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 0x1695aba351eca2c7a5d1f85eafb343d0d537fed7839c13ca295a0e7209c448e5. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f59746af-6d0b-4d8e-a8d1-41907eb3e634.json and https://artists.proofprofile.net/proofs/artist/f59746af-6d0b-4d8e-a8d1-41907eb3e634.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Kantate zum 21. Sonntag nach Trinitatis, BWV 38 "Aus tiefer Not schrei ich zu dir": I. Chor. "Aus tiefer Not schrei ich zu dir"
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 0xd948de08ee077cd13ec5c0e9095063f404ad7a923c3811d9b1e61da5ee69c521. 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/CH9211100110 — a six-check JSON result.
Kantate zum 21. Sonntag nach Trinitatis, BWV 38 "Aus tiefer Not schrei ich zu dir": V. Arie. "Wenn meine Trübsal als mit Ketten" (Terzett Sopran, Alt, Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdddd02fda746dd4c15de8bbdfc4e9eb03151727aa6862d964e688de059a4a1. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/CH9211100114 — a six-check JSON result.
Kantate zu Estomihi, BWV 159 "Sehet, wir gehn hinauf gen Jerusaelm": I. Arioso & Rezitativ. "Sehet, wir gehn hinauf / Komm, schaue doch" (Bass, Alt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86280ed83b02f87ade090c08d874ef0d16437ad0cd9b5c3b727f5db428903a95. 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/CH9211100116 — a six-check JSON result.
Kantate zu Estomihi, BWV 159 "Sehet, wir gehn hinauf gen Jerusaelm": II. Arie & Choral. "Ich folge dir nach / Ich will hier bei dir stehen" (Alt, Sopran)
Soprangruppe des Chors der J.S. Bach-Stiftung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064e0d4a8890070a77a45c4d474d6eb9fcde3a17f6da436ee3d85f96a0b4237d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CH9211100117 — a six-check JSON result.
Kantate zu Estomihi, BWV 159 "Sehet, wir gehn hinauf gen Jerusaelm": III. Rezitativ "Nun will ich mich, mein Jesu" (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae82e4dab2aefec1b5fb450a34978e2f38d005f289cc0c005caa31c766324359. 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/CH9211100118 — a six-check JSON result.
Kantate zu Estomihi, BWV 159 "Sehet, wir gehn hinauf gen Jerusaelm": IV. Arie. "Es ist vollbracht" (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac09839ba8cbc855ba4658530b52186efb9c9d9389f29db08004c1c51058a1. 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/CH9211100119 — a six-check JSON result.
Kantate zu Estomihi, BWV 159 "Sehet, wir gehn hinauf gen Jerusaelm": V. Choral. "Jesu, deine Passion"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7004b09a2930ec72a2c73da2da74058b4bd55a7cfa4e6249a0ea6ee4882cc6. 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/CH9211100120 — a six-check JSON result.
Kantate zum 23. Sonntag nach Trinitatis, BWV 139 "Wohl dem, der sich auf seinen Gott": I. Chor. "Wohl dem, der sich auf seinen Gott"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c1e5f677dba3e0d815e9d215b082045cb84065960e8b1d4a70cd97382a65aa. 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/CH9211100121 — a six-check JSON result.
Praeludium pro Organo pleno in Es, BWV 552, 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c3e8376d91ea212858593c2e06b5aa51bf40b2d6e523f9ce27a2ee4ba70f7b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CH9211700046 — a six-check JSON result.
Kyrie, Gott Vater in Ewigkeit, BWV 371 (Choral)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2735d36631274f8394a96f97b265b09ecfedf3b726256850da9df3355ec500aa. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CH9211700047 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73aeecb7ed349b9a5e6a689973c4197e14f2c606592a883b9a4124d21a0db31. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9211700070 — a six-check JSON result.
Christe, aller Welt Trost, BWV 371 (Choral)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c04f57977b3dbdab5eee664ba81c25710527e88aa3f3703463e6b783693221. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CH9211700049 — a six-check JSON result.
Dies sind die heilgen zehen Gebot, BWV 298 (Choral)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d7e799453e9f2b68a0f4326980d90fbd2e782e721c67b4e2baf5af725324a8. 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/CH9211700055 — a six-check JSON result.
Kantate zum 6. Sonntag nach Trinitatis, BWV 170 "Vergnügte Ruh, beliebte Seelenlust": I. Arie. "Vergnügte Ruh, beliebte Seelenlust" (Altus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb13388eccfbd35bd47adb9d5996c58714ff3d2a13a16a834177e3a8038c0bc. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH9211100251 — a six-check JSON result.
Kantate zum 6. Sonntag nach Trinitatis, BWV 170 "Vergnügte Ruh, beliebte Seelenlust": III. Arie. "Wie jammern mich doch die verkehrten Herzen" (Altus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf65647d07d41ddea0bcb1fe3563392e797147822a79bed3cc06f17816525e4c. 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/CH9211100253 — a six-check JSON result.
Kantate zum 6. Sonntag nach Trinitatis, BWV 170 "Vergnügte Ruh, beliebte Seelenlust": V. Arie. "Mir ekelt mehr zu leben" (Altus mit Orgelsolo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2732dbb9ce0a51b4def43fcf8bfd94f8249b31f62479c2828953c33c810177f1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CH9211100255 — a six-check JSON result.
Kantate zum 6. Sonntag nach Trinitatis, BWV 170 "Vergnügte Ruh, beliebte Seelenlust": VI. Arie. "Mir ekelt mehr zu leben" (Altus mit Flöte) - Bonustrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dcc4953b537fbccf23bb4b456a7b435f1443478b027a86e6e2b7c2b7644c13. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH9211100256 — a six-check JSON result.
Kantate zum 24. Sonntag nach Trinitatis, BWV 26 "Ach wie flüchtig, ach wie nichtig": I. Chor. "Ach wie flüchtig, ach wie nichtig"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb2e5d9355eff9a0b5f4642c0d056e8035432bb1c0d49b54cd09eb9f18d69a5. 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/CH9211100257 — a six-check JSON result.
Kantate zum 24. Sonntag nach Trinitatis, BWV 26 "Ach wie flüchtig, ach wie nichtig": II. Arie. "So schnell ein rauschend Wasser schiesst" (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0290b25e4e16dba17c71721a54924dcc0a4179c9af1ca6e7acb63757efdc6f9a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9211100258 — a six-check JSON result.
Kantate zum 1. Pfingsttag, BWV 172 "Erschallet, ihr Lieder, erklinget, ihr Saiten": I. Chor. "Erschallet, ihr Lieder"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97f94e8e03179d7cc282fd12cfb5f8bc09add2059381837cc0a6378ebacc6fb. 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/CH9211100263 — a six-check JSON result.
Bachkantate, BWV 90 - Es reißet euch ein schrecklich Ende (Live)
Kantate zum 25. Sonntag nach Trinitatis, BWV 90 "Es reißet euch ein schrecklich Ende": I. Arie. "Es reißet euch ein schrecklich Ende" (Tenor) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0457e41d9dc5fd8face2e6af41909ecb976c975b7285e92bca518a0d08cc49b. 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/CH9211700008 — a six-check JSON result.
Kantate zum 25. Sonntag nach Trinitatis, BWV 90 "Es reißet euch ein schrecklich Ende": III. Arie. "So löschet im Eifer der rächende Richter" (Bass) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0940f62dc2b50bcb86a90663509e1107a4016be5a975b9838458f2dde48b9b38. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9211700010 — a six-check JSON result.
Kantate zum 25. Sonntag nach Trinitatis, BWV 90 "Es reißet euch ein schrecklich Ende": V. Choral. "Leit uns mit deiner rechten Hand" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01b1e24daefa79fd0777461ba45f017e6aeeb8b755de4d10fa29ca84a679cd6. 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/CH9211700012 — a six-check JSON result.
Bachkantate, BWV 168 - Tue Rechnung! Donnerwort (Live)
Kantate zum 9. Sonntag nach Trinitatis, BWV 168 "Tue Rechnung! Donnerwort": I. Arie. Tue Rechnung! Donnerwort - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bfce1c80febc5cf79b1b15e275db108952aa4ca884b15b05bb36c1689cd1e6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9211100347 — a six-check JSON result.