The Rheinische Kantorei is a German vocal ensemble of baroque music accompanied by an instrumental ensemble called Das Kleine Konzert. History The Rheinische Kantorei and Das Kleine Konzert were fo
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 0x9b12ccc3a30dcb02d1ed089f30513f6754134a789e80aa9ce187736c78d44d12. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14ffc4da-52f9-47e5-8c76-f15bb4c8d05b.json and https://artists.proofprofile.net/proofs/artist/14ffc4da-52f9-47e5-8c76-f15bb4c8d05b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kuhnau: Magnificat in C Major: I. Chorus. "Magnificat"
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 0x904a6c653403dc7b469b2a19fe28d22a334f251359d476284472983309912c9a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEA621701234.
Schelle: Magnificat in C Major: III. Christmas Verse. "Vom Himmel hoch"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5182d8e1e8a471a714bde624fb9b666ff64a2814635de2798421d5ddb90143c3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA621701236.
Kuhnau: Magnificat in C Major: V. Chorus. "Quia fecit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e93b5d7fdc3a66d6405825e3a67f62804a4caa54cd76ea63e94868b44fe7c1. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEA621701238.
Schelle: Magnificat in C Major: VI. Christmas Verse. "Freut euch"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ace528f60d87fb6ee23fff1d6ecbcb87463175e2adfc69a5fddb5cbecf0fff5. 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/DEA621701239.
Kuhnau: Magnificat in C Major: VIII. Chorus. "Fecit potentiam"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2c2430580356fd23ba4f0dbd9a3aa38908531a8e321228e780b5d94bb9a3ab. 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/DEA621701241.
Schelle: Magnificat in C Major: IX. Christmas Verse. "Gloria in excelsis Deo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09fb1c824644586867846340250e6b581c84d1713937539c4bef3415910d4f8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA621701242.
Schelle: Magnificat in C Major: XI. Christmas Verse. "Virga Jesse floruit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ec3a227057236a7d17c6750d611ea5cb7d4e968955da28ecc17b29c20d30d7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEA621701244.
Kuhnau: Magnificat in C Major: XIII. Chorus. "Sicut locutus est"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744f280bd768dacd08736f4ab23c8879bfd6ee86349631f351357238e769eccd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA621701246.
Kuhnau: Magnificat in C Major: XV. "Sicut erat"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff070e9c820a580c314793b1bca5b278051c7d9c62551dcc742148c59c333f5f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEA621701248.
Caldara: Magnificat in C Major: I. Chorus. "Magnificat anima mea"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec8f86dbfe82f50126191df561feb70a841bdf46d7da0c5542e6ed2f61e2f14. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA621701229.