1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70827ff45e35985ea7c72abc5ab85f949355a87866c73f3838f9998e7c38726c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06160a16-44e0-4ac6-ba39-a2829b573581.json and https://artists.proofprofile.net/proofs/artist/06160a16-44e0-4ac6-ba39-a2829b573581.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Symphony No. 1 in E-Flat Major: I. Adagio - Allegro - Andantino
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cda4e85ef522d845327b44a348c8536b2400abd6920f75bb9f954c2e97793d7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1521470 — a six-check JSON result.
Symphony No. 1 in E-Flat Major: II. Scherzo: Prestissimo - Trio: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8e51bc180bc7168eba3fc348190db5d722d4360eaf9dcb8b745d590e46787d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1521471 — a six-check JSON result.
Symphony No. 1 in E-Flat Major: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43fdfd6a488bd8e13d222943f5dfd83a864d1cd812077b8714568afc7cd9a4c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1521472 — a six-check JSON result.
Symphony No. 1 in E-Flat Major: IV. Allegro molto vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddb8b91cf8018c6fbe308c697e7bb21104ddf1b3df6b168a30adc2017de3e24. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1521473 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab3f9fab620c464ee4bfeddd30f0308d6fb2e499feb6cb6fc458497cf3cdfef. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1521474 — a six-check JSON result.
Symphony No. 2 in B Minor: II. Scherzo: Prestissimo. Trio: Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dd6e75cf72e2863ec131bfcbd1dd940c3ff8eebb3ef23fd01aa854543fc58b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1521475 — a six-check JSON result.
Symphony No. 2 in B Minor: III. Andante - IV. Finale: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9176c9e58f96a2eb0b539a31a0c3c77812be31d926cfb05c04624bdfa48bc84b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1521476 — a six-check JSON result.
Emil Gilels plays Tschaikowsky and Rachmaninov Piano Concertos
Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2bbf83388ff5808af30d254423cf99d3853e60a05c6836b2e57135c478a783. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U2009461 — a six-check JSON result.
Berg: Violin Concerto; Brahms: Tragic Overture; Alto Rhapsody; Kodály: Psalmus Hungaricus
Schubert & Beethoven: Orchestral Works (Remastered 2023) [Live]
Milestones of a Conductor Legend: Kirill Kondrashin, Vol. 10
Balakirev: Symphony No. 2, In Bohemia, Overture on Three Russian Songs
Prokofiev: The Tale of the Buffoon (Live)
Sviatoslav Richter - The Piano Concertos 1950-55
Piano Concerto No. 2 in B flat Major, Op. 83: I. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dd0d86e87c964023e55eb3c1442b49e5479497e0ba26845c3f21d3a5c5a3c4. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U2007637 — a six-check JSON result.
Piano Concerto No. 1 in B Flat Major, Op. 23: I. Andante ma non troppo e molto maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb659939193a6a27c9c87a2bcc79b6008e65f09cf0fc3edd040c29566f636302. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U2007644 — a six-check JSON result.
J.S. Bach: Sonatas for Cello & Harpsichord; J. C. Bach; Cello Concerto in C minor; Breval: Cello Sonata in G major
Cello Concerto in C minor, W.C 77 : I. Allegro molto maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e82b23ba01e3d50bb728ba8045a321083187a2944e053fbc5cc27d13d335c87. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2123900 — a six-check JSON result.
J.S. Bach: Concerto for 2 Harpsichords in C Major, BWV 1061 - Beethoven: Piano Concerto No. 5 in E-Flat Major, Op. 73
Brahms: Violin Concerto in D Major, Op. 77 (Live)
The Great Classical Music #144: Petr Iljič Čajkovskij // Nicolaj Rimskij- Korsakov
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f08d1c0c75043839eb06f80c6ed91ddab369f82f049652549289057f809d31. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2053489 — a six-check JSON result.
DAVID OISTRAKH, violin: M. Bruch: Violin Concerto No.1 in G minor, Op. 26 / LEONID KOGAN, violin: Paganini: Violin Concerto No.1 in D major, Op. 6 and M. Ravel: "Tzigane" Rhapsody for Violin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4975464dc149aaab8e2c6ee2bd3231a979be65e6722c903aa425a4c48e9f707. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK2Y21702322 — a six-check JSON result.
Glinka & Rimsky-Korsakov: Orchestral Works
Mendelssohn & Beethoven: Violin Concertos
Egyptian Nights, Op. 50a: V. Snake Charmer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a25ffef2de68bf8e9a5870f6fcaa21f501bebe20a63431065ffb46d9b33ea89. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK2Y21702856 — a six-check JSON result.
ARSM I, Vol. 48. Lyapunov: Symphony No. 2, Op. 66 (Live)
Saint-Saëns, Milhaud: Concertos for Cello and Orchestra
Shostakovich Doppeltes Spiel: No. 1, Roter Oktober
Schostakowitsch: Doppeltes Spiel -playing a double game (CD 1 - 3 in German)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127f51d63275815d50bc42529a7db3a6bad9aff93bf1387b063f1e1e0fcd58aa. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW72192901 — a six-check JSON result.