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 0x11eaeee3997413f9e8861768bf70f07325840b962f8ef763838e6daf3808da99. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec72a0b9-5d3c-4ee9-8682-fd5f70c3a6cf.json and https://artists.proofprofile.net/proofs/artist/ec72a0b9-5d3c-4ee9-8682-fd5f70c3a6cf.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Matthäus Passion, BWV 244: Evangelist, Jezus, Judas: Er antwortete und sprach
J.S. Bach: Matthäus Passion (Deluxe Edition)
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 0x5d1a1bcd3777c4e1ee4ce7145d3d66153777d3bc7682f7f2f5b105a588fc3ba2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLD681303285 — a six-check JSON result.
Matthäus Passion, BWV 244: Evangelist, Jezus: Und da Sie den Lobgesang gesprochen hatten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe2d197d32dc646cb5561949c402eed762cf3d6c7dca9ed28c576c4b6102627. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681303288 — a six-check JSON result.
Matthäus Passion, BWV 244: Evangelist, Petrus, Jezus: Petrus aber antwortete und sprach zu ihm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd855aa2850e080462e575a7a08d3c355826c43b62bb5fb48bd573eb2f05b2972. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLD681303290 — a six-check JSON result.
Matthäus Passion, BWV 244: Evangelist, Jezus: Da kam Jesus mit ihnen zu einem Hofe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4d5d0c0bcd3ec5e113b685acdaddd7eb8e7c2bbf7b8f1dd88eda76d53159ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLD681303292 — a six-check JSON result.
Matthäus Passion, BWV 244: Evangelist, Jezus: und ging hin ein wenig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9760981fd8c9b20debe6093daffbc41792823181e77392579d01eaa8421324. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/NLD681303295 — a six-check JSON result.
Matthäus Passion, BWV 244: Evangelist, Jezus: Und er kam zu seinen Jüngern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5770d366785faa881107a66308e5dd10c130bcf9b0ffb116ec701d903cf3dfcf. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/NLD681303298 — a six-check JSON result.
Matthäus Passion, BWV 244: Evangelist, Jezus, Judas: Und er kam und fand Sie aber schlafend
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500685a03ca5dc72d7a65d5c663472eb17102bf3083f3a100154e8ee6951feac. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLD681303300 — a six-check JSON result.
Matthäus Passion, BWV 244: Evangelist, Jezus: Und siehe, einer aus denen, die mit Jesu waren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7575a0b10030e913eb7516201b9a660b5cb3b02bf00fbe37bf918481d9660349. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLD681303302 — a six-check JSON result.
Matthäus Passion, BWV 244: Evangelist, Pontifex, Jezus: Und der Hohepriester antwortete
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cc7482c15cc4703ed4801d04a2a69b264bcc0100ba5315b77b34cf0e59b316. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLD681303310 — a six-check JSON result.
Matthäus Passion, BWV 244: Evangelist, Pilatus, Jezus: Sie hielten aber einen Rat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca97edfcc351b19abd0a087a86f1185824dc9a6c9b5973d646eee10a360ea964. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLD681303317 — a six-check JSON result.
Matthäus Passion - BWV 244: Evangelist, Jezus, Judas: Er antwortete und sprach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c5bc24592e035b9e955d063484a5e38a3d10c4b6d795bb2a0e34bce104b176. 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/NLD681300786 — a six-check JSON result.
Matthäus Passion - BWV 244: Evangelist, Jezus: Und da Sie den Lobgesang gesprochen hatten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7be1e77d6263bbbb6be3d81d7a92a1acc59370494c194be869c19b341810ee6. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NLD681300789 — a six-check JSON result.
Matthäus Passion - BWV 244: Evangelist, Petrus, Jezus: Petrus aber antwortete und sprach zu ihm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1d87178ca7bd55030f594d97b99d7b0bf36340dd5a4b364b204a67faceffb5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLD681300791 — a six-check JSON result.
Matthäus Passion - BWV 244: Evangelist, Jezus: Da kam Jesus mit ihnen zu einem Hofe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8387d79dddca04d3be1839714d94899f358b6a7a668bb412c3124fde6ac106fc. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/NLD681300793 — a six-check JSON result.
Matthäus Passion - BWV 244: Evangelist, Jezus: und ging hin ein wenig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfd9b3b9cb6a710be7f24a83c6275d3f25dee446e920074fe00aa81801f8481. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLD681300796 — a six-check JSON result.
Matthäus Passion - BWV 244: Evangelist, Jezus: Und er kam zu seinen Jüngern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258d5299945269c7a40a415eb0719363dc56732df2b86f43bef9e8cb6e0a9423. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLD681300799 — a six-check JSON result.