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 0x5a96bb92332590329d40ee1f845daf108466d602316082256d56a0495b800488. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16205e68-d481-4c02-8683-551524e1d368.json and https://artists.proofprofile.net/proofs/artist/16205e68-d481-4c02-8683-551524e1d368.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trois Nouvelles Etudes in F Minor, No. 1
Trois Nouvelles Etudes in D-Flat MajorNo. 3
Trois Nouvelles Etudes in A-Flat Major No. 2
Sonata in B Minor, Op. 58: I. Allegro Maestoso
Sonatas in A Major, K 331: I. Andante Grazioso
Sonatas in A Major, K 331: II. Alla Turca Menuetto
Sonatas in A Major, K 331: III. Alla Turca: Allgretto
Sonata in F Major, K 332: III. Allegro Assai
Sonata in A Minor, K 310: I. Allegro Maestoso
Sonata in A Minor, K 310: II. Andante Cantabile Con Espressione
Piano Recital: Zayas, Juana - Cervantes / Caturla / Hernandez, G. / Lecuona, E.
Por que, eh? (Why, Huh?): Porque eh? (Why? Eh?)
Se fue y no velve mas (Gone, never to return)
Cortesana (Courtesan): La cortesana (Lady in waiting)
Cri-Cri (Rustling of Petticoats): Cri-cri
Cubanas for piano: No. 1. Toque de clave
Cubanas for piano: No. 4. Preludio en son
Danzas Afro-Cubanas: La conga de media noche
Danzas Afro-Cubanas: … Y la Negra bailaba!
Danzas Afro-Cubanas: Danza de los Nanigos
Los tres golpes (the 3 Blows): Los tres golpes [Three knocks]
Por que, eh? (Why, Huh?): Porque eh? [Why? Eh?]
Se fue y no vuelve más (Gone Never to Return): Se fue y no velve mas [Gone, never to return]
Mensaje (Message): Mensaje [the message]
Siempre si (Yes Forever): Siempre si [Forever yes]
Un recuerdo (a Memory): Un recuerdo [Reminiscence]
Cortesana (Courtesan): La cortesana [Lady in waiting]
Picotazos (Lovebites): Picotazos [Pecking gossip]
Vuelta al hogar (Coming Home): Vuelta al hogar [Return home]
Te quiero tanto (I Love You so): Te quiero tanto [I love you dearly]
Lejos de ti: Lejos de ti! (Far away from you!) [Far Away from You]
La carcajada (Laughter): La carcajada [the hearty laughter]
Ilusiones perdidas (Lost Dreams): Ilusiones perdidas [Lost illusions]
Cubanas for piano: No. 1, Toque de clave
Cubanas for piano: No. 4, Preludio en son
First Sonata for Cello and Piano: Moderately
First Sonata for Cello and Piano: Scherzo
First Sonata for Cello and Piano: Intermezzo
Second Sonata for Piano and Cello: Fast, anguished
Second Sonata for Piano and Cello: Tempo di mariachi
Second Sonata for Piano and Cello: Moderately slow
Second Sonata for Piano and Cello: Sharply marked