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 0xe7581df25e226c2f115b21bc6c537666dac0bc8071ae3adbdde1ec656e0a8d89. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d669b7bb-cd1d-45be-a3c6-7061eeac0502.json and https://artists.proofprofile.net/proofs/artist/d669b7bb-cd1d-45be-a3c6-7061eeac0502.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Matthäus Passion, BWV 244: Evangelist: Da Jesus diese Rede vollendet hatte
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4fd5f14d22676bf1809b1f0a3e1ea4d4f758208eaec6ad3660707c21f3571b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681303276.
Matthäus Passion, BWV 244: Evangelist: Aber am ersten Tage der süßen Brot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76c63a933a60803ca412218546dc9df83362ee77a02a1c47d99546b0ee53cb2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLD681303283.
Matthäus Passion, BWV 244: Evangelist, Jezus, Judas: Er antwortete und sprach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1a1bcd3777c4e1ee4ce7145d3d66153777d3bc7682f7f2f5b105a588fc3ba2. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLD681303285.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681303290.
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 956312 (2026-07-02T05:09:12Z), 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/NLD681303292.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681303302.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681303310.
Matthäus Passion, BWV 244: Evangelist, Ancilla I/II, Petrus: Petrus aber saß draußen im Palast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d14e41ecbeb06842dc9832b67fbcb4ee3ac1b43d4c285a6b798381ebe5e982. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:35:33Z), 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/NLD681303312.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681303317.
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
Matthäus Passion, BWV 244: Evangelist, Pilatus, Uxor Pilati, Choral: Auf das Fest aber
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2d1ce2bef80154a1995ab874324a5f6320c6a325049bdab18e7f6e26c3148b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681303319.
Matthäus Passion, BWV 244: Evangelist: Da versammleten sich die Hohenpriester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451dd8d0f42d846b50e032082a7e41a9220d3087aa5b2070359f93f865e446d7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLD681303278.
Matthäus Passion, BWV 244: Evangelist, Judas: Da ging hin der Zwölfen einer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fdc71238a389ac7f3d41d5076e095ec38f65817d2fcacd30310b90ca4de9d9. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/NLD681303281.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681303288.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681303295.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681303298.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681303300.
Matthäus Passion, BWV 244: Evangelist: Die aber Jesum gegriffen hatten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811e07c96be25cb4dfe24ee1f7389acef77972bfcbb5c27df344289e2baa4e88. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLD681303305.
Matthäus Passion, BWV 244: Evangelist: Und wiewohl viel falsche Zeugen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5affea718f5fc50e0df44d6e3069bcedf1f89eda6d5fdee64bbb2142a710f033. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NLD681303307.
Matthäus Passion, BWV 244: Evangelist, Judas: Des Morgens aber hielten alle Hohepriester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5806fd4ff1b951ca43bcb6f44becc6ff34061329e7d3c7072599ce2090345c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLD681303315.
Matthäus Passion, BWV 244: Evangelist: Sie schrieen aber noch mehr
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e5d1b91256aaee4b03c746127255ab4d5c77c18aac2eca49fc53b1d80d2b06. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLD681303324.