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 0x78be70cc2b55145fcd33c749776e6067202c7e5608f923a229a4dbd0eea3eb0f. 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/cc0937f8-619c-4e5b-81e0-cb02f411c8ba.json and https://artists.proofprofile.net/proofs/artist/cc0937f8-619c-4e5b-81e0-cb02f411c8ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anima del sur: Milongas and Tango for 2 Guitars
Sonatina Tropical: III. Salsa en pinones
Vocal Music (Argentina and Brazil) - Cardoso, J. / Assad, S. / Cartola, A.
Balada para Martin Fierro (Arr. For guitar)
Um Bandolim Que Chora - Jorge Cardoso Interpreta Dinaldo Domingues
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 0xc12a3e60399348fbf5faa11a05d79d59943672bc3b36dd4929a471846a89f74b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1734007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7d66284d2c579674c9d7f46927de2b5a18471278d53eceaa262454ff45dbeb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1734010.
Iberia, Book 1: I. Evocacion (Arr. M. Schwarz)
Iberia, Book 1: II. El Puerto (Arr. M. Schwarz)
Iberia, Book 3: I. El Albaicin (Arr. M. Schwarz)
2 Arabesques: No. 1 in E Major (Arr. M. Schwarz)
2 Arabesques: No. 2 in G Major (Arr. M. Schwarz)
Volvere siempre a San Juan (Arr. M. Nagy)
24 Piezas Sudamericanas: Vals Peruano (Arr. M. Schwarz)
Gay Divorce: Night and Day (Arr. M. Schwarz)
Centone di sonate, Op. 64, MS 112, Sonata No. 1 in A Minor: I. Introduzione - Tempo di marcia
Centone di sonate, Op. 64, MS 112, Sonata No. 1 in A Minor: II. Rondoncino. Allegro
Al Compás de la Vigüela (Version for Violin & Guitar): I. Abusete [Galopa]
Al Compás de la Vigüela (Version for Violin & Guitar): II. Senemaite [Guarania]
Al Compás de la Vigüela (Version for Violin & Guitar): III. Atulei [Valse]
Al Compás de la Vigüela (Version for Violin & Guitar): IV. Brota un Lamento Sentido [Milonga]
Al Compás de la Vigüela (Version for Violin & Guitar): V. Meticuloso [Chorô]
Cantabile for Violin & Guitar in D Major, Op. 17, MS 109
Tango Suite: Tango II (Arr. for Violin & Guitar)
Histoire du Tango: I. Bordel 1900 (Arr. for Violin & Guitar)
Sérénade pour deux Guitarres: Predulo e Canzona
Sérénade pour deux Guitarres: Allegro trepidante
Sérénade pour deux Guitarres: Andante malinconico
Sérénade pour deux Guitarres: Con Allegria
Villa-Lobos, H.: 5 Preludes / Cardoso, J.: Homenaxe A Luis Seoane / Ramirez, A.: Alfonsina Y El Mar / Bilhar, S.: Tira A Poeira
Homenaxe a Luis Seoane: I. Na alba, Galicia
Homenaxe a Luis Seoane: II. Fardel de eisilado
Homenaxe a Luis Seoane: III. Cos irmans doutra terra
Chôros No. 1, W161: Choro No. 1, "Choro tipico"
Suite popular brasileira: II. Schottisch
24 Piezas Sudamericanas: Vals Venezolano
Cello Suite No. 2, BWV 1008: II. Allemande
Cello Suite No. 2, BWV 1008: III. Courante
Cello Suite No. 2, BWV 1008: IV. Sarabande
Cello Suite No. 2, BWV 1008: V. Minuet I & II
Domeniconi: Chaconne / Villa-Lobos: Guitar Concerto (Excerpt) / Kavanagh: 3 Preludes / Briny Ocean
Chansons et danses: Cancion y Danza No. 1
Guitar Concerto: 2nd movement (Arr. D. Kavanagh)
Pujol, M.: Suite Del Plata, No. 1 / Elegia Por La Muerte De Un Tanguero / Piazzolla: 5 Piezas (Excerpts) / Luna, A.: 3 Estudios (Excerpts)
Elegia por la muerte de un tanguero (Elegy for the Death of a Tango Player): No. 1, Confuseta [In Confusion]
Elegia por la muerte de un tanguero (Elegy for the Death of a Tango Player): No. 2, En melancolia [In Melancholy]
Elegia por la muerte de un tanguero (Elegy for the Death of a Tango Player): No. 3, Epilogo [Epilogue]
4 Valses Venezolanos: No. 3, Natalia, "Vals criollo"
6 Danzas tradicionales for 2 Guitars, Pal' Nato: Pal' Nato
La Peregrinacion (Version for guitar duo)
Las 4 Estaciones Porteñas: III. Otono porteno (Arr. For 2 guitars)
Las 4 Estaciones Porteñas: I. Inverno porteno (Arr. For 2 guitars)
Las 4 Estaciones Porteñas: IV. Primavera portena (Arr. For 2 guitars)