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 0xf459c4864163a3af14ff1f6e4456a5558cdddd99453df7d33dc7864210cf907f. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6f9f125-79e0-4966-af7f-9e31db735181.json and https://artists.proofprofile.net/proofs/artist/e6f9f125-79e0-4966-af7f-9e31db735181.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stölzel: Christmas Oratorio & Cantatas Nos. 1-5
Stölzel: Christmas Oratorio & Cantatas 6-10
Stölzel: Der für die Sünde der Welt gemarterte und sterbende Christus
Der für die Sünde der Welt gemarterte und sterbende Christus, Pt. 1: Mich vom stricken meiner Sünden
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 0x62d66e7f4eb972cd869d0a2743203a6a7501ace2265bbbe1c46d081520bb1ccd. 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/DEB209756001.
Der für die Sünde der Welt gemarterte und sterbende Christus, Pt. 1: Der Gott, dem alle Himmelskreise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a3ea3867b98afc7a9ae6bf63abb83f1dfebeb2a341aaf7e9763b09bc04b0af. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEB209756003.
Der für die Sünde der Welt gemarterte und sterbende Christus, Pt. 1: Gott selbst, die Brunnquell alles guten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2de30d97d026fd26563468a2b98c6b963b82933e5fafb9e2682deeb98459d2d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEB209756005.
Der für die Sünde der Welt gemarterte und sterbende Christus, Pt. 1: Drauf sagten sie dem Höchsten Dank
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd0e532f9d57800ea69f4484ee47ecd726e129baacf6b6078090d8ace8cd5b5. 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/DEB209756007.
Der für die Sünde der Welt gemarterte und sterbende Christus, Pt. 2: Ach Gott und Herr
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd8a825132e7d0baab159641e46a6eeaee95f17551cc37287a4df1c59167ae0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEB209756023.
Claudio Monteverdi: Vespro della Beata Vergine (Marienvesper)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574e68b47f5a09db482f8b4250239d761e52e71b84ec2e68a8eaeee31ad3634c. 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/DEN421113001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daed03c72f49b6e52b2b1801b2612406546da966e30925199550539598107ae. 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/DEN421113003.
Fux: Il Fonte Della Salute Aperto Dalla Grazia Nel Calvario
Knabenchor Hannover: Michaelisvesper mit Werken von Michael Praetorius
Musae Sioniae V: Komm, heiliger Geist, Herre Gott
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c789f0331779a3c8b36b64ff14672135345a1924bec5a3aad5421695c380ef. 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/DEN420902002.
Joseph I / Ferdinand Iii / Leopold I: Sacred Works
Schutz: German Requiem / Seven Last Words of Christ
Die sieben Worte Jesu Christi am Kreuz, SWV 478: Introitus: Da Jesus an dem Kreuze stund
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095330c4cba6b91f6a5a472630e3915531ffb453f92a79f26324f4a0abd08eb1. 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/HKI190146905.
Die sieben Worte Jesu Christi am Kreuz, SWV 478: Symphonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820e69b6fc26fa3a20e16f597d2f55e2463ef82721d6a5c2553ce9f72af0696c. 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/HKI190146906.
Die sieben Worte Jesu Christi am Kreuz, SWV 478: Und es war um die dritte Stunde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49459e5456119fea74259d94c88bcb2d8c87b6f62b78ef7b464c4a2e86c26da4. 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/HKI190146907.
Die sieben Worte Jesu Christi am Kreuz, SWV 478: Conclusio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682262353a67bf60406c37658a8532bc6ff8953b8350f7947d5905bcf3a4d4fe. 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/HKI190146909.
Bernhard: Geistlicher Harmonien & Other Sacred Concertos
A Guided Tour of the Baroque Era, Vol. 1