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 0xdde5c0e1db1fa06150f8c1f1200423a132cc9468ab3357d685d23ff4c0efc312. 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/7898d467-81ed-47d5-ad5a-12e074098735.json and https://artists.proofprofile.net/proofs/artist/7898d467-81ed-47d5-ad5a-12e074098735.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin Concerto, Op. 33: I. Prelude: Largo - Allegro cavalleresco
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 0xc59b20a18b21b7211223928e40143585ec408ede59f3c430bbecc09f53cdfd0b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVAF1800101.
Violin Concerto, Op. 33: II. Poco adagio
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Violin Concerto, Op. 33: III. Rondo: Allegretto scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fb0d6d21fbb8d69e3c852ce392a7cef41d63bf327216766ccb557a3c7fcf9c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVAF1800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6decb70d6972648d33bb28fd8239378be4e81f8e0a68a51b762b95a4d1981d4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVAF1800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07dd713af750a10c8dc82313264dfcd4d1a62a4a14dcde4c62aab860a734247. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVAF1800105.
Clarinet Concerto, Op. 57: I. Allegretto un poco
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Clarinet Concerto, Op. 57: II. Poco adagio
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Clarinet Concerto, Op. 57: III. Allegro non troppo - Adagio - Allegro vivace
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Tchaikovsky: Piano Concerto No.1; Prokofiev: Piano Concerto No.3
Piano Concerto No. 3 in C, Op. 26: 1. Andante - Allegro
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Piano Concerto No. 3 in C, Op. 26: 3. Allegro ma non troppo
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Swan Lake, Op. 20, TH.12 - Arr. for piano by Earl Wild: Dance Of The Four Swans - Pas de quatre
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Piano Concerto No. 1 In B Flat Minor, Op. 23, TH.55: 1. Allegro non troppo e molto maestoso - Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48da2a9c9a6a0b979fe929aea7ee97eb122532758f6b238655be9f4cde0d57dd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071400561.
Piano Concerto No. 1 In B Flat Minor, Op. 23, TH.55: 2. Andantino semplice - Prestissimo - Tempo I
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Piano Concerto No. 1 In B Flat Minor, Op. 23, TH.55: 3. Allegro con fuoco
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Suite bergamasque, L. 75: III. Clair de lune
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The Well-Tempered Clavier, Book 1: Prelude No. 1 in C Major BWV 846/1
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Nocturne No. 2 in E-Flat Major, Op. 9 No. 2
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Orchestral Suite No. 3 in D Major, BWV 1068: II. Air "on the G String"
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Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf476438eb2c1a020f55b3019dd9a447f2b185e0a3572a117ee3321bbcf2313e3. 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/GBF077230201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bcd0d7305f8908b602522e02202f19b540f783f355147c5896de7189827ba4. 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/DEN961902670.
La traviata / Act 1: Libiamo ne'lieti calici
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Come, Sweet Death, BWV 478 (Arr. for 5 Cellos)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ba6473047ac397ceee9e6bf535cd4cffce7028abcd361c9dc68e12f058ee9d. 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/GBF071504650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4ad09630cef62178038dd8d5029dcdc50c04f4c42d4af81b5906086a24440c. 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/NLA509311913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15d3eaf0841479f782c956e4ef813d0b07135d36b6238dd93c6d2540c58eb0d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961700733.
Fantasy on Polish Airs, Op. 13: Largo non troppo
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Concerto grosso in G Minor, Op. 6 No. 8, "Christmas Concerto": Adagio (Arr. Davies, Gordon and Tognetti)
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Après un rêve, Op. 7, No. 1 (Arr. Piano)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b92c5cf2bfcd24bcd6ffc89f2f2a318fbb10731eb7bbab93127d47f499d2bd9. 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/GBF071400531.
Cello Sonata No. 4 in C Major, Op. 102 No. 1: I. Andante –
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Canon and Gigue in D Major, P 37: I. Canon
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Concerto for Lute, 2 Violins and Continuo in D major, RV 93: 3. Allegro
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Variations on a Theme of Chopin, Op. 22: Variation No. 16 Lento
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b5fa8bc82e4a819a3572941273714cfdf2ffeb0b8f90979349ced416911221. 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/NLA507500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0666dc1f6328fc761a84e3966462ebdf36f740ca826dfa3ea3f71d48b56bb082. 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/DEN961801620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56c95e2282112ec1902909a81a275ede48e5e34c017c47c35cb3c2a9a357f0c. 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/DEN961700740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5f316ed5bbe0bbb6dfff9b092d1779baf9fd2e14d34a1214fdecade5eda609. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM71723010.
Puccini: La fanciulla del West, SC 78 (Live)
Concours de Genève, Breguet - Gilles Vonsattel
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Vamos A Pasar La Tarde Con Música Clásica
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Piano Concerto No. 21 In C K467 "Elvira Madigan": 2. Andante
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ab918877352034aefe7370b16ac6280476683cc07b54431e8604dd6020f408. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM71001508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943f74d3c38ea3418ddb39c71bebbd20b2c4848c18fe500f848af43f071508ee. 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/ITB280400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a761750fd3f09fee0112beb9af0cc297376e3284e2802ae67fd11514576db33. 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/DEN961902871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66149b85d30baa7e42d95e7e4ae1401b5a85e5002d209ff09db1c137a4c7b795. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191411406.