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 0x5151abefd8032eacdff16f2edecba74840472df658a729b77ecba98fb5da1748. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae4cc800-06de-4105-929a-52d2991b687f.json and https://artists.proofprofile.net/proofs/artist/ae4cc800-06de-4105-929a-52d2991b687f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Matthäus Passion - BWV 244: Chorus: Kommt, Ihr Töchter, helft mir klagen / Choral: 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bc156b7237ae7f96cf932cff29d0e62816d9f9490bb8a1e7b34813919187c2. 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/NLD681300776.
Matthäus Passion - BWV 244: Choral: Herzliebster Jesu, was hast du verbrochen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d529092fdbdf02a00d31d15f8f47cbe21fa2740b3e6c3f239230711c3a1dd1. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681300778.
Matthäus Passion - BWV 244: Recitative (Alto): Du lieber Heiland du
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e82112574bc5638022ba3ef7c263860c27eab732ca905ca7fc991341c6599e. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:43:33Z), 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/NLD681300780.
Matthäus Passion - BWV 244: Evangelist, Judas: Da ging hin der Zwölfen einer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a761f54730dad0f83f699d642a50c9fe44bc9d3ee738ed750710f61d59baad2. 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/NLD681300782.
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 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/NLD681300786.
Matthäus Passion - BWV 244: Choral: Erkenne mich, mein Hüter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8304d702ff24440ea17768960d81023b9c579051142a0dbeb725e988ed74ce48. 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/NLD681300790.
Matthäus Passion - BWV 244: Recitative (Tenor): O Schmerz! / Choral: Was ist die Ursach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cce06d1ddfd40a644c16df05d813473248dec4b23c9b93085967fa904451cf6. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:30:29Z), 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/NLD681300794.
Matthäus Passion - BWV 244: Aria (Tenor): Ich will bei meinem Jesu / Choral: So schlafen unsre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f1b43522996374f48754cc6d35a7a917108c7746fa73f829e87964bd669dbd. 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/NLD681300795.
Matthäus Passion - BWV 244: Evangelist: Da Jesus diese Rede vollendet hatte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24cdad3c86302beb6da0c11c566f66b7386f50722b72bd9af2a1d7bb341ba17. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NLD681300777.
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: Da versammleten sich die Hohenpriester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929d2c4cb4907b4157238c75e88c7b7cffc7884e4dc2ce34da31aad3ff083432. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681300779.
Matthäus Passion - BWV 244: Aria (Alto): Buß und Reu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f27786247a0743241a3aa376bb0f2a769edebd5fe6716dbba1fc93dc750bd08. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLD681300781.
Matthäus Passion - BWV 244: Aria (Soprano): Blute nur, du liebes Herz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06e52366aa225e197eb1b04a788e637234d847245158493cc4e79e758e8624d. 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/NLD681300783.
Matthäus Passion - BWV 244: Evangelist: Aber am ersten Tage der süßen Brot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808253ad92641a1937b5a2e058662743417b3deab88c9fa6b98f726c1b267ad7. 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/NLD681300784.
Matthäus Passion - BWV 244: Choral: Ich bin's, ich sollte Büßen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bf3e8e0828992021cfba186206adb989a6993099174c531b802518cd9ccef8. 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/NLD681300785.
Matthäus Passion - BWV 244: Recitative (Soprano): Wiewohl mein Herz in Tränen schwimmt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d24eec8d53b91ff620db758aafca09b263d7091444cfb37c4e13d428aca433. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/NLD681300787.
Matthäus Passion - BWV 244: Aria (Soprano): Ich will dir mein Herz schenken
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60b8fbf438602d1b3565e93680c8659d3dcf457657984bb0e929aa62a8441de. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/NLD681300788.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681300789.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681300791.
Matthäus Passion - BWV 244: Choral: Ich will hier bei dir stehen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec33e92084bf2902b063e90f1c77e5e006a6da9426e45c2c22e5a097319e683. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681300792.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLD681300793.