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 0x0ec2bb8cd84092e6eaf8fc66a37a6fe89a7ce8b31160ebb2cbf4c58ee162ea6d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/676542dd-6cfd-4f55-bc14-8ce6536b83b6.json and https://artists.proofprofile.net/proofs/artist/676542dd-6cfd-4f55-bc14-8ce6536b83b6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Bach J.S.: La Passion selon Saint-Matthieu, BWV 244
La Passion selon Saint-Matthieu, BWV 244: Choeur I. "Kommt, ihr Töchter, helft mir klagen" - Choeur II. "O lamm Gottes"
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 0x217fabf6563634bb31fb9c6609023a4ade4597a614e548ac562c1f6534b40f9c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ178104620 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Récit. "Da Jesus diese Rede vollendet hatte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb417bce486837c0b5035d0c4a195a0d9f76e64fce5a6d0cbe811a187fbd65ace. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ178104630 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Choral. "Herzliebster Jesu, was hast du verbrochen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da8a8c71be0e0ec53c357b9127dbcc9498b98e5936991506842167d7b827e8a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ178104640 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Récit. "Da nun Jesus war zu Bethanien"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d0eb5566eaf3a61105db2d5a4299414f1770e989408c156a19ba37e8f58e84. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ178104670 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Récit. "Da das Jesus merkete"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940205b8738d8ae76f8c640bacf3e8671ce7172c28e12b77a830e04d188fb189. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ178104690 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Récit. "Du lieber Heiland du"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaee6aecb23fa272209622b84b0400150693355a0f398373d9b2f3bb76a82e77. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRZ178104700 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Air. "Buss und Reu"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cc62121ee647a6a1cfd6e739440f0c4019491dfa95f899f2e372a91b306eaf. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ178104710 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Récit. "Da ging hin der Zwölfen einer"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b3fa7022a133f7f774e9825ac1c64550127ad06826e4514c3b546c9506a3d6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ178104720 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Air. "Blute nur, du liebes Herz"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7a05267184a059c7db51c09b69583facc74c893b18e2a87e59b1605282d638. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ178104730 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Air. "Erbarme dich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8109391076ae5621a92dd369653dbb45b596f736901c7e5eae7dc279be5186c4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ178105080 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Récit. "Er sprach, gehet hin in die Stadt"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972007f838e06a4a40361b95aa95bd33e7546bad9e55be503cac60fd008fded9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ178104760 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Choral. "Ich bin's, ich sollte büßen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f38b37bdd3eafb012a460d3e594f3f38c99dc8968a83c39a09a5a77b913800. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZ178104770 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Récit. "Er antwortete und sprach"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e6f69a176b96d65b28a678452c0d2af43bacc8416ddec47da29d8169e3a788. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZ178104780 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Récit. "Wiewohl mein Herz in Tränen schwimmt"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f230a998baa3da4c638d1b36165ff9cd953e5c9a8efdc6931c9cbfa405f871. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FRZ178104790 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Récit. "Petrus aber antwortete"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810461a7f0b83b4bc45776b61b4db80d3d853fc11b5f36adbf0bb393f3e0d0d3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ178104830 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Choral. "Ich will hier bei dir stehen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb695405aeecdccdcb590226abb9819c39faa1fc2450fccce08e3e63483e3f4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ178104840 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Récit. "Da kam Jesus mit ihnen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2026b6398bd9ce917dbf10d212e0d5e885e31dc462b264ca73d3016f744cee8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ178104850 — a six-check JSON result.
La Passion selon Saint-Matthieu, BWV 244: Récit avec Choeur. "Ich will bei meinem Jesu wachen" - "So schlafen unsre Sünden ein"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20daca06ca5d943db95e2d96c89ae6aac23fe48a095886eb8371c61b8a83573d. 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/FRZ178104870 — a six-check JSON result.