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 0x22a5f67db693d580c5739d216e52c079b8c5a66df09151c750db56d40ce0b308. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0af83d78-f484-4078-8ce9-abe3c57cef84.json and https://artists.proofprofile.net/proofs/artist/0af83d78-f484-4078-8ce9-abe3c57cef84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Viola Concerto: I. Andante comodo - con spirito
Viola Concerto: II. Vivo, con molto preciso
Suite for Viola: Group 1, Christmas Dance
Suite for Viola: Group 3, Polka melancholique
Bloch: Suite for Viola and Orchestra - Baal Shem - Suite hebraïque
Baal Shem: No. 1, Vidui (Contrition) [arr. Hong-Mei Xiao for viola and orchestra]
Baal Shem: No. 2, Nigun (Improvisation) [arr. Hong-Mei Xiao for viola and orchestra]
Baal Shem: No. 3, Simchas Torah (Rejoicing in the Holy Scriptures) [arr. Hong-Mei Xiao for viola and orchestra]
Suite for Viola and Orchestra: I. Lento - Allegro - Moderato
Suite for Viola and Orchestra: II. Allegro ironico
Suite for Viola and Orchestra: III. Lento
Suite for Viola and Orchestra: IV. Molto vivo
Suite hébraïque: II. Processional: Andante con moto
Suite hébraïque: III. Affirmation: Maestoso
Bartok: Viola Concerto / 2 Pictures, Bb 59
Viola Concerto (1995 version edited by P. Bartok and P. Neubauer): I. Allegro moderato
Viola Concerto (1995 version edited by P. Bartok and P. Neubauer): II. Lento
Viola Concerto (1995 version edited by P. Bartok and P. Neubauer): III. (Finale) Allegretto
2 Kep (2 Pictures), Op. 10, BB 59: In Full Flower: Poco adagio
2 Kep (2 Pictures), Op. 10, BB 59: Village Dance: Allegro
Viola Concerto, BB 128 (completed by Tibor Serly, 1949): I. Moderato
Viola Concerto, BB 128 (completed by Tibor Serly, 1949): II. Adagio religioso
Viola Concerto, BB 128 (completed by Tibor Serly, 1949): III. Allegro vivace
Discover The Classics, Vol. 3: The Concerto
Concerto Grosso in G Minor, Op. 6, No. 8, "Christmas Concerto": V. Allegro
Concerto for Violin, Piano and Strings in D Minor: III. Allegro molto
Piano Concerto No. 1 in E-Flat Major, S124/R455: Allegro maestoso
Oboe Concerto in C Major, Op. 9, No. 5: III. Allegro
Violin Concerto in D Major, Op. 35: III. Finale: Allegro vivacissimo
Violin Concerto in C Major, Op. 8, No. 6, RV 180, "Il Piacere", III. Allegro
Double Concerto for Violin and Cello in A Minor, Op. 102: II. Andante
Organ Concerto in F Major, Op. 4, No. 4: I. Allegro
Piano Concerto No. 1 in F-Sharp Minor, Op. 1: II. Andante
Polish National Radio Symphony Orchestra
Brandenburg Concerto No. 2 in F Major, BWV 1047: III. Allegro assai
Violin Concerto in D Major, Op. 35: I. Moderato mobile
Concerto for 2 Harpsichords in C Minor, BWV 1060: III. Allegro
Viola Concerto, Sz 120, BB 128: III. FInale: Allegretto
Cello Concerto in A Major, Wq. 172, H. 439: III. Allegro assai
Clarinet Concerto in C Minor, Op. 31: I. Allegro vigoroso
Trumpet Concerto in E-Flat Major, Hob.VIIe:1: III. Finale: Allegro
Guitar Concerto: III. Allegretto non troppo
Piano Concerto No. 23 in A Major, K. 488: I. Allegro
Cello Concerto No. 1 in E-Flat Major, Op. 107: I. Allegretto
Klarinettenkonzert A-Dur, K. 622: 2. Adagio (Jenseits von Afrika): Clarinet Concerto in A Major, K. 622: II. Adagio
Horn Concerto No. 4 in E-Flat Major, K. 495: III. Rondo: Allegro vivace
The Piano Concerto: Piano Concerto: IV. The Release
Triple Concerto for Violin, Cello and Piano in C Major, Op. 56: Concerto for Violin, Cello and Piano in C Major, Op. 56, "Triple Concerto": III. Rondo alla polacca
Klavierkonzert Nr. 5 Es-Dur, Op. 73: Piano Concerto No. 5 in E-Flat Major, Op. 73, "Emperor": III. Rondo: Allegro
Promenade (arr. S. Berkowitz for clarinet and orchestra)
Le siege de Corinthe, Act I: Recitatif et Air: Qu'a ma voix - Chef d'un peuple indomptable (Mahomet, Chorus)
Sacred Concerto No. 27, "Hlasom moim ko Hospodu vozzvakh" (With my voice unto the Lord have I cried): I. Adagio
Baal Shem: No. 3. Simchas Torah (Rejoicing in the Holy Scriptures) (arr. Hong-Mei Xiao for viola and orchestra)
Symphony No. 2, "The Big Apple": Interlude: Times Square Cadenza
String Quartet No. 1 in G Major: IV. Allegro
3 Pequenas piezas: No. 2. Por caminos de Santiago
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 → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2a6c8e5200e840585466e6775ebad09d7ba573dbf9c993f0f76594b36c364f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKI191250808.
Peches de vieillesse, Vol. 12: Quelques riens pour album: No. 6. Un rien: Andante maestoso - Allegro brillante
Pictures at an Exhibition: II. Old Castle
Monologe, Op. 63: Nos. 7-12: No. 9. Toccata
L'Arlesienne Suite, Nr. 1: L'arlesienne Suite No. 1: II. Menuet
Viola Concerto in G Major, TWV 51:G9: II. Allegro
Viola Concerto, Sz. 120: II. Adagio religioso (Completed by T. Serly)
Chromatic Fantasia & Fugue, BWV 903 (Transcr. Z. Kodály for Viola)
Viola Sonata in B-Flat Major, Op. 36: II. Barcarolla
Harold en Italie, Op. 16, H. 68: III. Sérénade d’un montagnard des Abruzzes à sa maîtresse
Viola Sonata in F Major, Op. 11 No. 4: I. Fantasie
Duo for Viola & Cello in E-Flat Major, WoO 32 "Eyeglass Duo": II. Minuet
Märchenbilder, Op. 113: No. 1, Nicht schnell
Viola Concerto in D Major, Op. 1: II. Andante moderato
Clarinet Sonata in F Minor, Op. 120 No. 1 (Version for Viola & Piano): IV. Vivace
Romeo and Juliet, Op. 64: Act I: Introduction (Arr. V. Borisovsky for viola and piano)
Sinfonia concertante in E-Flat Major, K. 364: III. Presto
Viola Concerto, C. 22 (1961 Version): II. Vivo, con molto preciso
Roman nepi tancok (Romanian Folk Dances), BB 68: Six Romanian Folkdances, Sz. 56
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bf4a8a64e05cd01008b341b0022061d300e6c95a93d454b3df204a5678f5c5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI199294915.
Violin Concerto No. 2, BB 117: II. Andante tranquillo
Concerto for Orchestra, BB 123: IV. Intermezzo interrotto: Allegretto
Belgian Radio and Television Philharmonic Orchestra
Concerto for Orchestra, BB 123: V. Finale: Presto
Piano Concerto No. 3, BB 127: II. Adagio religioso
Contrasts, BB 116: I. Verbunkos: Moderato, ben ritmato
Viola Concerto, BB 128 (completed by Tibor Serly, 1949): II. Lento
Viola Concerto, BB 128 (completed by Tibor Serly, 1949): III. (Finale): Allegretto
44 Duos for 2 Violins, BB 104, Vol. 4: Prelude and Canon
Music for Strings, Percussion and Celesta, BB 114: IV. Allegro molto
Viola Concerto (1995 version edited by P. Bartok and P. Neubauer): Allegro moderato
Viola Concerto (1995 version edited by P. Bartok and P. Neubauer): Lento
Viola Concerto (1995 version edited by P. Bartok and P. Neubauer): (Finale) Allegretto
Viola Concerto, BB 128 (completed by Tibor Serly, 1949): Moderato
Viola Concerto, BB 128 (completed by Tibor Serly, 1949): Adagio religioso
Viola Concerto, BB 128 (completed by Tibor Serly, 1949): Allegro vivace
Horne, W.: Viola Sonata / Songs for Ellen / Psalm in April / Intermezzo
Songs for Ellen: No. 1. The Angel Gabriel
Songs for Ellen: No. 3. The Nightingale's Song
Psalm in April: No. 1. The Lord is my light and my salvation
Psalm in April: No. 2. When evildoers came upon me
Psalm in April: No. 3. One thing have I asked of the Lord
Psalm in April: No. 5. Hearken to my voice, O Lord, when I call