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 0x8893f6698faad0171cdaf9d7a795c053e250ef481176f064ee74a2fc3b38e14b. 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/7c857a82-16b0-4a2f-a4f3-459995c2e0e1.json and https://artists.proofprofile.net/proofs/artist/7c857a82-16b0-4a2f-a4f3-459995c2e0e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Durante, F.: Concertos for Strings / Harpsichord Concerto in B-Flat Major
Cello Concerto No. 3 in A Major, Wq. 172: I. Allegro
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 0x9de81bf338c8a43876b810baaff950623af5b1ca3d06f7ebf436241ac5f65d35. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB951792001.
Cello Concerto No. 3 in A Major, Wq. 172: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0cb0ee9b699101c90cac4efc802b79d0a91e08bb45101502a242c7815ec7f7. 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/DEB951792003.
Kraus, J.M.: Primavera (La) / La Gelosia / La Scusa / La Pesca / Olympie
Symphony in B-Flat Major, Brown I:B2: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a2125b8be2462d565cd8acd4380df6e1b59c4b41400091dea087a14d9db307. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEE471700307.
Symphony in C Major, Brown I:C13: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ab24bf7a97197ee69ce37da82976e6a6e338af7bee780d4314fb28e032f552. 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/DEE471700312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad6ac1469e2f2e32cc44ac5d228644c0596a3006205a42112cb4c90de3800c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USBC11100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa823929320981d6b9ff17f6ea4ce52e87a9e045beae2e8ed2f9099e8dfffc6. 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/USBC11100142.
Oboe Concerto in D Minor, Arr. for Harp and Strings: I. Andante e spiccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bef5ff1dea6b6035ef3023bb935217dca290bde94b3fc26db8276b6b8a036ed. 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/USBC11100128.
Oboe Concerto in D Minor, Arr. for Harp and Strings: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5582e2685a8e70be4a395d7ca39a447cddccd89e47a77f9bd8085806653d5f22. 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/USBC11100129.
Concerto in G Major, Op. 3, No. 3, RV 310: I. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6134dbbf9ca7a610087535fe9f519c13e84b05bdb9a16fde570107cfb7f2215a. 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/USBC11100132.
Concerto in G Major, Op. 3, No. 3, RV 310: II. Largo, cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dc68e7c395031105f53bb2412c2db6f09a82d64e9f8f2affd1e6bb0e033436. 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/USBC11100133.
Concerto in G Major, Op. 3, No. 3, RV 310: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd91e751028e887bedc01c87c7107772d9bd837c03b22f2a0355b01022dcc803. 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/USBC11100134.
Adagio in G Minor (Arr. for Harp and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8ed8bf5da771512658be1280af01480303035b976de72916cbeb2912c1f5c7. 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/USBC11100139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4cd9d69c728ac2a35a0061dbcd674d50e2b412b0555a79131b6d3ed3fae56e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USBC11100145.
Sonata in C Minor: II. Andante espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50fe566b79162010f5d347232b180c1fa007e4846e3a1b673ae5c8d2be8be75. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USBC11100146.
Friedrich der Große - Musik aus Sanssouci
Cannabich, C.: Fetes Du Serailles (Les) / Mozart, W.A.: Zaide (Excerpts)
Concerto in D Minor, BWV 1059: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f68196ece30c3fef37279236d790aaeb27e61363d1eaa1865121867dce67b1e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DES381919001.
Concerto in D Minor, BWV 1059: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52730b5abad12bd1bfe5b2eaf6d6235fc24dc8250448aafbe8763cf829e993a1. 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/DES381919002.
Concerto in D Minor, BWV 1059: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60af207f9fb939e28a49980515b963d006af9eda0ccdf34e538ce6c13dacd572. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DES381919003.
Cantata "Weinen, Klagen, Sorgen, Zagen", BWV 12: Sinfonia. Adagio assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebda6feb40235d1c7bf7fbc49ee42e1d0d001960e53908972b428f864db9ba1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DES381919004.
Concerto in D Minor: I. Andante e spiccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb1b29cd334ffddfbeb50fc155c7bce16296c748fd439b0dc826e6ea64f6b82. 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/DES381919005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a5edcea9ba40d55166a96c439cae83f47a82e6f6d755ac7a5a3f4d154ea76. 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/DES381919006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9803751f9217891563e1d3ca595f7e8246c7ae67f0232d8063f67b3fd973d9f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DES381919007.
Cantata "Ich hatte viel Bekümmernis", BWV 21: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec268dba62957fa57af778c2bba7fe8b51bbb51e45bdaa0f80af29411d74660a. 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/DES381919008.
Concerto in F Major, BWV 1053R: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0d2753328d32454ad8a50c3a7f111f8518d53b883d5c99f4db2d860e5dfa1e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DES381919009.
Concerto in F Major, BWV 1053R: II. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa05cd844279ba72e95f5355f62819d636cbcf83743dd6f81e480ede42e5898f. 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/DES381919010.
Concerto in F Major, BWV 1053R: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a9419c4dbb3982eea2037cef4045542df3fc8b002488bf90660b010478f1dc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DES381919011.
Concerto in A Major, BWV 1055: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e8328b67dfc19fb73aca0dda443e1601d4a579a4721665301b190247628dc6. 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/DES381919012.
Concerto in A Major, BWV 1055: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb58cc340252a0ccc9acd659647d34e2399b60bd112acb889d74ba9a2312c938. 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/DES381919013.
Concerto in A Major, BWV 1055: III. Allegro ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2bd799ce5ff423b4583efd57431bb54cd7a3d229c22904e6d7ece5c1a87aeb. 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/DES381919014.
Symphony No. 26 in C Minor: II. Andante arioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbaaca9bca2d1d8ad87ba95930e77427776d857fff4ee7fc5ed1ff968f3fa00. 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/DEE471500367.
Symphony No. 26 in C Minor: III. Menuetto - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0595f5104a96c223cddacfcff8263e87bee41a518665c4f6f1e75683284f83. 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/DEE471500368.
Symphony No. 34 in D Major: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9affccaefd3848901f62ab321331b54432f9126aa6680c81dabb225174c6573b. 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/DEE471500377.
Sterkel: Symphonies Nos. 1 & 2 / Ouverture à grand orchestre
Mozart, Haydn, Cimarosa , Salieri Arias 'Liasions'
Eichner, E.: Symphonies - Opp. 5, 6, 7, 11
Overtures For 2 Horns, 2 Oboes And Strings / Overture No. 2 In A: 2. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390b41e38cf27c5da1337d804735b93e050bdf65c2917b7035c819bdca37a1e1. 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/DEN960402052.
Mehul, E.-N.: Irato, Ou L'Emporte (L') [Opera]
Haydn, M.: Requiem in C Minor / Missa Sancti Joannis Nepomuceni / Te Deum in D Major
Concours de Genève, Breguet - Ryoko Yano
Concerto Koln (20 Years) - Portrait of an Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390b41e38cf27c5da1337d804735b93e050bdf65c2917b7035c819bdca37a1e1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEN960402052.