Jan Kleinbussink (born 1946) is a Dutch classical musician who specializes in the performance of old music.http://www.brabantsdagblad.nl/algemeen/kunst//article2142818.ece Brabants Dagblad He is the
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 0x45f52c793ea29bb2256aeaa1554980682bed195f01aeb4a0667e35b49d905ace. 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/6b3579a4-be93-4d1d-bd18-b62da228912c.json and https://artists.proofprofile.net/proofs/artist/6b3579a4-be93-4d1d-bd18-b62da228912c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
J.S. Bach: Orgel- und Cembalowerke, Kammermusik, Motetten
Toccata And Fugue In D Minor, BWV 565: (Toccata) Adagio
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 0x6dba68dcf52187658424705b746f16fe1476297f3d59586a65e4fa102720b30f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEF058300331 — a six-check JSON result.
Toccata And Fugue In D Minor, BWV 565: Fuga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590ecbce6e90d27fec8278e18b9f5f4be36fcb4acaa15cc5a4be5f062bc5e65d. 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/DEF058300332 — a six-check JSON result.
Toccata, Adagio And Fugue In C, BWV 564: 1. (Toccata)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45bcd44226019fd53d4d9cb01a9a37ea085b0cb9279bb8d2163e88a05bd35de. 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/DEF058300341 — a six-check JSON result.
Toccata, Adagio And Fugue In C, BWV 564: 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3013050f963f496a5264197ed665b7e19c9b96b582b5c01c8b9a9932d54c88a9. 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/DEF058300342 — a six-check JSON result.
Toccata, Adagio And Fugue In C, BWV 564: 3. Fuga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd0a203d8a62c8d096a15970fd9aa390317828023c03fc7e7b3b3bcfe2234c2. 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/DEF058300343 — a six-check JSON result.
Toccata (Prelude) And Fugue In F, BWV 540: 1. (Toccata)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd606623ea47f94c6d1d55ec7d21fbafea6b7d99c3b519843b7592ba7ca5442b7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEF058300351 — a six-check JSON result.
Toccata And Fugue In D Minor, BWV 538 "Dorian": 1. (Toccata)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd209c007dfa153bd7d5b52fd0a3e626ab4f81cc0c1c1935223015519c4f0a066. 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/DEF058300361 — a six-check JSON result.
Passacaglia In C Minor, BWV 582: Passacaglia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf7e71b269e9c40f4d8dbea66931c655538880874fb574a7c5c108b2b5f509e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEF058300681 — a six-check JSON result.
Passacaglia In C Minor, BWV 582: Thema fugatum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e82a68a8e44f82f58fc0c09b598c6e4584a11e88bedb6055e76a1998d71c3f. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEF058300682 — a six-check JSON result.
Wachet auf, ruft uns die Stimme, BWV 645 ('Sleepers, Awake')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88c1b22d599e57cda63be0a686774d1a4521195f70be783df4366cc984e5257. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DEF058204290 — a six-check JSON result.
Wer nur den lieben Gott läßt walten, BWV 647
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4f22ab645a0b487e62598c39968f96b3592bd7fc165d23d67ed2e2355ba0cb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058204310 — a six-check JSON result.
Concerto for 3 Harpsichords, Strings, and Continuo No. 1 in D minor, BWV 1063: 1. (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cb61b33fdd8d9ae4adb40f063620c1bd8f2ee6dbe823d3ce435b8fb07dc06c. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508108804 — a six-check JSON result.
Singet dem Herrn ein neues Lied, BWV 225
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53676f497c249bbd9eea4ee4be2d296aeb738e6b68a61cfbdf07ce59c55255da. 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/NLA509119901 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcee18a7db1580e36b0bf1c5ae997dd579deb69593eba50eaee2f00ae55e2e38. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLA509119903 — a six-check JSON result.