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 0x181c55eac77ffed9901c7365ff0d22d65e69f4ffc23a17434a7eb22fa4c0fb31. 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/cb5e6230-531e-4513-b8aa-86e089d71d44.json and https://artists.proofprofile.net/proofs/artist/cb5e6230-531e-4513-b8aa-86e089d71d44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tre Polonesi Concertanti No. 1, Op. 137: Allegretto
Tre Polonesi Concertanti No. 2, Op. 137: Allegretto
Tre Polonesi Concertanti No. 3, Op. 137: Allegretto
Four Elizabethan Lute Duets: I. The Flat Pavane
Four Elizabethan Lute Duets: II. The Galliard to the Flat Pavan
Four Elizabethan Lute Duets: III. A Fancy
Four Elizabethan Lute Duets: IV. A Merry Mood
Tre Esercizi No. 1 in E Minor: Tarantella
Two Pieces from Retratos No. 1: Schottisch
Two Pieces from Retratos No. 2: Corta Jaca
Robin Hill And Peter Wiltschinsky 'Arrival'.
Suite Spagnola: I. Andalusa, II. Fandango, III. Sevillana
Romances Sans Paroles Op. 17, No.3: Andante Moderato
Nocturne de Salon Op. 227: I. Allegro II. Largo III. Allegretto
Concierto de Aranjuez for Guitar and Orchestra: 2. Adagio
Cello Suite No.1 in G Major, BWV 1007: I. Prélude
Lute Suite No.4 in E Major. III. Gavotte en Rondeau
Keyboard Sonata in D Minor, K. 141 (Arr. for Two Guitars)
Song Without Words, Op. 19: I. Andante con moto (Arr. for Two Guitars)
Two Elizabethan Lute Duets: 1. Le Rossignol - 2. My Lord Chamberlain's Galliard (Arr. for Two Guitars)
Lark in the Morning (Arr. for Two Guitars)
Milan Suite: 1. Pavane - 2. Galliard - 3. Allemande - 4. Gigue
Ritual Fire Dance (Arr. for Two Guitars)
The Art of Robin Hill & Peter Wiltschinsky
Gangi: Suite italiana: I. Allegro vivo. Da un saltarello romano del 1400
Gangi: Suite italiana: II. Adagio disteso. Da una melodia popolare abruzzese
Gangi: Suite italiana: III. Allegro spigliato. Dalla tarantella dell'opera "Piedgrotto" di Ricci
Sor: Les deux amis, Op. 41: Introduction. Andante largo
Sor: Les deux amis, Op. 41: Thème. Andantino
Sor: Les deux amis, Op. 41: Variation II
Sor: Les deux amis, Op. 41: Variation III
Sor: Les deux amis, Op. 41: Variation IV
Absil: 3 Pièces pour deux guitares, Op. 119: No. 1, Danse
Absil: 3 Pièces pour deux guitares, Op. 119: No. 2, Musette
Absil: 3 Pièces pour deux guitares, Op. 119: No. 3, Gigue
Giuliani: Variazioni concertanti, Op. 130: Introduzione
Giuliani: Variazioni concertanti, Op. 130: Tema
Giuliani: Variazioni concertanti, Op. 130: Variation I
Giuliani: Variazioni concertanti, Op. 130: Variation II
Giuliani: Variazioni concertanti, Op. 130: Variation III
Giuliani: Variazioni concertanti, Op. 130: Variation IV
Giuliani: Variazioni concertanti, Op. 130: Variation V
Giuliani: Variazioni concertanti, Op. 130: Variation VI
Castelnuovo-Tedesco: Les guitares bien tempérées, Op. 199: Prélude No. 24
Traditionel: Jota (Arr. Bobri, Hill & Wiltschinsky for Two Guitars)
Bach, JS: Orchestral Suite No. 2 in B Minor, BWV 1067: VII. Badinerie (Arr. Hill for Two Guitars)
Handel: Solomon, HWV 67, Act 3: Sinfonia "The Arrival of the Queen of Sheba" (Arr. Hill for Two Guitars)
Mendelssohn: Songs Without Words, Book I, Op. 19b: No. 1, Andante con moto, MWV U86 (Arr. Wiltschinsky for Two Guitars)
Scarlatti: Keyboard Sonata in D Minor, Kk. 9 "Pastorale" (Arr. Hill for Two Guitars)
Scarlatti: Keyboard Sonata in D Minor, Kk. 141 (Arr. Hill for Two Guitars)
Scarlatti: Keyboard Sonata in B-Flat Major, Kk. 202 (Arr. Hill for Two Guitars)
Rossini: Il barbiere di Siviglia: Ouverture (Arr. Giuliani for Two Guitars)
Fauré: Pavane, Op. 50 (Arr. Hill for Two Guitars)
Ravel: Le tombeau de Couperin, M. 68: Prélude (Arr. Hill for Two Guitars)
Falla: La vida breve: Danza española No. 1 (Arr. Hill & Wiltschinsky for Two Guitars)
Falla: El sombrero de tres picos: Danza del molinero (Arr. Hill & Wiltschinsky for Two Guitars)
Falla: El amor brujo: No. 8, Danza ritual del fuego (Arr. Hill & Wiltschinsky for Two Guitars)
Miranda: Luperce (Arr. Almeida for Two Guitars)
Tárrega: Recuerdos de la Alhambra (Arr. Sagreras for Two Guitars)
Variazioni concertanti per due chitarre, op.130 : Introduzione
Zzzz. Carnival of the Insects - A Symphony for Life
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 0x91798c8c8e799e7eba62fb0cfa7a7b470cf7a8009ccdb2792aaed7861c4f0924. 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/DEA808900465.