Nico van der Meel is a Dutch tenor, born in 1956 in The Hague. He made his debut with the Concertgebouw Orchestra during the 1987/1988 season and made a recording of Bach's St John Passion, conducted
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 0xf4561a28e8c91c6d015a4ff69b95392b187a28f452ee64d663ac6ac6639cfb4b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19c3f88a-d988-4fe7-9c9b-3f35a00698a5.json and https://artists.proofprofile.net/proofs/artist/19c3f88a-d988-4fe7-9c9b-3f35a00698a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
J.S. Bach: Complete Sacred Cantatas Vol. 10, BWV 181-200
Himmelskönig, sei willkommen, BWV 182: II. Coro. Himmelskönig, sei willkommen
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 0x14f9f7abd5319022b502fff8a53a7c2aae492d2e9e6d76b319176000f206dfb1. 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/NLY331307674.
J.S. Bach: Complete Sacred Cantatas Vol. 09, BWV 161-180
J.S. Bach: Complete Sacred Cantatas Vol. 08, BWV 141-160
Herz und Mund und Tat und Leben, BWV 147, Prima Parte: I. Coro. Herz und Mund und Tat und Leben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2441cd22a234d0da0441aacd2fdc21f95cb4551dc748a8e66c2223a49c4b2ef1. 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/NLY331307465.
Herz und Mund und Tat und Leben, BWV 147, Seconda Parte: X. Choral. Jesu bleibet meine Freude (Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f33d3d8403aaa4a105e96480e74fa73faf08613faf0a38bf88dfc97a49cbf2. 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/NLY331307474.
J.S. Bach: Complete Sacred Cantatas Vol. 07, BWV 121-140
J.S. Bach: Complete Sacred Cantatas Vol. 06, BWV 101-120
J.S. Bach: Complete Sacred Cantatas Vol. 05, BWV 81-100
J.S. Bach: Complete Sacred Cantatas Vol. 04, BWV 61-80
J.S. Bach: Complete Sacred Cantatas Vol. 03, BWV 41-60
Jesu, nun sei gepreiset, BWV 41: I. Coro. Jesu, nun sei gepreiset
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8dc91be29582c3f626168bdfa334c2f9294cfbe2070f4c093ae2459b538a75. 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/NLY331306813.
J.S. Bach: Complete Sacred Cantatas Vol. 02, BWV 21-40
J.S. Bach: Complete Sacred Cantatas Vol. 01, BWV 1-20
Wie schön leuchtet der Morgenstern, BWV 1: I. Coro. Wie schön leuchtet der Morgenstern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cba69397a5d0146e558dfc354b9adf1c024dba8d07d2024cd4b102d920a1b9. 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/NLY331306556.
Christ lag in Todesbanden, BWV 4: II. Coro Versus I. Christ lag in Todesbanden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e7767f580e43f6e907ae803cce69cb95f7ed11c9b4b968fe1c4ef441bd0fb3. 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/NLY331306575.
Wo soll ich fliehen hin, BWV 5: I. Coro. Wo soll ich fliehen hin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984eaaa7b19b65b55ba60b9b8b7f18c4630a783353e4eb81707b3a8eff93aaab. 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/NLY331306582.
Christ lag in Todesbanden, BWV 4: IV. Aria Versus III. Jesus Christus, Gottes Sohn (Tenore)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ba04523910fced02b6295495ddd61a6a991ddb0009e8a526878c379174b2ec. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLY331306577.
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
Christ lag in Todesbanden, BWV 4: VII. Duetto, Versus VI. So feiern wir das hohe Fest (Soprano, Tenore)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e355f97f99b79d2c54746f67822583fdcbbaf9a0532364363dcd5b1ba8bcb8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLY331306580.
Wachet auf, ruft uns die Stimme, BWV 140: II. Recitativo. Er kommt, der Bräutgam kommt (Tenore)
J.S. Bach: Wachet auf, ruft uns die Stimme, BWV 140
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108f7ad725b7ce8ba2ec6bef291414774dcd59a18b78e61a58a216360ab67e87. 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/NLY331408523.
Wachet auf, ruft uns die Stimme, BWV 140: IV. Choral. Zion hört die Wächter singen (Tenore)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e92655e87e36018bfbbb7ffbac08851db60a1faecba61d5afc9859cae1d73c. 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/NLY331408525.
II. Ich Liebe Den Höchsten Von Ganzem Gemüte Bwv 174, At The 2nd Day Of Whit Sun,am 2. Pfingsttag: Sinfonia (Concerto)
Holland Boys Choir, Netherlands Bach Collegium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1a74e70a33932bee4ac7df444ccd7667cab82430378597fec72774ac93007a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580505227.