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 0x202847aa12a6f87f8a9c9a4b05063b1d7b93b667ddcf2fbee001aa8a4328c252. 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/37ff7c1c-e319-431c-9822-27e4a5ba69e0.json and https://artists.proofprofile.net/proofs/artist/37ff7c1c-e319-431c-9822-27e4a5ba69e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Guided Tour of the Romantic Era, Vol. 9
Orphee aux enfers (Orpheus in the Underworld): Overture
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 0xefc76fd8dc4fd7948e8d8e47e5ff9fac19b57a8bb11000cf95f1dcb54f9d8b8f. 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/HKI199248107.
Chefs d'oeuvre de la musique classique française
Beethoven: The Conquering Hero – Complete Works for Cello and Piano
Sonata for Piano with Horn or Cello in F Major, Op. 17: II. Poco adagio
Sonata No. 3 in A Major, Op. 69: III. Adagio cantabile – Allegro vivace
Walton & Britten: Works for Violin & Piano
Nocturne #20 in C Sharp Minor, Op. Posth.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53818bf7a799492c76e5f90e5fd24cc64b74cb62b0744d6bf53bb11b2dd1cae8. 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/US3CR1501154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5819f4fc5b890c8aac613c05b9317435561335e550d98ccafd030a3781770456. 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/US3CR1501163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4840c1065fb8e1bdf20a72b2f372db949540cda294b822b05d7a20c5aee6a2c7. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/US3CR1501142.
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 0x624eaa2b64404c39ef453d7f8bee94edda0990321eb6e8fe679765825d93a296. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US3CR1501145.
Waltz, Op. 64 No 2 (Arr. for Cello and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6535b4bb936b1cf09df90dfbbe4ae105e01eb45600f3cb2257e8e107e5579f1. 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/QMVCZ1200002.
Nocturne, Op. 9 No 2 (Arr. for Cello and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a7e4412c142a9733b839e1ded1e599987ebec2d4afbdb53ec65930d5262a82. 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/QMVCZ1200006.
String Quartet No. 2 in D Major: III. Nocturne (arr. W. Primrose)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c1869addea4e4604d7fa1402f12f54ca4462f53b807ba3e1fe27ea47249c1e. 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/HKI190581901.
5 Lieder, Op. 105: No. 1. Wie Melodien zieht es mir (arr. W. Primrose)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc390858600eb08c3ccb99e9fb20439ea2ee2e7ecfd858608c2fafbe01fe7b8dc. 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/HKI190581917.
Violin Recital: Koljonen, Elissa Lee - Chopin, F. / Elgar, E. / Rachmaninov, S. / Kreisler, F. / Liszt, F. (Heartbreak - Romantic Encores for Violin)
Nocturne No. 20 in C-Sharp Minor, Op. posth. (arr. N. Milstein)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4a3f53b65c75e912be9a912a8f741485c6c43cb739dc392791f132c646f17a. 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/USB8U1032096.
Salut d'amour, Op. 12, "Liebesgruss" (version for violin and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e2077927c826d25a07c1396f73871a5f9379aba1e7d1f536bf127b7ffe5fa6. 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/USB8U1032097.
14 Songs, Op. 34: No. 14. Vocalise (arr. M. Press)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407e0979a17c3677623cf4c796139ddd2dd9d05f47aa6f19a46f0a6a7bc42d3f. 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/USB8U1032098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e1c11f7fbe415e5536b5aa513eed3bc5ed2b4dc0793cd08f8ba16ca2ad3c80. 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/USB8U1032099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df16e01d79b31ae5b1ca911d8d93c4433abd5ba517395db82351cd4d61592ec. 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/USB8U1032100.
Consolations, S172/R12: No. 3 in D-Flat Major: Lento placido (arr. N. Milstein)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe250945b868c4ecf4747a31aa2c44ef7fda67ae3112bb1d6ad448518fa5c6fff. 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/USB8U1032101.
Thais, Act II: Meditation (arr. M. P. Marsick)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894306956ce759095aea80b536cf07e49ce9dcb5397a399de82a183cf3f731eb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USB8U1032103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d2956b2f44d6c855690cec649640296ded78c765820e41127ffca49e290729. 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/USB8U1032107.
Gianni Schicchi: O mio babbino caro (arr. E.L. Koljonen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18c831903fda35f12aadc6580273637b1db2dcdb549db62ad66edac917cc12c. 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/USB8U1032109.
Contemplation (after J. Brahms' 5 Lieder, Op. 105)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512647b2169865f43a61f385c1c388da50a7a2a9e4287703ecbfe2271876b1f0. 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/USB8U1032112.
6 Morceaux, Op. 51: No. 6. Valse sentimentale (arr. M. Press)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2749e218b245a90a1c190f667a4f2b8661ed5bd5634126caa553845e2a125445. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:57:26Z), 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/USB8U1032104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb0d7d3f77177621e44e80d22a0e537a819047e752fff5426c88aaf8f3169e9. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USB8U1032102.
Nocturne No. 8 in D-Flat Major, Op. 27, No. 2 (arr. A. Wilhelmj)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e1eba0ddb93ed07550bdb679623852fb4b4fe5ac5c1ae9dfd73a636128a54. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USB8U1032105.
Pavane pour une infante defunte (arr. P. Kochanski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6ecc6f7b8855e9a535d9dfed19bba92501bbbfc8f311eb0cb2130342a19536. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USB8U1032106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae07cbf14d16a85f662f83b84b1ab3598756bd60c867446846ca27c01cf5f74. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USB8U1032108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68487eb3cf8eb14878b130fb8a0cfa54b6d17c8c2cf74760d1bcdbefc6b6d478. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USB8U1032110.
Zigeunerweisen, Op. 20: I. Moderato - Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672f2aa8f0116be5a08f7a1923ceb7d49884183e94cf988fc06cf5a54bc276ec. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USB8U1032111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6797ee4cd7a3aba13721a89c378b2831d17cd8625c9cb634de04cde45ce1b23e. 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/USL7S0710100.
Lekeu: Violin Sonata / Chausson: Concerto for Violin, Piano and String Quartet
Li, Chuanyun: Salut D'Amour - Strauss Violin Sonata and Favourite Encores
Bruns, V.: Bassoon Sonatas No. 2 and 3 / Kleine Suites Nos. 1 and 2
Corigliano / Copland: Violin Sonatas / Dello Joio, N.: Variations and Capriccio
Prokofief: Violin Sonata in F Minor / Violin Sonata in D Major / 5 Melodies
Liebermann, L.: Flute Trios Nos. 1 and 2 / Flute Sonata
Elgar: Violin Sonata, Op. 82 / Fauré: Violin Sonata, Op. 13
Three centuries of Thomas Moore for Tenor and Piano