0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKI190589604 — a six-check JSON result.
Die Zauberflote (The Magic Flute), K. 620, Act II: Der Holle Rache… (Queen of the Night)
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Peer Gynt Suite No. 1, Op. 46: IV. In the Hall of the Mountain King
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Orchestral Suite No. 2 in B Minor, BWV 1067: VII. Badinerie
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The 4 Seasons: Violin Concerto in E Major, Op. 8, No. 1, RV 269, "La primavera" (Spring): The Four Seasons: Violin Concerto in E Major, Op. 8, No. 1, RV 269, "Spring": I. Allegro
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Swan Lake, Op. 20, Act II No. 10: Scene, "Swan Theme"
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Violin Partita No. 3 in E Major, BWV 1006: I. Preludio
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An der schonen, blauen Donau (The Beautiful Blue Danube), Op. 314
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Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
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Liebesträume, S. 541: 3 Liebestraume, S541/R211: No. 3: Nocturne in A-Flat Major
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Bagatelle in A Minor, WoO 59, "Fur Elise"
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Brandenburg Concerto No. 3 in G Major, BWV 1048: III. Allegro
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Klavierkonzert Nr. 21 C-Dur, K. 467, "Elvira Madigan": 2. Andante (Elvira Madigan): Piano Concerto No. 21 in C Major, "Elvira Madigan": II. Andante
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Mandolin Concerto in C Major, RV 425: I. Allegro
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Symphony No. 41 in C Major, K. 551, "Jupiter": IV. Molto allegro
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7816ff240801025909a8efdd703bcdc4d3647afe27aa2423636b20470dabcb2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/HKI199202605 — a six-check JSON result.
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Die Walkure, Act III: Ride of the Valkyries
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Toccata and Fugue in D Minor, BWV 565: Toccata
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Symphony No. 94 in G Major, Hob.I:94, "The Surprise": II. Andante
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1812 Festival Overture, Op. 49: 1812 Overture, Op. 49
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Nocturne No. 2 in E-Flat Major, Op. 9, No. 2
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Requiem in D Minor, K. 626: Sequence: V. Confutatis maledictis - Sequence: VI. Lacrimosa dies illa
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The Planets, Op. 32: IV. Jupiter, the Bringer of Jollity
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Music for the Royal Fireworks, HWV 351: IV. Le rejouissance
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Symphony No. 9 in E Minor, Op. 95, "From the New World": II. Largo
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Piano Sonata No. 11 in A Major, K. 331: III. Rondo alla turca: Allegretto
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3 Gymnopedies: No. 1. Lent et douloureux
Orchestre Symphonique et Lyrique de Nancy
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Serenade No. 13 in G Major, K. 525, "Eine kleine Nachtmusik": I. Allegro
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Piano Concerto in A Minor, Op. 16: I. Allegro moderato
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Water Music: Suite No. 1 in F Major, HWV 348: VI. Air
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The Well-Tempered Clavier, Book I: Well-Tempered Clavier, Book I: Prelude and Fugue No. 1 in C Major, BWV 846
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The 4 Seasons: Violin Concerto in F Minor, Op. 8, No. 4, RV 297, "L'inverno" (Winter): II. Largo
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Rinaldo, HWV 7a: Lascia ch'io pianga (Let me lament)
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2, "Moonlight": I. Adagio sostenuto
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Suite bergamasque: III. Clair de lune (orch. A. Caplet)
Rheinland-Pfalz State Philharmonic Orchestra
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The Nutcracker Suite, Op. 71a: III. Dance of the Sugar Plum Fairies
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Also sprach Zarathustra, Op. 30, TrV 176: I. Einleitung
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35edb3f1b4ae94b5582455b7b14e5f6b5c9dff0dede0065882612849f0bb0ddb. 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/HKI190423201 — a six-check JSON result.
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Gianni Schicchi: O mio babbino caro (Lauretta)
Belgian Radio and Television Philharmonic Orchestra
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Serse (Xerxes), HWV 40, Act I: Ombra mai fu: Largo (Serse)
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Nabucco, Act III: Va, pensiero, "Chorus of Hebrew Slaves"
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Prélude à l'après-midi d'un faune, L. 86: Prelude a l'apres-midi d'un faune
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Le nozze di Figaro, K. 492, Act I: Overture
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La crème de la crème: La musique classique
Die Zauberflöte, K. 620: Der Hölle Rache
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Peer Gynt, Op. 23: In the Hall of the Mountain King
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