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 0xbbc763edb5f2c4adc3510b84e090f6eda1cda9a9c61002cd2bd5ed205860fb78. 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/a1df51db-e33b-477a-9a9d-d7912991c333.json and https://artists.proofprofile.net/proofs/artist/a1df51db-e33b-477a-9a9d-d7912991c333.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Milken Archive Digital Volume 8, Digital Album 3
Serenade for 13 Wind Instruments, K361, "Gran Partita" (Third Movement - Adagio)
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 0xdd563869fa3c2252cdf6261c583f4185760dfcb8bccdb18fddc3d3ca4820d0d2. 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/USX761320803.
Horn Concerto No. 4 in E flat major, K495 (Third Movement - Rondo: Allegro vivace)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a80c4581b72614313dd99c08d0add6803c2258677fa4299e2ac800b07dd8df9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBAJE0602766.
Clarinet Concerto in A major, K622 (Second Movement - Adagio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba26c9dac24ad3ebf57859e1876c8dbafc282cbe788443211ae37a8fb7b8d5d5. 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/GBAJE0602768.
Weinberg: Piano Concerto No. 2 / String Quartet Op. 55 / Shabbat Ba'Aretz
Lo Mejor de Enrique Bátiz, Vol. 4: Manuel M. Ponce
De Falla: The Three-Cornered Hat & Nights in the Gardens of Spain
El sombrero de tres picos, Pt. 1: III. Danza de la molinera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbeab5189cf97d813639a4f68f187fcb1fc6e99815bd12e40353f4cfe4d3d533. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBASH2062503.
El sombrero de tres picos, Pt. 2: II. Danza del molinero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d87befbf5d488f83f4e5fca7ae90900c8ec0fce5d6f220d86de5d3cec2771c7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBASH2062506.
Noches en los jardines de España: I. En el Generalife
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372939f9df2a2908afe49c7cff030622515bc64fed60e4c2fc1444148229375d. 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/GBASH2062511.
Noches en los jardines de España: II. Danza lejana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5daead268809224e3b7ce1e82086dbda4e9660bf9e88d3ab2f82216ffcba2d0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBASH2062512.
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
Noches en los jardines de España: III. En los jardines de la Sierra de Córdoba
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Musica Mexicana Vol. 3: Halffter, Moncayo, Ponce, Revueltas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a3efb14422c6ed2e0635b395b11a8649e394503363cd771b5cc8bdbecf3918. 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/GBAJE0614684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dc68c99ad8c71e9d2cae845db84669ca955a937452c43b111f11085f9fe729. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA560986301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a264ab7cf26d3ca0e9a15c7e1157ef1549079cfec6987c679400dddda2746c. 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/QZUD82300040.
Piano Concerto No. 1 "Romantico": I. Allegro appassionato
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0016b3fd234057f212db242a15820ffc50932784ae5ec734e5c1c0ca169da270. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUD82300049.
Piano Concerto in A Minor, Op. 22: I. Allegro moderato
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Piano Concerto in A Minor, Op. 22: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fca8acbb3bd65af97f8984bc963ce32356fc93863146022383cfd9be64bcc45. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUD82300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ab0bf7c1e7e898f7526fe9f284ee118d05ea7a05106109164e182e938a9c48. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUD82300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8026c6aae5330e196f97519bc8017c93147adeb6403b3fb6327dca47144b247c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUD82300042.
Piano Concerto No. 1 "Romantico": III. Finale. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8265b24b32773d2caf9d6485b20aa0e54916387f5e1420a8117eb9fd75a670f1. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUD82300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ec920279c8745ba819b12f54f6641a30c49bdc6db0c82a606554b4c5cf877e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUD82300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201ce453d4f71fc513d5db1ac10b104b4e12c6bfa9f33346e47a8217103c70eb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUD82300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104eb18be40ca4a8c625ddebad6a07da212ad654b0587071c8296b01e019f3c5. 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/USB801067608.
Préludes, Book 1, L. 117 (Excerpts): No. 5, Les collines d'Anacapri
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Suite bergamasque, L. 75: III. Clair de lune
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b49b4ba19c150f9a85df8621bc1c20bd34194152d4750f6ca2d77c269edc163. 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/USB801067611.
Préludes, Book 1, L. 117 (Excerpts): No. 7, Ce qu'a vu le vent d'ouest
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Préludes, Book 2, L. 123 (Excerpts): No. 12, Feux d'artifice
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Suite in G Major (Excerpts): I. Les tricotets
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4057e818e49cc889d17c10c783f507716bc48feb9a521af6f0a2d05499395440. 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/USB801067620.
Miroirs, M. 43: No. 4, Alborada del gracioso
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Préludes, Book 2, L. 123 (Excerpts): No. 7, La terrasse des audiences du clair de lune
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Suite in G Major (Excerpts): IX. L'egyptienne
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Préludes, Book 1, L. 117 (Excerpts): No. 2, Voiles
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Préludes, Book 1, L. 117 (Excerpts): No. 10, La cathédrale engloutie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c3c41fec989e6ef2aa6e78d6ecaeb6fc4299dfdae9dafa389ea3d026b6f46b. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USB801067614.
Préludes, Book 2, L. 123 (Excerpts): No. 2, Feuilles mortes
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Les Indes galantes: Menuets I & II (Arr. for Piano)
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Préludes, Book 2, L. 123 (Excerpts): No. 3, La puerta del vino
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Estampes, L. 100: No. 2, La soirée dans Grenade
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Pavane pour une infante défunte, M. 19 (Version for Piano)
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Final Thoughts: The Last Piano Works of Schubert & Brahms
Russian Recital: Mussorgsky, Prokofiev & Shostakovich
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce514d248553a20b6160c30bd3df1fdd54a2269acae993258e5d79f09476335e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX2831301815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb441441d3cdcb4e0d29a4fec20d1ae48e5d708b7adb6a51ed08e0ee4c0684ece. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX2831301819.
Brahms: Piano Sonata No.3 / Fantasies / Piano Pieces, Op. 119
Brahms: Piano Concerto No. 2 / Piano Sonata No. 2
Beethoven: Piano Concerto No.5 "Emperor" / Choral Fantasia
Albeniz / Soler / De Falla / Granados: Piano Espanol
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Ponce: Concierto del Sur; Piano Concerto; Violin Concerto
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Concerto for Violin and Orchestra: I. Allegro non troppo
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Concerto for Violin and Orchestra: II. Andante espressivo
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Concierto del Sur: III. Allegro moderato e festivo
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Tchaikovsky: Piano Concerto No.1 - Rachmaninov: Rhapsody On A Theme Of Paganini - De Falla: Nights In The Gardens Of Spain
Mozart: Violin Sonatas, K. 301, K. 378, K. 380 and K. 526