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 0x8cfb9aac8c3948b515c94a1883caa053a86292702479048d39816d246e22e1c9. 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/c352fdaa-7013-45db-8880-a7946dc1fb95.json and https://artists.proofprofile.net/proofs/artist/c352fdaa-7013-45db-8880-a7946dc1fb95.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Tchaikovsky: Symphonies Nos. 1 & 6 & Other Orchestral Works
Piano Concerto No. 1 in B-Flat Minor, Op. 23, TH 55: I. Allegro non troppo e molto maestoso - Allegro con spirito
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 0x60761cc726ab234136417cc5357a57b1ea5f86936f39cc60af8a9fcc409598cb. 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/ITCC51105022 — a six-check JSON result.
Shostakovitch Symphonies 6, 9 and Festive Overture
Tchaikovsky: Swan Lake, Op. 20, TH. 12 by Gennady Rozhdestvensky (Remastered 2023)
No. 20 Danse hongroise, Hungarian dance (Czárdás): Moderato assai, allegro moderato, vivace - Act III - Swan Lake, Op. 20, TH. 12 - Remastered 2023, Moscow 1969
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2e59e279063b14f80e15a98099e013ac1ef1d23680da4b9cccf9c26dca2eb2. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/PLH492398126 — a six-check JSON result.
Tchaikovsky: Moscow / Ode to Joy / Dmitri the Imposter
Symphony No. 7 in A Major, Op. 92: I. Poco sostenuto - Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e524f4978141cf93f584c85f499da27062aa8845b2556e9d0c5b693b9a1921b. 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/SEWDL9440246 — a six-check JSON result.
Symphony No. 7 in A Major, Op. 92: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e83cb88c70b956ff5e4eaa31fee5ef494d7a68743c695c80c9983dac7496a11. 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/SEWDL9440223 — a six-check JSON result.
Symphony No. 7 in A Major, Op. 92: IV. Finale: Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6f80f3a1baba7fe26d9bd0aeebc2f8c7e146b0e5dc768fc036e41444c85182. 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/SEWDL9511721 — a six-check JSON result.
Georges Bizet: Symphonie en Ut, Roma, Jeux d'enfants
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f67b34e3537f2ada004aecd85a68cd4f2f2f456846aa1272a3dc574d3e5a582. 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/FROV68638301 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc94dc7906b06d3be30b8d7c0c4681c60a27850066240cbf2c3f6e7b9931fd1. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FROV68638302 — a six-check JSON result.
Nikolay Rimsky-Korsakov: Symphony No. 1 - Igor Stravinsky: Symphony, Op. 1
Prokofiev: The Love of Three Oranges Op. 33
Concerto No. 3 in D Minor for Piano and Orchestra, Op. 30: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c58a5df3337fe84b5ab670460d60ea3ca042ec458358ffdfe007fba978cf57. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/SEWDL6008955 — a six-check JSON result.
Concerto No. 3 in D Minor for Piano and Orchestra, Op. 30: II. Intermezzo: Adagio (attacca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1660b62ae9c9779fdbc7513b81576c3c74964f0a9097e02cb4c584049a9b1788. 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/SEWDL6008952 — a six-check JSON result.
Concerto No. 3 in D Minor for Piano and Orchestra, Op. 30: III. Finale: Alla breve
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0f8f1c5fe910f4a10dfd0e132bb0e0dc6700f393eb02b6649b2ddb6afcee70. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SEWDL6008953 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11ac580031d9debc5decd0f7470f42edc672db75461703f295172fa29c7ded2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USX761324201 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2d85f1e152406a3d41a71230f3f2d85344a4913506ac2ae5d16f17fb79a1cc. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USX761324203 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3678016bbf74259412714f05df8e725d416fe1df1f0c8ec8344b5e53007f53. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX761324207 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9795b336b2cc822c5f10831b3b5843f3e6d7801b439f7826fc42d2933f490e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USX761324208 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5247ab96dcc799feab87cfb76a2dc4b7938414a233f9bfe84459f33a80318ab5. 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/USX761324210 — a six-check JSON result.
Rachmaninoff: Symphony No. 3 & Symphonic Dances
Balasanyan: 7 Armenian Songs - 6 Dances from Leyli i Medzhnun (1961)
Myaskovsky: Cello Concerto and Symphonies
Berlioz: Symphonie Fantastique and Harold in Italy
Glazunov: The Complete Symphony Collection
Stravinsky: Orchestral Works - Petrushka Suite, Concerto for Piano and Wind Instruments and Symphony in Three Movements
The Russian Piano Tradition: Heinrich Neuhaus (Recorded 1938-1951)
Barber, Schumann, Khachaturian, Myaskovsky: The Cello Concertos
Beethoven: Piano Concerto No. 3 - Schumann: Piano Sonata No. 1
Tchaikovsky: Italian Capriccio, Op. 45, Serenade for String Orchestra, Op. 48 & 1812 Overture, Op. 49
Sibelius: En Saga, Op. 9, Finlandia, Op. 26 & Violin Concerto, Op. 47
Schumann: Carnaval, Op. 9, Symphony No. 4, Op. 120, Kinderszenen, Op. 15 & Fantasiestücke, Op. 12
Schubert: Symphony No. 2, D. 125 & Symphony No. 8, D. 759
Brahms: Symphony No. 1, Op. 68 - Schubert: Symphony No. 2, D. 125
Bizet: L'arlésienne Suite No. 1, Op. 23bis & Brahms: Hungarian Dances, WoO 1
ラフマニノフ：ピアノ協奏曲第3番ニ短調作品30、ピアノ・ソナタ第2番変ロ短調作品36
Honoroff, R.: Symphonies Nos. 1 and 2 / Testament
Boris Tchaikovsky Music for Orchestra: Alexander Gauk and Samuil Samosud
Symphony No. 8 in C Minor, Op. 65: I. Adagio - Allegro non troppo - Adagio - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d53f5021bd34a69f79b3c28b051b5ed3296a48c821c77eb2ed76ff6846bfb37. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USB8U2402100 — a six-check JSON result.
Symphony No. 8 in C Minor, Op. 65: II. Allegretto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cb2bc0d209099e9cfa3435eb166f278255da9f4ec9709fea3ee1b81e1cf446. 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/USB8U2402101 — a six-check JSON result.
Symphony No. 8 in C Minor, Op. 65: III. Allegro non troppo - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5c26fc4b6d2da6e2c918f7b3d4ea1fa74e0ed97cc11e4fbc4015f0fc709a20. 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/USB8U2402102 — a six-check JSON result.
Symphony No. 8 in C Minor, Op. 65: IV. Largo - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3406332788bea1c29a84bba39ea99bf6ed7c53e6c24673985522db12f6411908. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USB8U2402103 — a six-check JSON result.
Symphony No. 8 in C Minor, Op. 65: V. Allegretto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23e8f5f110a3ab5448f464de9cde231729da7ffe93a903e1e7dbd8768b58817. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USB8U2402104 — a six-check JSON result.
Tchaikovsky: Italian Capriccio, Op. 45, TH 47, Romeo and Juliet, TH 42 & 1812 Ouverture, Op. 49, TH 49
Rimsky-Korsakov: Scheherazade, Op. 35 & Tale of Tsar Saltan Suite, Op. 57
Piston: Symphony No. 6 / Concerto For Orchestra / Concertino for Piano and Orchestra / Concerto for String Quartet, Winds and Percussion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71085fb2f6f7bc360db322f8298960597ffa6e7bc582252ba012ded8cc7150be. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ049700071 — a six-check JSON result.
Ancient Airs and Dances, Suite No. 2, P. 132: IV. Bergamasca (Bernardo Gianecelli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f13b38fff58d6bbaeb8eff0805b1690b7481c3e07b784c749539f340846a7d. 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/SEWDL9523912 — a six-check JSON result.
Piano Concerto No. 2 in C Minor, Op. 18: II. Adagio sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c1852b9e357e3e8aae432e640695bf5995d3cfab992f0206a3d7e4aaafdca4. 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/SEWDL9130062 — a six-check JSON result.
Symphony No. 2 in D Major, Op. 36: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e82c21c7157a0fa1dda6577f6f23ebc613157f36168a82d0158a612aeb70c0. 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/SEWDL6019111 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e524f4978141cf93f584c85f499da27062aa8845b2556e9d0c5b693b9a1921b. 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/SEWDL9440246 — a six-check JSON result.
Symphonie Fantastique, Op. 14, "Episode de la vie d'un artiste": V. Songe d'une nuit du sabbat (Dream of a Witches' Sabbath)
The 35 Most Evil Pieces of Classical Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d151537205897db54bf6f6d9a0b9c80a735bd35af5d76393c04e4746312c5fc. 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/DEB790300936 — a six-check JSON result.