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 0x23badbf1877bf9a868940ce461f2356465b3fcd006f6843a0b10d38314c22c0e. 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/86b65455-8072-4c3f-a1d4-f327aa975cf5.json and https://artists.proofprofile.net/proofs/artist/86b65455-8072-4c3f-a1d4-f327aa975cf5.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Goethe-Lieder: No. 29. Anakreons Grab, "Wo die Rose hier blüht". Sehr langsam und ruhig (Arr. for Baritone and String Orchestra by David Matthews)
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 0x5c9081cd8b5d616bd10d59ecaa20f5e3226bc4375b3c5453c04ba0041c7b9278. 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/NLA460914151 — a six-check JSON result.
Oboe passion - Arias & concertos by J.S. Bach & sons
Ich bin vergnügt mit meinem Glücke BWV 84: Ich bin vergnügt mit meinem Glücke
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24389175ba38107eb58e77b46ea08bdee292b42aab8cd4812e2bb25f1b432e4a. 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/NLB151100732 — a six-check JSON result.
Concerto in A for Oboe d'amore, Strings and Continuo: (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998dc25e8d9e03b2a20c1dc4d0d1cec25b0debc78f3330a7340cfec3e9553b10. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/NLB151100745 — a six-check JSON result.
Liebster Jesu, mein Verlangen BWV 32: Liebster Jesu, mein Verlangen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734ab6026ae169e4b4597a0db48eafff1b3408eeea188c73f42d282ca2269a45. 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/NLB151100734 — a six-check JSON result.
Ich hatte viel Bekümmernis BWV 21: Seufzer, Tränen, Kummer, Not
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ac90486306c98e6a1e6b0e5a22827b2bc14839b18f2ed1204307ac9fc66417. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLB151100737 — a six-check JSON result.
Wer nur den lieben Gott läßt walten BWV 93: Ich will auf den Herren schaun
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaffd739228c98659896d26232569de8537fecccd302a0c99d558e57aab37c86. 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/NLB151100739 — a six-check JSON result.
Wer mich liebet, der wird mein Wort halten BWV 74: Komm, komm, mein Herze steht dir offen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a994e08a54081f1cdb74a3ca3783bbd6e937bce4f37873c92d3e63ef80df043. 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/NLB151100741 — a six-check JSON result.
Ballade for alto saxophone, piano, timpani and strings (1938)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0338ecaa5efc934efb52bce7b822b9231abec993538e59601314d0cadd64391b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLC242100409 — a six-check JSON result.
Serenade for Strings in E Major, Op. 22, B. 52: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea82bf4f5437ed88f11bc5b99d7855c93e469a31015ca9f2b3f1b0296ba7a120. 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/NLA460911042 — a six-check JSON result.
Serenade for Strings in E Major, Op. 22, B. 52: II. Tempo di Valse - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42141ce2cc2c3889f587b431dc6a464e53b81422f6d684691dcf588ea17949d. 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/NLA460911043 — a six-check JSON result.
Serenade for Strings in E Major, Op. 22, B. 52: III. Scherzo. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc976e4c2de1f6e84a8acd5a27e485c6f32ad137b4b9b038150acf1fcb88f3548. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLA460911044 — a six-check JSON result.
Serenade for Strings in E Major, Op. 22, B. 52: IV. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7726727080cdfe6eea8fd416e6c98659c94d31aec2fb11ab56d29e38d2988567. 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/NLA460911045 — a six-check JSON result.
Concerto for 2 Harpsichords, Strings & Continuo in C Major, BWV 1061: 1. [No Tempo Indication] (performed on two pianos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6935f39548d85aac1119adffa176874a1ad48b29d542e349281fbd6dfa9129a4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLK4J1900004 — a six-check JSON result.
Concerto for 2 Harpsichords, Strings & Continuo in C Major, BWV 1061: 2. Adagio ovvero Largo (performed on two pianos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71484702d215e53b47f78e9739e35c32994356e9447b358fb5cd5f8d93fdcc79. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLK4J1900005 — a six-check JSON result.
Concerto for 2 Harpsichords, Strings & Continuo in C Major, BWV 1061: 3. Fuga (performed on two pianos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcbe4b2596a3b04f89de4df6674e9267f6ab412ed6d95e55637480f9351c0d5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLK4J1900006 — a six-check JSON result.
Concerto for 2 Harpsichords, Strings & Continuo in C Minor, BWV 1060: 1. Allegro (performed on two pianos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d981c2f29c6e6a5b6f36be66a9d297835e1480b1b0aefcf680c0cf449ce9054. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLK4J1900001 — a six-check JSON result.
Concerto for 2 Harpsichords, Strings & Continuo in C Minor, BWV 1060: 2. Adagio (performed on two pianos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600ccc3f2b32162ab3b506b16f27ef3ca5c63dbba5d15649ef31bc95987b90b9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLK4J1900002 — a six-check JSON result.
Concerto for 2 Harpsichords, Strings & Continuo in C Minor, BWV 1060: 3. Allegro (performed on two pianos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8bed0aa8c89bbd5b1ac217fdbfc51ea31c58f3ce2d37704aa7588e61a0b9c6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLK4J1900003 — a six-check JSON result.
Aus tiefer Not schrei ich zu dir, BWV 687 (Arr. For Piano Four Hands by György Kurtág)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe732d8a8ab93a2f66ebe37d14a3593c5dff546913e1f62be8cf065546a9a4c6b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLK4J1900007 — a six-check JSON result.
Orgelbüchlein: Nun komm’ der Heiden Heiland, BWV 599 (Arr. For Piano Four Hands by György Kurtág)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d0b11a3e1bc529cdf982acf626991244c2dedcef8306c483f3a440327c1c30. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLK4J1900008 — a six-check JSON result.
O Lamm Gottes unschuldig, BWV Deest (Arr. For Piano Four Hands by György Kurtág)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3ea40a7a1a97eb8408f308ef8c7e2a7df3eb10a73289901dfca85f30241895. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLK4J1900009 — a six-check JSON result.
Gottes Zeit ist die allerbeste Zeit, BWV 106: 2a. Gottes Zeit, ist die allerbeste Zeit (Arr. For Piano Four Hands by György Kurtág)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9b4091bc7f2d054ffc30c2fb70d5b7b01bc26dbab0d59076bb8ac5219b19a8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLK4J1900010 — a six-check JSON result.
"Was mir behagt, ist nur die muntre Jagd" Cantata, BWV 208: 9. Schafe können sicher weiden (Arr. For Piano Four Hands by Mary Howe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6d09081cc2156769789cef2756465809dc625d2a3f575cdace5c764837baeb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLK4J1900011 — a six-check JSON result.
Herz und Mund und Tat und Leben, Cantata BWV 147: 10. Jesus bleibet meine Freude (Arr. For Two Pianos by Myra Hess) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70adec76e74f17b9e504750edc078b30fab3100c92008a4ca6b83e9203b53a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLK4J1900012 — a six-check JSON result.
Ich hatte viel Bekümmernis, BWV 21, Erster Teil: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd25e47081af795830474bb7d434a4cc6f921075318a4cb2ad0c035463c670. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLA460915411 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361b579c309a5464df2a761abdc353196e1833436d2aea3a3941be2743c4dd2e. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/NLA460915412 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe5456181b7615a9a44bfe670134a05dbc284f969c2cb76ad6d39a535b4e4e0. 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/NLA460915413 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4218e38733e742adb954a84276392b1d0c05a073da922d2cce33362de26a02b3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NLA460915414 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d386a2ad9b16d91515159492551407df531ba66dfa7bee1d1b6bfab1966bf9. 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/NLA460915415 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dd7af2a29da59b2cddc2cfa0a436665a7a677f13a97502f298174c9e4ff973. 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/NLA460915416 — a six-check JSON result.
Concerto for Violin and Oboe in C Minor, BWV 1060R (Version for Two Violins): I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2222fb2d119fa1426820f7ed6cdd18e4551f3fcfce42dbb6ef07eea156932a40. 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/NLA460915417 — a six-check JSON result.
Concerto for Violin and Oboe in C Minor, BWV 1060R (Version for Two Violins): II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7d81fa5be79ea79a2db3a758d85e32773653a578351abf1de5102373f86429. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLA460915418 — a six-check JSON result.
Concerto for Violin and Oboe in C Minor, BWV 1060R (Version for Two Violins): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b630a4b8e7d70c1fa6cfc0f90ec48221c2f037467add757ad163d10bf2eab94. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLA460915419 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc353bcfa466f25b842881ec414a8acda2ebdf7b42ea69c47fc876a9a2d34778f. 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/NLA460915420 — a six-check JSON result.
Bach: Ich hatte viel Bekümmernis, BWV 21, Erster Teil: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd25e47081af795830474bb7d434a4cc6f921075318a4cb2ad0c035463c670. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLA460915411 — a six-check JSON result.
Tchaikovsky: Serenade for Strings, Op. 48 - Arensky: Chamber Symphony
Bartók: Divertimento - Brahms: String Quintet in G
Shostakovich: Chamber Symphonies, Op. 110a & 118a - Weinberg: Concertino, Op. 42
Brahms: String Quartet in C Minor - Schönberg: Verklärte Nacht
Shostakovich: String Quartets Nos. 2 & 4
Beethoven: String Quartet, Op. 135 - Walton: Sonata for Strings
Tchaikovsky: Souvenir de Florence / Verdi: String Quartet
Sumera: Concerto per voci e strumenti: I. Furioso
Vivaldi: Cello Concerto in F Major, RV412: 2. Larghetto
Vivaldi: Concerto for 2 Cellos, Strings and Continuo in G Minor, RV 531: 3. Allegro
Clarinet Concerto in A Major, K. 622: II. Adagio
Mozart: Clarinet Concerto in A Major, K. 622 & Clarinet Quintet in A Major, K. 581
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1d0908ffb9d8915b09ae22f8b3c8e6ece4825ccf08a934090a5e823e6ab075. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEAEM0263020 — a six-check JSON result.