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 0xd13cdfee2fffc0b603a42afd8220570319d77da29f733c986e19f639d6af8984. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84101959-b534-4393-af85-bda26b7adf2e.json and https://artists.proofprofile.net/proofs/artist/84101959-b534-4393-af85-bda26b7adf2e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Rachmaninoff: The Bells, Op. 35 - Taneyev: John of Damasacus, Op. 1
Mussorgsky: St. John's Night on Bald Mountain & Songs and Dances of Death - Prokofiev: Alexander Nevsky
A Guided Tour of the Romantic Era, Vol. 3
Beethoven: Die Ruinen von Athen, Op. 113 & Other Works
Sacred Masterpieces Stuttgart Gachinger Kantorei, Stuttgart Bach Collegium, Rilling
Janacek: Glagolitic Mass - The Eternal Gospel
Hallelujah - Great Choruses - Sony Classical Masters
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 0xa63b494ace4553a809e1488b4b0ea047fab43cac336b111e9a4e474d14025fac. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19928122 — a six-check JSON result.
Die Schöpfung, Hob. XXI:2: Part I: Die Himmel erzählen die Ehre Gottes... Dem kommenden Tage sagt es der Tag
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf780cc3b81d9f9f826839aef16dc42b7d8e288324bd7757f1c797e2a1c79042. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE470200146 — a six-check JSON result.
Bruckner: Symphony No. 7 in E Major, WAB 107 - Wagner: Das Liebesmahl der Apostel, WWV 69 (Staatskapelle Dresden Edition, Vol. 38)
Chorszenen und Konzertchöre in Rundfunkaufnahmen ab 1938
Die Meistersinger von Nürnberg, WWV 96: Silentium! Silentium!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925beb334e4510324cb2cbbc05be3a76e9342f2860b61c9f887212bfc3032cbd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD61703101 — a six-check JSON result.
Lohengrin, WWV 75 (Highlights): Gesegnet soll sie schreiten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e7f7a947768f8ce3d4fb1abb602183bbe7ed51d6a799af45f385a2961c7276. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD61703104 — a six-check JSON result.
Carmen, WD 31 (Highlights Sung in German): Diese Menge, im Gedrange!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004b915f359d5c4d95541434d2757870f19388669f5d230206090085b9b911cd. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD61703111 — a six-check JSON result.
Carmen, WD 31 (Highlights Sung in German): Habanera. Ja, die Liebe hat bunte Flügel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d756f56b604565583ad0754228a90a7a0e4f49e53cd1b027e8dab368545ee4. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD61703114 — a six-check JSON result.
Beethoven: Complete Symphonies Transcribed for Piano by Liszt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffb2028fa2ed1a57c0735a9014507a410ef7282557695e8cd825c3fd36a67bd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046701 — a six-check JSON result.
Regina coeli, K. 127: Quia quem meruisti (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12796fa9b0c1677e374d2bca0307a55c632fc6180785dd21e5d0b4eb0a86aa7b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046702 — a six-check JSON result.
Regina coeli, K. 127: Alleluja (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b558ca38b0ee824c5d08f675dc30ef96cfdf7d26dc6253df0d21e0cc4811f5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046703 — a six-check JSON result.
Vesperae solennes de confessore, K. 339: Laudate Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a55a79552e80740c58684bd6a8a8bc83beb03f812dc2de909b0427965fac97. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046704 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1365deb3c2a6fa9cd5c8c3e80bc5d90eca9711031a5fd17c655a3f2370187d1d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046705 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9931dc357c5c68c76e4f5413873df9f48336926c17b37104f77e48bb1ee347b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046706 — a six-check JSON result.
Exsultate jubilate, K. 165 *: Recitativo: Fulgat amica dies - (Aria): Tu virginum corona
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fb98ca164d565f3f8269dfabe86119491aacd96dc33919351d3c12d54ff23e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046707 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526f96c8fe87e1f70601e9c70fd57097e83b0d635d81d6321fb8293183f52e48. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046708 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab16c04d337d6a3c8046b05c86520fe5c42681b5c9075d33c7488f16bfc7857. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046709 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbe384b031515b29a1e1dc81661f9ae30e37f55a249851591e4ec6e173cb93c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046710 — a six-check JSON result.
Regina coeli, K. 108: Quia quem meruisti portare (Soprano, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc14df489a6043bf97045c791b03b1de3d096ddb2ff4dd75f39032deec2af8de. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046711 — a six-check JSON result.
Regina coeli, K. 108: Ora pro nobis Deum (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa819a9b1d9b4f775ca8fac82c4b7e75fb8d66cc825a2f82305ca8dc6d1951014. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046712 — a six-check JSON result.
Regina coeli, K. 108: Alleluja (Soprano, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36fa42fa3c386190e48019c9ab9ed9ef1e38d4bf304fdda0e53e3830e874bdc. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046713 — a six-check JSON result.
Leoš Janáček: Famous Male Choruses & Říkadla (Nursery Rhymes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24c14dbb719ee4377c3f3bdf3bb08175f11dcba91558eff2d0d0f19cca06cea. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046064 — a six-check JSON result.
Prodana nevesta (The Bartered Bride), Act I: Proc bychom se netesili
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84a64fe032cf2940fb1ebdb6eefcd8141b7f1f5578ba10c6bd0ab049abc20bd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046072 — a six-check JSON result.
Symphony No. 5 in C Minor, Op. 67 (Arr. for Orchestra by Gustav Mahler): I. Allegro con brio
Deutsche Staatsphilharmonie Rheinland-Pfalz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50cb4a70e400642e8051da814cd2ae345da6d792d1124decf194b7bb916661e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB262400141 — a six-check JSON result.
Symphony No. 7 in A Major, Op. 92 (Arr. for Orchestra by Gustav Mahler): I. Poco sostenuto - Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817513cc89bba874ddd3112bc160afea57d641d15cc245eced0051eac7995648. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB262400150 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84a64fe032cf2940fb1ebdb6eefcd8141b7f1f5578ba10c6bd0ab049abc20bd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1046072 — a six-check JSON result.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand" (Live)
Petr Fiala: Česká vánoční mše, Mariánská mše & Maria, růže tajemná