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 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, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9211100110.
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 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/CH9211100116.
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 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/CH9211100119.
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 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/CH9211100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73aeecb7ed349b9a5e6a689973c4197e14f2c606592a883b9a4124d21a0db31. 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/CH9211700070.
Dies sind die heilgen zehen Gebot, BWV 298 (Choral)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d7e799453e9f2b68a0f4326980d90fbd2e782e721c67b4e2baf5af725324a8. 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/CH9211700055.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9211700047.
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
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9211700049.
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 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/CH9211100253.
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 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/CH9211100257.
Bachkantate, BWV 90 - Es reißet euch ein schrecklich Ende (Live)
Bachkantate, BWV 168 - Tue Rechnung! Donnerwort (Live)