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 0x22bcee07f5d17cc06340ae1d82188d4af546f72d0e67776b33e5c62d5b92985c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90decd99-cd72-45ff-a0ec-87caaa2007dd.json and https://artists.proofprofile.net/proofs/artist/90decd99-cd72-45ff-a0ec-87caaa2007dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
AMEB Piano for Leisure Fifth Grade Series 1
Fur Elise BEETHOVEN L van For Elise WoO 59
Prelude CHOPIN F from Preludes Op 28 No 4
Axel F FALTERMEYER H from Beverly Hills Cop
Consolation MENDELSSOHN F No 3 from Lieder ohne Worte Op 30
Andante Cantabile MOZART WA from Sonata K 330
The heart asks for pleasure first NYMAN M from The Piano
Hush Collection Volume 12: The Wind in the Willows
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 0xd4eed12fe3b2c0173078876c81cf41bd29ad6bedf59672997730983808c84d19. 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/AUL721300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b2c550d1da8adb47f740b30295d798e3d4ade05600b937ad23705f7a5b792f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUL721300053.
Chopin: Nocturne in D-flat major, Op. 27 No. 2
Chopin: Étude in E major, Op. 10 No. 3 (Tristesse)
Chopin: Étude in A-flat major, Op. 25 No. 1 (Aeolian Harp)
Rachmaninov: Prelude in E-flat major, Op. 23 No. 6
Rachmaninov: Prelude in D major, Op. 23 No. 4
Rachmaninov: Prelude in G-sharp minor, Op. 32 No. 12
Poulenc: Intermezzo No. 2 in D-flat major
Scriabin: Prelude for the Left Hand, Op. 9 No. 1
Songs Without Words: 3. The Wind in the Willows
Songs Without Words: 2. Walk a Golden Mile
Sonata: Solo Piano Works Composed & Performed by Mark Isaacs
Sonata: II. Allegro esultante - Allegretto ma molto cantabile e nobilmente - Andante - Andante maestoso
Songs Without Words: 1. So Many Questions
Theme and Variations on ‘The Snow It Melts the Soonest’
Symphony No. 2: I. Largo maestoso ma agitato – Moderato con brio – Allegro assai – Allegretto teneramente – Moderato ma maestoso
Symphony No. 2: III. Largo supplicando – Moderato con brio
Forgotten Dreams: Australian Guitar Music
5 Bagatelles: No. 1, Allegretto cantando
5 Bagatelles: No. 3, Vivace molto pesante
Angel - Arr. for Guitar Quartet by Mark Isaacs