Jack (Willem) de Nijs, artist name Jack Jersey (18 July 1941 – 26 May 1997), was a Dutch singer, composer, arranger, lyricist and record producer of light music (popular music) who worked for national
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 0xa51addbf2318e11d2c7603e3492480ef89492731471ad6d3ea54b44e18aaf53c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f8ff7d7-4db9-4fee-9287-f95fa821be9b.json and https://artists.proofprofile.net/proofs/artist/1f8ff7d7-4db9-4fee-9287-f95fa821be9b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
In The Still Of The Night (Expanded 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 0xb03abbe115d1cd54a411898ec105b6df92470e64e68187ec4a03f5ecd0c65c12. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:21:34Z), 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/NLA271200448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa618a9852f913897b3a641a59d4df41718d70c494ce618942340486a048f89aa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLA271200445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40597c4af04932b9c6370b96131cc8e244a703cd27ec3385dc70cdfb1487a03f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLUM72300762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a707cbbfae81590b867edc53603f67be5f16fba45a8d1d8a2186ac4afc3263. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLUM72300781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92a94fc64e167530a86d8590c900fbbe4fb9a7eafc220d28ce6d3fa11418fc5. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/NLUM72300439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e1df8da9ed238a490d61f624c970225047407a1d0bea77d031d319ecb0007f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLUM72300442.
Forever (Remastered 2023 / Expanded Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356642ad3a7b3ec510eeb2d0cc82bf9fb6f637858a9bd35b2f63288606b5238e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:44:38Z), 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/NLUM72300791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa704de510b71e3b0d3ee3b977c91ffbf45d5edc3efb1d387fb50c760252b7479. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLUM72300792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b0066e3422b3c604af666fcb97439ce6207fa30493f0556d89b7082261474e. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/NLUM72300799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd869eaabd2afface0d5dabd41210153aaecdb3a6885c263eeb968e1a2740bfd7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:37Z), 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/NLA270510698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375a8914c35ae23fddea4e51d178af2aebea79604fe1177f69f957a581ef66ce. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NLA270510701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3356c3de918b3d481e58f3f477828031250bfb060c09f00e8c0666c6e3fbef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLA270510702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caf7adac5ccfa551c86ed2f97d7d87e778035238998d1cb7252f90f73f960f2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLA270510703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8789bdcceeea76fd5b8943cbb36b40384201d28259d7422c164c66cafd64d1a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/NLUM72300823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f234a58da6b0d44cd16479c246fd77f0d5766463de768c896acdfa2b47d4b9e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLE320800554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1233636ce9dcb84daa063ebf8d0900235c1f2be0881c0e1ca05e4989ea95447e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NLA270601093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d8cf65b0f14e5ea8be323735131def4169abad3755ac26d9533372dfb4298b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NLH660400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d2c6d29af244b4195e2fc01591f3bb904dc1f120d80436224acea6c8d91c0e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:29:45Z), 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/NLH660400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60c7ff9d978211c3700e767cc092074f1d35b9761c14b06a95d2d1f4bac4f8a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLH660400032.