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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9e2f7f384c47861135f1fdd027daf2681fa05e24e5e91d186d16a035c7dbd4. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7a93642-0b39-4dd9-9ace-2947f84769a2.json and https://artists.proofprofile.net/proofs/artist/e7a93642-0b39-4dd9-9ace-2947f84769a2.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 → 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41441524193cc577e058cfd795952092bb0b1f3d7bac723db09f69b3236f1340. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117706382.
12 Études, Op. 10: No. 11 in E-Flat Major
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6 Moments musicaux, D. 780: No. 3 in F Minor (Allegro moderato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904ee455b0f45b5a032ee55e0d726b94d4e3b7de24fa1e730266f9467e9bc312. 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/GBAYC8704142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe054ca624f71bff83a77ed7a40e04df5d97e8a2dd434125cdc1cbae0fd0f52b1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8900719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23523c1ea287bf83bfe687e4735ed8d244164eecf2fea88d93c3a47e296e45ab. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9200246.
Goldberg Variations, BWV. 988: Aria (Andante espressivo)
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3 Etudes de concert, S. 144: II. La Leggierezza
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3 Etudes de concert, S. 144: III. Un sospiro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a46f3a391f9cced7f7f9981af9d257da3884bc48d03e5edbd1e48f33ce878d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRS999603008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc6c0645a26e393dabd6a51c2e9a1d488cd58211dbce54beb38b5883b3553e7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ111101907.
12 Romances, Op. 21: V. Liliacs (Allegretto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8954e442202dd44bd330af3f84c1a290a1844dca99816a1ccd9c576b4c67c37c. 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/GBAYC8901452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf654f1247e001cfd04e6b4d48da3f12883bd4f4b457fb67ae75496b579617c55. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8700614.
Diabelli Variations, Op. 120: No. 1, Theme: Vivace - No. 2, Var. 1: Alla marcia maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ff1ccde056cf73186c60bf7cd5c3dda7db2cf77bcd2be714c95b2ba7300812. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD0900014.
Preludes, Op. 28: No. 4 in E Minor (Largo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5efd3b021646de880af725d34bc6f7e2eed4c63ddd6b765213a4b079b8bf5e6. 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/GBAYC0500164.
Piano Concerto No. 23 in A Major, K. 488: II. Adagio
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2 Konzertetüden, S. 145: I. Waldesrauschen (Vivace)
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Six Piano Pieces, Op. 118: No. 2, Intermezzo in A Major (Andante teneramente)
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Songs without Words, Op. 62: No. 6, Allegretto grazioso 'Spring Song' (Frühlingslied)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a42ccc033ddce18b5203044ea3cba157bb21bff3227adb7f9c9f248cedf7933. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRZ207103706.
3 Intermezzi, Op. 117: Intermezzo in E-Flat Major
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Faschingsschwank aus Wien, Op. 26: II. Romanze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f20f4777c5808e0afd7173b2e803135ba6220fe8eaaf906e44cbd6622996d4. 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/GBAYC8700640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6c2d2f098fe9daf49312ddf843e838a62ddb68764422731d03f0faded64d2b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBAYD8900689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916cd480b2807c886361982178c302f6af6823d61e3432a28b44e53856ac2b8f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ119200850.
Preludes, Op. 28: No. 15 in D-Flat Major "Raindrop" (Sostenuto)
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Nocturnes, Op. 27: No. 2 in D-Flat Major (Lento sostenuto)
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Peer Gynt, Op. 23, Act IV: Prelude (Morning)
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Piano Concerto No. 2 in F Major, Op. 102: II. Andante
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Canon and Gigue in D Major, P. 37: I. Canon
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Piano Sonata No. 8 in C Minor, Op. 13 'Pathétique': II. Adagio cantabile
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Variations on a theme by Haydn, Op. 56b: Var. IV. Andante
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf359146a3677e5a630ff191b5b8cd7f8b79d066fee88cfe464f3db54663107ea. 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/GBAYC8801306.
L'Arlésienne Suite No. 1, GB. 121: III. Adagietto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad587f2e699b4f72428990e3ec7161675ad79b573e3f338bb4e64ddc0d1ed97. 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/GBAYD9100280.
Peer Gynt Suite No. 1, Op. 46: Morning Mood
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Swan Lake, Act II, Op. 20, TH 12: No. 13, Dances of the Swans, Pt 4. Allegro moderato "Dance of the Little Swans"
Kirov Opera and Ballet Theatre Symphony Orchestra
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Swan Lake, Act II, Op. 20, TH 12: No. 10, Moderato
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Swan Lake, Act I, Op. 20, TH 12: No. 2, Waltz. Tempo di valse
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Piano Sonata No. 11 in A Major, K. 331: III. Alla turca
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Goldberg-Variationen, BWV 988: Variation No. 2
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Piano Sonata No. 3, Op. 2 No. 3: III. Scherzo. Allegro
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Piano Sonata No. 14, Op. 27 No. 2 "Moonlight": II. Allegretto
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Octet in F Major, Op. 166, D. 803: IV. Andante - Un poco più mosso - Più lento
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ca2cd5a003de32ea93a8ab28611e03bdd284131d2c9675b017cc6dbc7003a6. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1529176.
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
Waltzes, Op. 34: No. 1 in A-Flat Major, Vivace
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Saint-Saëns: Piano Études, Opp. 52 & 111
Franck & Lazzari: Sonatas for Violin & Piano
Saint-Saens: Musique de chambre avec vents (Saint-Saens: Chamber Music With Winds)
Cavantine pour trombone et piano, Op. 144
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Petite colline de sable - The Little Sand Hill
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Les contemporains écrivent pour les instruments à vent : Le hautbois (Mono Version)
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21 Hungarian Dances, WoO 1: No. 1, Allegro molto
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The Nutcracker Suite, Op. 71a, TH 35: I. Ouverture miniature. Allegro giusto
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Swan Lake Suite, Op. 20a, TH 219: I. Scene No. 10 from Act II - 2nd Version
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Saint-Saens: Le Cygne - Fauré: Après un rêve
Carnival of the Animals (version for cello and piano): Le carnaval des animaux: XIII. Le Cygne
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Maurice André: Le trompettiste du siècle
Orchestral Suite No. 3 in D Major, BWV. 1068: II. Air on a G String
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6 Songs without Words, Op. 30: No. 6 in F-Sharp Minor 'Venetian Gondola Song' [Barcarolle]
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Women At The Piano - An Anthology Of Historic Performances, Vol. 3 (1928-1954)
Saint-Saens: Les 2 sonates pour violoncelle et piano
Saint-Saens: The Swan from The Carnival of the Animals