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 0xf8e4f3149e02a9e6d940e2190deed857fb8b12055e9b895d7299a5393c3a17dd. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccdd6490-c72b-4e07-97e3-fb89207f70f8.json and https://artists.proofprofile.net/proofs/artist/ccdd6490-c72b-4e07-97e3-fb89207f70f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach: Récital d'orgue (Aux grandes orgues de la Oude Kerk d'Amsterdam) [Mono Version]
The Well-Tempered Clavier, Book I, Prelude and Fugue No. 1 in C Major, BWV 846: Prelude
French Suite No. 1 in D Minor, BWV 812: Sarabande
Notebook for Anna Magdelena Bach, Book II: No. 4, Minuet in G Major - Formerly Attributed to Johann Sebastian Bach as BWV Anh. 114
Notebook for Anna Magdelena Bach, Book II: No. 16, March in D major - Formerly Attributed to Johann Sebastian Bach as BWV Anh. 122
French Suite No. 2 in C Minor, BWV 813: Allemande
Notebook for Anna Magdelena Bach, Book II: No. 7, Minuet in G Major, BWV Anh. 116
Little Organ Book: No. 41, Ich ruf’ zu dir, Herr Jesu Christ, BWV 639
Notebook for Anna Magdelena Bach, Book II: No. 20, So oft ich meine Tobackspfeife, BWV 515 (Aria) - Transcribed for Organ, Also Attributed to Gottfried Heinrich Bach
Notebook for Anna Magdelena Bach, Book II: No. 13, Gib dich zufrieden und sei stille, BWV 511 (Choral Setting)
Notebook for Anna Magdelena Bach, Book II: No. 25, Bist du bei mir (Aria) - Formerly Attributed to Johann Sebastian Bach as BWV 508
Herz und Mund und Tat und Leben, BWV 147: Jesus bleibet meine Freude (Chorale) - Transcribed for Organ
Ein Morgen, ein Mittag, ein Abend in Wien: Ouverture
Peer Gynt Suite No. 1, Op. 23 "Morgenstimmung"
Peer Gynt Suite No. 2, Op. 55 "Ingrid's Klage"
The Nutcracker Suite, Op. 71a: Dance Of The Reed Pipes
The Nutcracker Suite, Op. 71a: Dance of the Sugar-Plum Fairy
Serenade for Strings in C Major, Op. 48: Waltz
Zwei elegische Melodien, Op. 34: Letzter Frühling
6 Stücke, Op. 32: No. 3 Frühlingsrauschen
Improvisation "Die Winter is verganghen"
St. Matthew Passion, BWV 244: Part I: Kommt, ihr Tochter, helft mir klagen! (Chorus)
Bach, J.S.: St. Matthew Passion (Mengelberg) (1939)
St. Matthew Passion, BWV 244: Part I: Recitative: Da Jesus diese Rede vollendet hatte (Evangelist, Jesus)
St. Matthew Passion, BWV 244: Part I: Chorale: Herzliebster Jesu, was hast du verbrochen
St. Matthew Passion, BWV 244: Part I: Recitative: Da versammelten sich die Hohenpriester (Evangelist)
St. Matthew Passion, BWV 244: Part I: Chorus: Ja nicht auf das Fest
St. Matthew Passion, BWV 244: Part I: Recitative: Da nun Jesus war zu Bethanien (Evangelist)
St. Matthew Passion, BWV 244: Part I: Chorus: Wozu dienet dieser Unrat?
St. Matthew Passion, BWV 244: Part I: Recitative: Da das Jesus merkete, sprach er zu ihnen (Evangelist, Jesus)
St. Matthew Passion, BWV 244: Part I: Recitative: Du lieber Heiland du (Alto)
St. Matthew Passion, BWV 244: Part I: Aria: Buss' und Reu' (Alto)
St. Matthew Passion, BWV 244: Part I: Recitative: Da ging hin der Zwolfen einer (Evangelist, Judas)
St. Matthew Passion, BWV 244: Part I: Aria: Blute nur, du liebes Herz! (Soprano)
St. Matthew Passion, BWV 244: Part I: Recitative: Aber am ersten Tage der Sussen Brot' (Evangelist)
St. Matthew Passion, BWV 244: Part I: Chorus: Wo willst du, dass wir dir bereiten
St. Matthew Passion, BWV 244: Part I: Recitative: Er sprach: Gehet hin in die Stadt; Chorus: Herr, bin ich's? (Evangelist, Jesus)
St. Matthew Passion, BWV 244: Part I: Chorale: Ich bin's, ich sollte bussen
St. Matthew Passion, BWV 244: Part I: Recitative: Er antwortete und sprach: Der mit der Hand (Evangelist, Jesus, Judas)
St. Matthew Passion, BWV 244: Part I: Recitative: Wiewohl mein Herz in Tranen schwimmt (Soprano)
St. Matthew Passion, BWV 244: Part I: Aria: Ich will dir mein Herze schenken (Soprano)
St. Matthew Passion, BWV 244: Part I: Recitative: Und da sie den Lobgesang gesprochen hatten (Evangelist, Jesus)