1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92783e7a660f8ebeb2ef4895d97c0ab85f028d8a616ec503211f3b9e8138fd12. 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/b4b9d764-357e-43af-be57-66f7d530f927.json and https://artists.proofprofile.net/proofs/artist/b4b9d764-357e-43af-be57-66f7d530f927.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
Bagatelle in A Minor, Woo 59, "für Elise" - Bagatelle in B-flat Major, Woo 60 - Klavierstück in G Minor, Woo 61a, Hess 56 - Klavierstück in B Minor, Woo 61, Hess 62
Violin Concerto in D Major, Op. 61: Iii. Rondo: Allegro
Piano Sonata No. 14 in C-sharp Minor, Op. 27, No. 2, "moonlight": Iii. Presto
Septet in E-flat Major, Op. 20: V. Scherzo: Allegro molto e vivace
Symphony No. 7 in A Major, Op. 92: Iv. Allegro con brio
Violin Sonata No. 5 in F Major, Op. 24, "spring": I. Allegro
Piano Concerto No. 5 in E-flat Major, Op. 73, "emperor": Iii. Rondo: Allegro, ma non troppo
String Quartet No. 6 in B-flat Major, Op. 18, No. 6: I. Allegro con brio
Rondo à Capriccio in G Major, Op. 129, "rage over a Lost Penny": Rondo à Capriccio in G Major, Op. 129, "rage over a Lost Penny"
Symphony No. 6 in F Major, Op. 68, "pastoral": Iii. Merry Gathering of Country Folk: Allegro
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": I. Allegro (Featured in "Nikita")
String Quartet No. 17 in B-Flat Major, K. 458, "Hunt": I. Allegro vivace assai
Flute Concerto No. 2 in D Major, K. 314: I. Allegro aperto
Violin Sonata No. 22 in A Major, K. 305: I. Allegro di molto
Piano Concerto No. 23 in A Major, K. 488: III. Allegro assai (Excerpt)
Symphony No. 40 in G Minor, K. 550: I. Allegro molto
Horn Concerto No. 4 in E-Flat Major, K. 495: III. Rondo. Allegro vivace
Amadeus Chamber Orchestra of Polish Radio
Serenade No. 7 in D Major, K. 250, "haffner": Iv. Rondo: Allegro
Piano Sonata No. 11 in A Major, K. 331: III. Rondo alla turca. Allegretto
Serenade No. 13 in G Major, K. 525, "Eine kleine Nachtmusik": Iv. Rondo: Allegro
Piano Sonata No. 16 in C Major, K. 545 "Sonata facile": I. Allegro
Ein musikalischer Spaß, Op. 93, K. 522: IV. Presto
Don Giovanni, K. 527, Act I Scene 15: Recitativo. Io deggio ad ogni patto (Leporello, Don Giovanni)
Don Giovanni, K. 527, Act I Scene 1: Introduzione. Notte e giorno faticar (Leporello, Donna Anna, Don Giovanni, Il Commendatore)
Don Giovanni, K. 527, Don Giovanni, Act I: Aria. Fin ch'han dal vino
Don Giovanni, K. 527, Act I Scene 2: Recitativo. Leporello, ove sei? (Don Giovanni, Leporello)
Don Giovanni, K. 527, Act I Scene 16: Recitativo. Masetto: Senti un po'! (Zerlina, Masetto)
Don Giovanni, K. 527, Act I Scene 3: Recitativo. Ah del padre in periglio (Donna Anna, Don Ottavio)
Don Giovanni, K. 527, Act I: Aria. Batti, batti, o bel Masetto
Don Giovanni, K. 527, Act I Scene 3: Recitativo accompagnato e Duetto. Ma qual mai s'offre, oh Dei (Donna Anna, Don Ottavio)
Don Giovanni, K. 527, Act I Scene 16: Recitativo. Guarda un po' come seppe (Masetto, Don Giovanni, Zerlina)
Don Giovanni, K. 527, Act I Scene 3: Duetto. Fuggi, crudele, fuggi! (Donna Anna, Don Ottavio)
Don Giovanni, K. 527, Act I Scene 16: Finale. Presto, presto pria ch'ei venga - Scene 17: Su, svegliatevi, da bravi! (Masetto, Zerlina, Don Giovanni, Chorus)
Don Giovanni, K. 527, Act I Scene 4: Recitativo. Orsu, spicciati presto (Don Giovanni, Leporello)
Don Giovanni, K. 527, Act I Scene 18: Tra quest arbori celata (Don Giovanni, Zerlina, Masetto)
Don Giovanni, K. 527, Act I Scene 5: Aria. Ah chi mi dice mai (Donna Elvira, Don Giovanni, Leporello)
Don Giovanni, K. 527, Act I Scene 19: Bisogna aver coraggio (Donna Elvira, Don Ottavio, Donna Anna, Leporello, Don Giovanni)
Don Giovanni, K. 527, Act I Scene 5: Recitativo. Chi e la? Stelle! Che vedo! (Donna Elvira, Don Giovanni, Leporello)
Don Giovanni, K. 527, Act I: Protegga il giusto cielo
Don Giovanni, K. 527, Act I: Aria. Madamina, il catalogo è questo
Don Giovanni, K. 527, Act I Scene 20: Riposate, vezzose ragazze (Don Giovanni, Leporello, Masetto, Zerlina)
Don Giovanni, K. 527, Act I Scene 20: Venite pur avanti (Leporello, Don Giovanni, Donna Anna, Donna Elvira, Don Ottavio, Masetto, Zerlina)
Don Giovanni, K. 527, Act I Scene 6: Recitativo. In questa forma dunque (Donna Elvira)
Don Giovanni, K. 527, Act I Scene 20: Ecco il birbo
Don Giovanni, K. 527, Act I Scene 7: Coro: Giovinette che fate all'amore (Zerlina, Masetto, Chorus)
Don Giovanni, K. 527, Act I Scene 20: Trema, trema o scellerato! (Donna Anna, Donna Elvira, Zerlina, Don Ottavio, Masetto, Don Giovanni, Leporello)
Don Giovanni, K. 527, Act I Scene 8: Recitativo. Manco male e partita (Don Giovanni, Leporello, Zerlina, Masetto)
Don Giovanni, K. 527, Act II Scene 1: Duetto. Eh, via, buffone, non mi seccar (Don Giovanni, Leporello)
Don Giovanni, K. 527, Act I Scene 8: Aria. Ho capito, signor si (Masetto)
Don Giovanni, K. 527, Act II Scene 1: Recitativo. Leporello! Signore? (Don Giovanni, Leporello)
Don Giovanni, K. 527, Act I Scene 9: Recitativo. Alfin siam liberati (Don Giovanni, Zerlina)
Don Giovanni, K. 527, Act II: Terzetto. Ah taci ingiusto core
Don Giovanni, K. 527, Act I: La ci darem la mano
Don Giovanni, K. 527, Act II Scene 2: Recitativo. Amico, che ti par? (Don Giovanni, Leporello)
Don Giovanni, K. 527, Act I Scene 10: Recitativo. Fermati scellerato (Donna Elvira, Zerlina, Don Giovanni)
Don Giovanni, K. 527, Act II Scene 3: Recitativo. Eccomi a voi! (Donna Elvira, Don Giovanni, Leporello)
Don Giovanni, K. 527, Act I: Aria. Ah! Fuggi il traditor!
Don Giovanni, K. 527: Deh! Vieni alla finestra
Don Giovanni, K. 527, Act I Scene 11: Recitativo. Mi par ch'oggi il demonio si diverta (Don Giovanni, Don Ottavio, Donna Anna)
Don Giovanni, K. 527, Act II Scene 3: Recitativo. V'e gente alla finestra (Don Giovanni)
Don Giovanni, K. 527, Act I: Quartetto. Non ti fidar, o misera
Don Giovanni, K. 527, Act II Scene 4: Recitativo. Non ci stanchiamo - Aria. Meta di voi qua vadano (Masetto, Don Giovanni)
Don Giovanni, K. 527, Act I Scene 12: Recitativo. Povera sventurata! (Don Giovanni)
Don Giovanni, K. 527, Act II Scene 5: Recitativo. Zitto! Lascia ch'io senta: Ottimamente (Don Giovanni, Masetto)
Don Giovanni, K. 527, Act I Scene 13: Recitativo accompagnato ed Aria. Don Ottavio, son morta! (Donna Anna, Don Ottavio)
Don Giovanni, K. 527, Act II Scene 6: Recitativo. Ahi ahi! La testa mia (Masetto, Zerlina)
Don Giovanni, K. 527, Act I: Aria. Or sai chi l'onore
Don Giovanni, K. 527, Act II: Aria. Vedrai, carino
Don Giovanni, K. 527, Act I Scene 14: Recitativo. Come mai creder deggio (Don Giovanni)
Don Giovanni, K. 527, Act II Scene 7: Recitativo. Di molte faci il lume (Leporello, Donna Elvira)
Don Giovanni, K. 527, Act II Scene 7: Sestetto: Sola, sola in buio loco - Scene 8: Ferma (Donna Elvira, Leporello, Don Ottavio, Donna Anna, Zerlina, Masetto)
The 4 Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": II. Largo
Concerto in D Major, RV 90, "Il gardellino": Ii. Largo
Concerto for 2 Oboes in C Major, RV 534: II. Largo
Violin Concerto in E Major, Rv 267: Ii. Largo
Cello Concerto in G Major, RV 414: II. Largo
The Four Seasons, Violin Concerto in E Major, Op. 8 No. 1, RV 269 "Spring": II. Largo
Bassoon Concerto in F Major, RV 491: Ii. Largo
Violin Concerto in B-Flat Major, Op. 4, No. 1, RV 383a: II. Largo
Sonata No. 6 in G Minor, Op. 13, RV 58, "Il pastor fido": III. Largo
Cello Concerto in C Minor, RV 401: Ii. Adagio
Concerto Grosso in G Minor, Op. 3, No. 2, RV 578: II. Larghetto
Violin Concerto in E-Flat Major, Op. 8, No. 5, RV 253, "La tempesta di mare": Ii. Largo
Flautino Concerto in C Major, RV 443: Ii. Largo
The Four Seasons, Violin Concerto in G Minor, Op. 8 No. 2, RV 315 "Summer": II. Adagio
Bassoon Concerto in C Major, RV 477: Ii. Largo
Violin Concerto in G Minor, Op. 4, No. 6, RV 316a: II. Largo
Oboe Concerto in C Major, RV 450: II. Larghetto
Concerto for 2 Violins in A Minor, Op. 3, No. 8, Rv 522: Ii. Larghetto e spiritoso
Concerto Grosso in D Minor, Op. 3, No. 11, RV 565: Ii. Largo e spiccato
The Four Seasons, Violin Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": II. Adagio molto
Concerto for Strings in G Major, RV 151 "Alla rustica": II. Adagio
Oboe Concerto in C Major, RV 452: II. Adagio
Violin Concerto in G Major, Op. 4, No. 12, RV 298: II. Largo
Cello Concerto in D Minor, RV 405: II. Adagio
Cello Concerto in D Minor, RV 405: III. Allegro
Cello Concerto in G Minor, RV 417: I. Allegro
Cello Concerto in G Minor, RV 417: II. Andante
Cello Concerto in G Minor, RV 417: III. Allegro
Cello Concerto in D Major, RV 403: I. Allegro
Cello Concerto in D Major, RV 403: II. —
Cello Concerto in D Major, RV 403: III. Allegro
Cello Concerto in F Major, RV 410: I. Allegro
Cello Concerto in F Major, RV 410: II. Adagio, solo a piacimento
Cello Concerto in F Major, RV 410: III. —
Cello Concerto in A Minor, RV 420: I. Andante
Cello Concerto in A Minor, RV 420: II. Adagio
Cello Concerto in A Minor, RV 420: III. Allegro
Cello Concerto in G Major, RV 414: I. Allegro molto
Cello Concerto in G Major, RV 414: II. Andante
Cello Concerto in G Major, RV 414: III. Presto
Cello Concerto in G Minor, RV 416: I. Allegro
Cello Concerto in G Minor, RV 416: II. Adagio (Largo)
Cello Concerto in G Minor, RV 416: III. Allegro
Cello Concerto in A Minor, RV 418: I. Allegro
Cello Concerto in A Minor, RV 418: II. —
Cello Concerto in A Minor, RV 418: III. Allegro
Cello Concerto in C Minor, RV 401: I. Allegro non molto
Cello Concerto in C Minor, RV 401: II. Adagio
Cello Concerto in C Minor, RV 401: III. Allegro ma non molto
Cello Concerto in G Major, RV 413: I. Allegro
Cello Concerto in G Major, RV 413: II. Largo
Cello Concerto in G Major, RV 413: III. Allegro
Cello Concerto in G Minor: I. Allegro moderato
Cello Concerto in G Minor: III. Allegro non tanto
Concerto in A Major, D-WD 654: I. Allegro
Concerto in A Major, D-WD 654: II. Largo e cantabile
Concerto in A Major, D-WD 654: III. Presto
Concerto grosso in D Major, D-WD 538, After Sonata, Op. 5 No. 1 by Corelli: I. Grave - Allegro - Adagio - Grave - Allegro - Adagio
Concerto grosso in D Major, D-WD 538, After Sonata, Op. 5 No. 1 by Corelli: II. Allegro
Concerto grosso in D Major, D-WD 538, After Sonata, Op. 5 No. 1 by Corelli: III. Allegro
Concerto grosso in D Major, D-WD 538, After Sonata, Op. 5 No. 1 by Corelli: IV. Adagio
Concerto grosso in D Major, D-WD 538, After Sonata, Op. 5 No. 1 by Corelli: V. Allegro
Concerto in D Minor, D-WD 657: I. Non tanto allegro
Concerto in D Minor, D-WD 657: II. Adagio
Concerto in D Minor, D-WD 657: III. Fuga. Alla breve
Concerto grosso in C Major, D-WD 539, After Sonata, Op. 5 No. 3 by Corelli: I. Adagio
Concerto grosso in C Major, D-WD 539, After Sonata, Op. 5 No. 3 by Corelli: II. Allegro
Volodimiro, Overture: Voldomiro: Overture
Symphony No. 9 In D Minor, Op. 125, "Choral": IV. Finale: Presto
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1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5604ae7ecf13312685a6bd789b045b766ce3950aed68068e7a702943910c6d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/47qahzQI2ZtxJWyYFEnCCQ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/47qahzQI2ZtxJWyYFEnCCQ.
Symphony No. 9 In D Minor, Op. 125, "Choral": I. Allegro Ma Non Troppo, Un Poco Maestoso
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa59f50f485b7383dce80fec6593dec6ed28126843eb4c67186ee0f4375b7546. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/30dXCur7kOl0rF4IktevI1.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/30dXCur7kOl0rF4IktevI1.
Symphony No. 9 In D Minor, Op. 125, "Choral": III. Adagio Molto E Cantabile - Andante Moderato
Symphony No. 9 In D Minor, Op. 125, "Choral": II. Molto Vivace
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889e112f056df6ded923444a464d44833eca10ab6a71a8985d59f93ad7bbc776. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5ix4mmeks2IUgyqJyVsAhe.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5ix4mmeks2IUgyqJyVsAhe.
Bassoon Concerto in C Major, RV 476: I. Allegro
Vivaldi: Bassoon Concertos (Complete), Vol. 1
Bassoon Concerto in A Minor, RV 498: I. Allegro
Bassoon Concerto in C Major, RV 476: II. Largo
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772de5bb4694cc46b6089904ffae175dbaefe2c11e095da1df38b75334a5dd98. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2CJjNsSQy6SH3LNSIw9xvw.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2CJjNsSQy6SH3LNSIw9xvw.
Bassoon Concerto in C Major, RV 476: III. Allegro molto
Bassoon Concerto in F Major, RV 487: II. Largo
Bassoon Concerto in A Minor, RV 498: II. Larghetto
Bassoon Concerto in C Minor, RV 480: I. Allegro
Don Giovanni, K. 527, Act II: Don Giovanni, a cenar teco
Bassoon Concerto in F Major, RV 487: I. Allegro
Bassoon Concerto in F Major, RV 487: III. Allegro
Bassoon Concerto in C Major, RV 471: I. Allegro molto
Bassoon Concerto in C Major, RV 471: II. Larghetto
Bassoon Concerto in C Major, RV 471: III. Allegro
Bassoon Concerto in A Minor, RV 498: III. Allegro