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 0x4ab081c62bb2b354ecae8abc8545a31eddeeae175828f44e9479cb149bcce5af. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2be5195d-8b01-4fc7-9a97-30f0355adb91.json and https://artists.proofprofile.net/proofs/artist/2be5195d-8b01-4fc7-9a97-30f0355adb91.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nocturne, B-Moll, op. 9, No. 1: Larghetto
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 0x672c1caa9225c8fabd0959789fc912a8c093b61cc998f5fa19d387ffc2c5b83d. 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/DEA769902205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa157532f5c5649923fef00a43a35b58693e849e07796807f2e1a58898907acf4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEA769906202.
Nocturne, Fis-Dur, op. 15, Nr. 2: Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca259654aef58fc6e51cb99aa4d4e7897674ef49f2787f9c45f33d75409cb4f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEA769906203.
Nocturne, Cis-Moll, op. 27, Nr. 1: Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56578b527052f63b33fd63cb025b66402faa6e3d1d89caed0124a1672d1f5259. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEA769906205.
Nocturne, Des-Dur, op. 27, Nr. 2: Lento sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca10e680c369292902809eff9f33bf2586daf652fd9fd4787151e28e69dbb831. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEA769906206.
Nocturne, H-Dur, op. 32, Nr. 1: Andante sostenuto
Nocturne, Fis-Moll, op. 48, Nr. 2: Andantino
Nocturne, E-Moll, op. 72, Nr. 1: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e1284a53b41419c78f141d1cf84cb3a02f2ce352b38f266114fe51b29e4675. 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/DEA769906210.
Walzer, Des-Dur, op. 64, Nr. 1: Molto vivace
Walzer, Cis-Moll, op. 64, Nr. 2: Tempo giusto
Walzer, As-Dur, op. 69, Nr. 1: Tempo di Valse
Piano Concerto No. 5 in E Major, Op. 73: I. Allegro
Piano Concerto No. 5 in E Major, Op. 73: II. Adagio un poco mosso
Piano Concerto No. 5 in E Major, Op. 73: III. Rondo. Allegro
Tschaikowsky: Piano Concerto No.1, Op.23
Piano Concerto No.1, Op.23: I. Allegro non troppo e molto maestoso - Allegro con spirito
Piano Concerto No.1, Op.23: II: Andantino senplice - Prestissimo
Piano Concerto No.1, Op.23: III. Allegro con fuoco
Klaviersonate No. 23 in F Minor, Op. 57 (Appassionata): 1. Allegro assai
Klaviersonate No. 23 in F Minor, Op. 57 (Appassionata): 2. Andante con moto attaca
Klaviersonate No. 23 in F Minor, Op. 57 (Appassionata): 3. Allegro ma non troppo - Presto
Klaviersonate No. 14 in C-Sharp Minor, Op. 27 No. 2 (Mondscheinsonate): 1. Adagio sostenuto
Klaviersonate No. 14 in C-Sharp Minor, Op. 27 No. 2 (Mondscheinsonate): 2. Allegretto
Klaviersonate No. 14 in C-Sharp Minor, Op. 27 No. 2 (Mondscheinsonate): 3. Presto agitato
Klaviersonate No. 8 in C Minor, Op. 13 (Pathétique): 1. Grave - Allegro di molto e con brio
Klaviersonate No. 8 in C Minor, Op. 13 (Pathétique): 2. Adagio cantabile
Klaviersonate No. 8 in C Minor, Op. 13 (Pathétique): 3. Rondo
13 Preludes, Op. 32: No. 12 in G-Sharp Minor
Four Impromptus, Op. 142, D. 935: No. 2 in A-Flat
Lyric Pieces, Op. 43, No. 6: An den Fruhling
16 Waltzes, Op. 39: No. 15 in A-Flat Major
8 Pieces for Piano, Op. 76: No. 8, Capriccio in C Major
Sonata for Piano No.24 F Sharp Major Op.78 'A Therese': Adagio Cantabile
Sonata for Piano No.24 F Sharp Major Op.78 'A Therese': Allegro Ma Non Troppo
Sonata for Piano No.24 F Sharp Major Op.78 'A Therese': Allegro Vivace
Classical Music for the Reader: Great Masterpieces for the Dedicated Reader