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 0xd846d282c06511a454e87fd454d0c903ca73b92eb2f0ced74b56ce5b67245753. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e1d9f28-2ee3-42ef-b8fd-aa885d828fee.json and https://artists.proofprofile.net/proofs/artist/1e1d9f28-2ee3-42ef-b8fd-aa885d828fee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Norbert Moret: Concerto pour trompette, pour cor et suite à l'image de temps
Danzi, Pleyel & Salieri: Sinfonia Concertante
Octet in F Major, D. 803: III. Scherzo. Allegro vivace
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 0x70dee52fe616dfbf9548a76f67e1170867a45cadf6c1566de8b9b80381b0798d. 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/FRU621943803.
Octet in F Major, D. 803: IV. Andante - Un poco più mosso – Più lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47f96752b6b25ff6d1b3d60aeb77c8eddada9284cd97ec370d483c4f21edab4. 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/FRU621943804.
Mozart: Clarinet Quintet K. 581 "Stadler" & Horn Quintet K. 407
Mozart: Clarinet Quintet in A Major, K. 581 "Stadler": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25cf9383ae925bcfee4e61221b0e0a0ad753af52eb781249358fb8e65a535d7. 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/DEC628800404.
Mozart: Clarinet Quintet in A Major, K. 581: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d22f8287cf9f6f1b6f8fad2bd332b0f65c844911e053601b0564c008962281. 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/DEC628800405.
Mozart: Clarinet Quintet in A Major, K. 581 "Stadler": III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914f9d5680d2e2d1c7e8bb5050aac2e5fb577761cfdf0fec76625ea723974703. 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/DEC628800406.
Mozart: Clarinet Quintet in A Major, K. 581 "Stadler": IV. Allegretto con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7a2770fb11129363461e5aa7d2f472f996eeb2fb0b6feddc13a742b3aa3757. 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/DEC628800407.
Mozart: Clarinet Concerto in A Major, K. 622 & Sinfonia concertante in E-Flat Major, K.297b
Mozart: Clarinet Concerto in A Major, K. 622: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49fdc91d3583a938b12151712d9a96826100db423ab508015116ebcdc084b0f. 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/DEA349000916.
Mozart: Clarinet Concerto in A Major, K. 622: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd4421f367349ebbcf39f73c0f27e74656ae1780dedfadc2086f5489e318b2d. 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/DEA349000917.
Mozart: Clarinet Concerto in A Major, K. 622: III. Rondo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaa392cfdef4049d7c0f80d3a48e7907b227944bb64455c34414ed03060e98b. 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/DEA349000918.
Mozart: Sinfonia concertante for Oboe, Clarinet, Horn and Bassoon in E-Flat Major, K. 297b: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe3856d8ea666b1a198a61a5d19ab1735099f372500e5ecfa4576b408459b9. 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/DEA349000919.
Mozart: Sinfonia concertante for Oboe, Clarinet, Horn and Bassoon in E-Flat Major, K. 297b: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6978ef36cde4554d5c8665e79847fd9415afcc2c8bab2545b82f620b10bdbc9. 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/DEA349000920.
Mozart: Sinfonia concertante for Oboe, Clarinet, Horn and Bassoon in E-Flat Major, K. 297b: III. Andantino con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b2934ef60ca3bf2e03568fe6a6bbbb5f61b7361e063331f9373c190c750237. 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/DEA349000921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49fdc91d3583a938b12151712d9a96826100db423ab508015116ebcdc084b0f. 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/DEA349000916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd4421f367349ebbcf39f73c0f27e74656ae1780dedfadc2086f5489e318b2d. 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/DEA349000917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaa392cfdef4049d7c0f80d3a48e7907b227944bb64455c34414ed03060e98b. 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/DEA349000918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe3856d8ea666b1a198a61a5d19ab1735099f372500e5ecfa4576b408459b9. 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/DEA349000919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6978ef36cde4554d5c8665e79847fd9415afcc2c8bab2545b82f620b10bdbc9. 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/DEA349000920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b2934ef60ca3bf2e03568fe6a6bbbb5f61b7361e063331f9373c190c750237. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/DEA349000921.
Konzerte für 2 Klarinetten und Orchester op.35 & op.91, Konzert für 2 Klarinetten und Orchester Es-dur Op.35: II. Adagio
Württembergisches Kammerorchester Heilbronn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddef43f2bf93fec795367a44f6f6817c2838524d0e2c7d66f3ef57026c467985. 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/DEC628800412.
Schumann Project: Complete Chamber Music With Piano
Three Romances for Oboe and Piano, Op. 94: II. Einfach, innig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8feca3c09da6cc1fa9c04d0b71141f7dccfd462b686f088dc990a604768301f4. 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/FR50X0712102.
Märchenbilder, Op. 113: I. Nicht schnell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903d887542b2da542b7ec6188c6280e37af2f73ca82cdf157a22bc886c30732c. 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/FR50X0712112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee60559eac3ee46f1af0f37908804c8af97eb3bf7a51d2add895dd3f160ffda3. 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/FR50X0712113.
Märchenbilder, Op. 113: IV. Langsam, mit melancholischem Ausdruck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993ce51915440cfbd04fa636f8d6cbb7104d949c7c04eefe0c7a89b5ed074b95. 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/FR50X0712115.
Schubert: Der Wanderer an den Mond, Op. 80 No. 1, D. 870
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d3a6e85723060745addca0ed9efd3ffc5e0c430059e60915af385808795c4b. 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/FRZ118500740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da4d637751847b60f8bbc70f967eb8b766bb834b307c5522d95edef2b6535f4. 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/FRZ118500750.
Schubert: 2 Lieder, Op. 43: No. 2, Nacht und Träume, D. 827
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88fed85689b16eccdd2ef8aa088b0e1a0d861a5c8b2eac9618156b0e32b2b2. 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/FRZ118500770.
Schubert: Suleika I, Op. 14 No. 1 No. 1, D. 720
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9491d62c7b773c01e0fd8a565c15d689dbdfcb4711528e77850f39a74389559f. 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/FRZ118500780.
Schubert: Auf dem Strom, Op. Posth. 119, D. 943
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d2b4e4090896af47dda6c9e2788e42a47f79a541f05ebc8d913a2a836ffd4a. 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/FRZ119300910.
Schubert: 3 Lieder, Op. 19: No. 3, Ganymed, D. 544
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3217d3e06adf467ba7509fca15c8796bcc4a2070a9ed4a59f3a90149f91fa5cc. 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/FRZ118500790.
Schubert: Du bist die Ruh, Op. 59 No. 3, D. 776
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7a30767c6608fe5a6fc3c297de85f347e0a897904c96b5c821d477252869c9. 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/FRZ118500880.
Schumann: Fantasiestücke, Kreisleriana, Waldscenen… - Klavierwerke & Kammermusik VI
R. Strauss: Concertos for Wind Instruments
Schubert le Voyageur: La Folle Journée 2022
Litanei, D. 343 (Arr. for Cello & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287081b0d3124f03cd588c39b02dc038c5304642e1c3564f4724c918053c5f3b. 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/FRU622161408.
Schumann: Klavierwerke & Kammermusik III
Klaviermusik von Wolfgang Amadeus Mozart
Feather, Breath, Mirror: Music By Eric Chasalow