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 0x3e7187a6dd65b579b844e70315d1f1af1f16bfa5c61fcf1a5f554eed4c0210bc. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfb908cd-2477-4dfe-95bc-2055b2a0ccc8.json and https://artists.proofprofile.net/proofs/artist/cfb908cd-2477-4dfe-95bc-2055b2a0ccc8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x111f637dd36400f0bbb0bfa63fa288fa2646ac4f54d9c0995d26c4e7462572b8. 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/DEN962200990.
Three Pieces for Piano, Op. 5: III. Dance - Live
Five Pieces for Piano, Op. 2: I. Vivace - Live
Five Pieces for Piano, Op. 2: II. Andante con moto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5faf80b53806f5b93048cd203e7cb6862cec8f7d233f4ce68a8e325f1804a9. 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/DEN962201012.
Five Pieces for Piano, Op. 2: III. Moderato - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1032dce2e28a4d4506b80e87353d747214c0b54945cddef68ebc2981df3b4275. 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/DEN962201013.
Five Pieces for Piano, Op. 2: IV. Andante - Live
Five Pieces for Piano, Op. 2: V. Allegro vivace - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56722804433457fa171e6e283402607fc3e5d2c89f0247eb5cece5acba9d2889. 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/DEN962201015.
Three Preludes: I. Allegro ben ritmato e deciso - Live
Three Preludes: II. Andante con moto e poco rubato - Live
Three Preludes: III. Allegro ben ritmato e deciso - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e477b8e8a19dc8506be08e4e544d201321f28dc957256a32faf0f7aaed8c80b. 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/DEN962201023.
Nocturnes, Op. 62: No. 1 in B Major. Andante - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c7b6ea6284dfb8a71416376d662bd83a2195436935b3da2b586a7a89192beb. 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/DEN962201030.
Impromptu No. 1 in A-Flat Major, Op. 29 - Live
Impromptu No. 2 in F-Sharp Major, Op. 36 - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd91b1982b532fb3cc775ad9d38cb6ac354f18a926d28b5ec2f25b1ae6127e9. 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/DEN962201050.
Impromptu No. 3 in G-Flat Major, Op. 51 - Live
Polonaise in A-Flat Major, Op. 53 "Heroic" - Live
Lieder ohne Worte, Op. 38: VI. Andante con moto in A-Flat Major "Duetto" - Live
Four Piano Pieces, Op. 1: II. Dodecaphonic Tango - Live
Scherzo No. 2 in B-Flat Minor, Op. 31 - Live
Suite bergamasque, L. 75: III. Clair de lune - Live
Piano Concerto No. 1 in F Major, Op. 1: I. Allegro
Piano Concerto No. 1 in F Major, Op. 1: II. Andante
Piano Concerto No. 1 in F Major, Op. 1: III. Allegro
Piano Concerto No. 1 in F Major, Op. 1: IV. Andante – Molto allegro
Piano Concerto No. 2 in C Major, Op. 21: I. Introduction - Moderato
Piano Concerto No. 2 in C Major, Op. 21: II. Sonata - Allegro con fuoco
Piano Concerto No. 2 in C Major, Op. 21: III. Rondo - Giocoso – Andantino
Piano Concerto No. 3 in C Major, Op. 28: I. Moderato – Allegro
Piano Concerto No. 3 in C Major, Op. 28: II. Moderato
Piano Concerto No. 3 in C Major, Op. 28: III. Allegro molto
Love for Love, Op. 24: Arrival of Guests
Love for Love, Op. 24: Finale - Hymn to Love
Symphony No. 1 in B-Fflat Minor, Op. 4: I. Allegro non troppo
Symphony No. 1 in B-Fflat Minor, Op. 4: II. Adagio - Molto espressivo
Symphony No. 1 in B-Fflat Minor, Op. 4: III. Allegro molto
Symphony No. 2 in C Minor, Op. 9: I. Allegro con fuoco
Symphony No. 2 in C Minor, Op. 9: II. Adagio
Symphony No. 2 in C Minor, Op. 9: III. Allegro molto
Symphony No. 2 in C Minor, Op. 9: IV. Allegro marciale
Symphony No. 3 in A Major, Op. 22: I. Fugue
Symphony No. 3 in A Major, Op. 22: II. Intermezzo
Symphony No. 3 in A Major, Op. 22: III. Finale
Tikhon Khrennikov: Symphony No. 2, Op. 9 & Concerto No. 1, Op. 14
Symphony No. 2, Op. 9: I. Allegro con fuoco
Symphony No. 2, Op. 9: III. Allegro molto
Symphony No. 2, Op. 9: IV. Allegro marchialo
Concerto No. 1 in D Major, Op. 14: I. Allegro con fuoco
Concerto No. 1 in D Major, Op. 14: II. Andante expressivo
Concerto No. 1 in D Major, Op. 14: III. Allegro agitado
Violin Concerto No. 1 in C Major, Op. 14: I. Allegro con fuoco
Violin Concerto No. 1 in C Major, Op. 14: II. Andante espressivo
Violin Concerto No. 1 in C Major, Op. 14: III. Allegro agitato
Violin Concerto No. 2 in C Major, Op. 23: I. Allegro con fuoco
Violin Concerto No. 2 in C Major, Op. 23: II. Moderato
Violin Concerto No. 2 in C Major, Op. 23: III. Allegro moderato con fuoco
Cello Concerto No. 2, Op. 30: II. Con moto
Tikhon Khrennikov Three Songs For Violin And Orchestra, Op. 26
Three Songs for Violin and Orchestra, Op. 26: I
Three Songs for Violin and Orchestra, Op. 26: II
Three Songs for Violin and Orchestra, Op. 26: III
V buryu (Into the Storm), Op. 8: Spi, Natasha, spi, rodnaya [Sleep, Natasha, sleep, my darling]
Opera Arias (Tenor): Shtoda, Daniil - Rimsky-Korsakov, N.A. / Tchaikovksy, P.I. / Dargomyzhsky, A.S. / Rachmaninov, S. / Khrennikov, T.N.
V buryu (Into the Storm), Op. 8: Iz-za lesa svestitsya [the half-moon shines]
Mat (Mother), Op. 13: Sam ne znayu pochemu [for some unknown reason]
Mnogo shumu… iz-za serdets (Much Ado… because of Hearts): Kanzone des Bretunkenen