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 0x8f70ac7a17f14fd1241f197afe077952c062199df2d838da7909d7452af87095. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca76ca9c-e5d0-40a1-9827-cdc3f0934b1c.json and https://artists.proofprofile.net/proofs/artist/ca76ca9c-e5d0-40a1-9827-cdc3f0934b1c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Birgit Nilsson sings German Opera - Arias by Wagner, Weber & Beethoven
Lohengrin, WWV 75 / Act 1: "Einsam in trüben Tagen"
Orchestra of the Royal Opera House, Covent Garden
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 0x061a9720b027cc51106bb16d4081b91a5d84268f07abb85f9ff4e5a5f2e05a0e. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBF076312590 — a six-check JSON result.
Il Trovatore / Act 4: "Vanne, lasciami...D'amor sull ali rosee"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1938abebaf75e75db7e9e7925106639b740e5e59c3261e7e9daabdccd1d18abe. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBF076613460 — a six-check JSON result.
Verdi: Falstaff; Cimarosa: Il maestro di Cappella – Excerpts (Opera Gala – Volume 14)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4f5784461444a820b1023b6b8f7c0c00cc5d52dc5757c296257afdf6907b13. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBF076010661 — a six-check JSON result.
A Guided Tour of Nationalism in the Romantic Era, Vol. 8
Celebrating 50 Years Devoted to British Music, Set 2: Gordon Jacob to William Wordsworth
Rigoletto, Act IV: Act IV: La donna e mobile (Duke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8f53213b598cd08428c3de4826b8dbcd62da72e9c9b17a5c625ad5791f02ae. 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/ITCC51103028 — a six-check JSON result.
Lloyd: Symphonies Nos. 6 & 7 "Proserpine"
Stevens: Cello Concerto - A Symphony of Liberation
Stevens: Violin Concerto - Symphony No. 2
Verdi: Preludes, Overtures & Ballet Music, Vol. 4
Verdi: Preludes, Overtures & Ballet Music, Vol. 3
Amy Shuard Sings Operatic Arias In Italian
Verdi: Preludes, Overtures & Ballet Music, Vol. 2
Verdi: Preludes, Overtures & Ballet Music, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d35ecc821a1b7aa0a701b6627abf733f6018df8aa9231cd2e616da98cb00c3c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBARU9800790 — a six-check JSON result.
Gliere: Horn Concerto & Bronze Horseman Suite
Bronze Horseman Suite: Ia. Introduction. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbd0dfe22c6ae61a308f5d1653dca196eef79e8ce2d75b2326a937a5a3ed0ed. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBLWD9506301 — a six-check JSON result.
Bronze Horseman Suite: Ib. On the Senate Square. Allegro
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Bronze Horseman Suite: Ic. Dance on the Square
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeff3e5a45eeb39d38c1f367607bdb3d35ca8e90445a42fed21ff7a7e0b75516. 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/GBLWD9506303 — a six-check JSON result.
Bronze Horseman Suite: IIb. Parasha. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f44b1eddf5b6344b99ed0d248a7bad7ee5e29680ebd88b5bc77486fda332c8a. 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/GBLWD9506305 — a six-check JSON result.
Bronze Horseman Suite: IIc. Lyric Scene. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a5a0343f37c406682bc1bf5560b8b501d80bdd1b6d7de22a97a400c0b3d088. 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/GBLWD9506306 — a six-check JSON result.
Bronze Horseman Suite: III. Dancing Scene. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc5f62d5df79d9cd32c53e39ac2e27d0ca65233fc37ba993489f99b0a4e94ff. 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/GBLWD9506307 — a six-check JSON result.
Bronze Horseman Suite: IVa. Fortune-telling. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f750c37960b94923497431d3350f9f163c1f21b895f54cb4c83356f02abe93. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBLWD9506308 — a six-check JSON result.
Bronze Horseman Suite: IVb. Dancing in a Ring with Dancing. Andante - Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15cfdca58b768b3c3325d11c1fee8db06367d5663c8ffd1b190654c96821c7c. 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/GBLWD9506309 — a six-check JSON result.
Bronze Horseman Suite: V. Meeting. Allegro agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ba4e3c2581194cef3ee487751cbd69302bb4e098ee01173aefc7d4c5e6643f. 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/GBLWD9506310 — a six-check JSON result.
Bronze Horseman Suite: VI. Waltz. Tempo di valse
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Bronze Horseman Suite: VII. Anticipation. Allegro molto agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa2fef5ec494072f24f585a8aa371930862419dd2dd3b47ca2ec4160cb64a40. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBLWD9506312 — a six-check JSON result.
Bronze Horseman Suite: VIII. Hymn to the Great City. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5273b9a94d01e4e27f1de1a2cc9d452dbe95393e3d1f6d0ea3141bfe55777d9b. 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/GBLWD9506313 — a six-check JSON result.
Concerto for Horn and Orchestra, Op. 91: I. Allegro
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Concerto for Horn and Orchestra, Op. 91: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3840f0311c5be3fab4baf71096da7db9352dbefea280a82369671642da951af9. 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/GBLWD9506315 — a six-check JSON result.
Concerto for Horn and Orchestra, Op. 91: III. Moderato - Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d5a74a3f66a55482d9270d77a93074defe4d09e74dc9b54c8124f7ef927807. 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/GBLWD9506316 — a six-check JSON result.
Respighi: Belfagor Overture, Toccata for Piano and Orchestra, Tre Corali & Fantasia Slava
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd82ed0096dbeefb62faf07103166d1d1b663ba73e0a4b74349c318c071ef2e8. 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/GBLWD9408805 — a six-check JSON result.
Respighi: Piano Concerto in A Minor & Concerto in modo misolido
Piano Concerto in A Minor, P. 40: I. Moderato - Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f12a80498d2be5f3113d1c998148c2c691ab12c55a7562899823274ed25141. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLWD9405201 — a six-check JSON result.
Piano Concerto in A Minor, P. 40: II. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4052ece933fb13f31f2a0d78149172be767033939e539c37fec8e2d5ad69385. 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/GBLWD9405202 — a six-check JSON result.
Piano Concerto in A Minor, P. 40: III. Presto - Andante
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Symphony No. 2 in E-Flat Major, Op. 63: I. Allegro vivace e nobilmente
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Symphony No. 2 in E-Flat Major, Op. 63: II. Larghetto
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Symphony No. 2 in E-Flat Major, Op. 63: III. Rondo
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Symphony No. 2 in E-Flat Major, Op. 63: IV. Moderato e maestoso
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Respighi: Concerto gregoriano, Poema autunnale & Ballata delle Gnomidi
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Concerto gregoriano, P. 135: I. Andante tranquillo
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Concerto gregoriano, P. 135: II. Andante espressivo e sostenuto
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Concerto gregoriano, P. 135: III. Finale. Allegro energico
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Korngold: Symphony in F-Sharp Major & Abschieslieder
Symphony No. 1 in E-Flat Major, Op. 8: I. Andante - Allegro moderato - Andante
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Symphony No. 1 in E-Flat Major, Op. 8: II. Allegro molto vivace
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Symphony No. 1 in E-Flat Major, Op. 8: III. Andante
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The Red Poppy, Op. 70: I. Heroic Coolie Dance
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The Red Poppy, Op. 70: II. Scene and Dance. I. Scene
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2911c9c0de15789f8be22ea291e20b9d9c5540861046e369c89b2beb97e675. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBLWD9303609 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0436a0276f6f96c896c31ab8d2f9e8cacc56ff89c473152b5c61a5cfa9ee5c8a. 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/GBLWD9303610 — a six-check JSON result.
The Red Poppy, Op. 70: VI. Russian Sailor's Dance
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Gliere: Symphony No. 2 & The Zaporozhy Cossacks
Symphony No. 2 in C Minor, Op. 25: I. Allegro pesante
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Symphony No. 2 in C Minor, Op. 25: III. Andante con variazioni
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The Zaporozhy Cossacks, Op. 64: I. Introduction
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The Zaporozhy Cossacks, Op. 64: II. The Cossacks write the letter then read it
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Symphony No. 3 in B Minor, Op. 42, "Ilya Muromets", I. Wandering Pilgrims: I. Andante sostenuto
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Symphony No. 3 in B Minor, Op. 42, "Ilya Muromets", I. Wandering Pilgrims: II. Allegro risoluto
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Symphony No. 3 in B Minor, Op. 42, "Ilya Muromets", II. Nightingale the Robber: I. Andante
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Madama Butterfly: Act II: Piangi? Perchè?; Un bel dì
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Tosca, SC 69 / Act 3: "E lucevan le stelle"
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Madama Butterfly: Act II: Un bel di vedremo
J'aime pas le classique mais ca j'aime bien
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Luisa Miller: Act II: The Intrigue: Scene III: Oh! fede negar potessi; Quando le sere al placido
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Don Giovanni, K. 527: Act II: Scene 2: Il mio tesoro
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Ich mag keine Klassik, aber das gefällt mir!
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Lohengrin, WWV 75: Act III: In fernem Land
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Werther: Act III: Pourquoi me réveiller?
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Je n'aime Pas l'opéra mais ça j'aime bien
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Best of Opera - Die 50 größten Opern-Arien
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