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 0x3de59c751cbe46f1a11b605129fa197366b117f00049b02f60865f62a2da69ae. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34575f6b-114c-4f16-9dae-6c385ab0cb08.json and https://artists.proofprofile.net/proofs/artist/34575f6b-114c-4f16-9dae-6c385ab0cb08.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Matthäus-Passion, BWV 244, Erster Teil: 2. Evangelista, Jesus "Da Jesus diese Rede vollendet hatte"
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 0x721b94b22a53b321376b33230e23c40314b50814eb5acef6a7e4532a2379dfa9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ149809020.
Matthäus-Passion, BWV 244, Erster Teil: 4. (Evangelist und Chorus) "Da versammleten sich die Hohenpriester", usw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66910e2bdec5bab1fee92a517fc1758977784abc703b63b2340b1d35989d278d. 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/FRZ149809040.
Matthäus-Passion, BWV 244, Erster Teil: 7. Evangelista, Judas "Da ging hin der Zwölfen einer"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e86fa73b52505292ef8911fdb811008744bb74ac77401668838ba2c86bba3d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRZ149809070.
Matthäus-Passion, BWV 244, Erster Teil: 9. (Evangelist und Chorus) "Aber am ersten Tag der süßen Brot"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af8596198a95198d0f03a1be4833a90b7afe737e15562c8a8df96b1b61620af. 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/FRZ149809090.
Matthäus-Passion, BWV 244, Erster Teil: 11. Evangelista, Jesus, Judas "Er antwortete und sprach"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc631fefc0296cd569123a9c9f816ecbf33c347f29fd15c1e8e50a4af57d0aa17. Chain 2 (Bitcoin): anchored in block 956995 (2026-07-07T04:27:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ149809110.
Matthäus-Passion, BWV 244, Erster Teil: 14. Evangelista, Jesus "Und da sie den Lobgesang gesprochen hatten"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199f2c1fc064f30011fb281ffd253fd78ec3bbcbd85c2b8ce5ca24b3ccb8427a. 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/FRZ149809140.
Matthäus-Passion, BWV 244, Erster Teil: 16. Evangelista, Petrus, Jesus "Petrus aber antwortete"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce861300c879919fdef718e213e88b25f1fd8bfb1a415b3f4559b1d6fd79c3b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRZ149809160.
Matthäus-Passion, BWV 244, Erster Teil: 18. Evangelista, Jesus "Da kam Jesus mit ihnen zu einem Hofe"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11c61bae5e7c47c30f3bd1178ccbe3ba223f8db4dea3b5a6ec1342329e6b066. 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/FRZ149809180.
Matthäus-Passion, BWV 244, Erster Teil: 21. Evangelista, Jesus "Und ging hin ein wenig"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ed21bacc2cc9dbcccd8cacad0ce974d45ba2affb60a35915ed2b023c85e12a. 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/FRZ149809210.
Matthäus-Passion, BWV 244, Erster Teil: 24. Evangelista, Jesus "Und er kam zu seinen Jüngern"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19b081ea135cb8a3861bfcdbc0d72056396485a9fad5c7aeea5e64739f341af. 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/FRZ149809240.
Matthäus-Passion, BWV 244, Erster Teil: 26. Evangelista, Jesus, Judas "Und er kam und fand sie aber schlafend"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a374b3784c9cf9644d6eaefc7a55c34995ccd11fa42c6323ce03f58473e4a6. 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/FRZ149809260.
Matthäus-Passion, BWV 244, Erster Teil: 28. Evangelista, Jesus "Und siehe, einer aus denen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cad334b046c1043566d558b0f27a4630520d631782bd5c3a8ba9b6bd35144e. 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/FRZ149809280.
Matthäus-Passion, BWV 244, Zweiter Teil: 43. Evangelista, Pilatus, Jesus "Sie hielten aber einen Rat"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a5ba59e7699ce6560fc09309773ad1ce5dc0077e4ed141639e067fbaff4bf2. 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/FRZ149810140.
Matthäus-Passion, BWV 244, Zweiter Teil: 36a. Evangelista, Pontifex, Jesus "Und der Hohepriester antwortete" - 36b. Chorus I & II "Er ist des Todes schuldig" - 36c. Evangelista "Da speieten s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af51f89e4da4493604322f1f1618c4f40d3ac238205dde31e3f6187b6846049. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ149810070.
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