Stuk or STUK may refer to: Radiation and Nuclear Safety Authority, the Finnish nuclear regulatory agency StuK, abbreviation of , a German designation for artillery guns "Stuk", a 2008 song by 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 0x8c584194b9022d07ac72df488e0762325c1607bdfdce8de3a611899ba57018c1. 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/92af5650-9d22-4e40-8724-5e56c787f5fe.json and https://artists.proofprofile.net/proofs/artist/92af5650-9d22-4e40-8724-5e56c787f5fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x661e5372554f50f1b9a72cf18461b25118bc175ca7d2f6a17f1860622238ff48. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLMN21700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5c2c19d812ac12b2926808aa90b19e08c6398b60e70a554b86fa6b2990167f. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/NLMN21700028.
Als Je Niet Kan Zuipen (feat. Kraantje Pappie & Roberto Tan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155c78b34131d03c905b7de9f1f570609b2e93017113709f80e8bf7b0bbf31f9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLMN21700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa5e6af8181730dd637f666bae9963a8f064b11ec59de64c0945b7225689e01. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLMN21700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e80215c9093ac768a4577ad339b60aaf534102b46c0ddf7eafb4d9f8a7ddbef. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NLZ541701031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba16a9522c9e2619dbacf0dafdedd98b982d06300d35fe8087b1bff630c3173c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NLZ541701032.
Marguareth (feat. Jebroer, Mafe, Cartiez, Def Major & DOA 7)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa8d22592cc8e067141412c4501d9a5babee1b586fb0f19744163ac8de9ac35. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLMN21800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be52be554e2a25defd6aa5fa31431b665267fc75fdc6890b2e156aa32c31d73. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLMN21800007.
Marguareth (feat. Jebroer, Mafe, Cartiez, Def Major & DOA 7) [Remixes]
Marguareth (feat. Jebroer, Mafe, Cartiez, Def Major & DOA 7) - Capital Candy Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d01a357c22d95fdac6b48061fdc73dbaf6ce4a99a6b48f94eb0275492b3ce3f. 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/NLMN21800008.
Marguareth (feat. Jebroer, Mafe, Cartiez, Def Major & DOA 7) - STUK Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222726a66b524158c6d727219ee365a595495a7c87f8959fd9e8f2aa3ab2221d. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NLMN21800009.
Marguareth (feat. Jebroer, Mafe, Cartiez, Def Major & DOA 7) - Crooxs Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d116d779ee4ff82989a47af3065c066443d0fe0fb4b607164fdc79b9b3822d5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLMN21800010.
Flessie Water (feat. Donnie & Mr. Polska)
Hoppakee (feat. Gladde Ger & Billy Dans)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52af25211eefe6f3b6bfe191f7c571db3cedaefba552a2e2ed76544ec8bee96. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL2GD1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaa2e1e5dc7fe9ed0b95cbec15bffd36d3d10333fec9452ab5b3f2d7e057e39. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL2GD2000003.
Dom Doen (feat. Danny de Munk & Billy Dans)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e64b79efdf2741e7012715597cfa1dc6f96bc1d0f4ebf6f8e32a56585ec81b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL2GD2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaa2e1e5dc7fe9ed0b95cbec15bffd36d3d10333fec9452ab5b3f2d7e057e39. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/NL2GD2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998a0a49737c0cd8e89d31b3a32b8f8d6435cc1e11d0f77ca0d5c0be7552e194. 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/NL2GD2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba498bd0af2156d2e178e949b2c784974a5a2bfea5dce10955d9e6d2561fe9a. 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/NL2GD2000006.
Levende Legendes (feat. LNY TNZ & Stepherd)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa643c6ae46f16a15ee03a27b5c98d156e5b7eb6fdab37ef2143bf335ab048975. 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/NL2GD2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86537d11e3c9116c3171ba66454a5388d5edf49ed72cb7561d9812fa64d2f8d5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NL2GD2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dba7d724b618d852d16bb196123ca27d8b1ea6e794d7d5e620ac655b64d527e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NL2GD2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74488b57a1e2210ce6bde4d02f21ae87941d3c1467e560e6cbb6ab31b3dc8ea. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLV6L2000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8077927dcb6cda8b85847c6ada13d9a91670cc487025c8bdaf06a85a591b4c59. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS242100191.
Shots, Sambuca, Confetti, Bazooka (Darkraver Extended Remix)
Shots, Sambuca, Confetti, Bazooka - Darkraver Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c013349c784ed5531769731751d8d9c557447687ca664f767c6d3ae2fa8bb12. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL7HA2200002.
Shots, Sambuca, Confetti, Bazooka (Darkraver remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739327d2e916136dbf0d93eb68597da3fe1086d0ffc04c5395ed0d4217ee92d6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLG661800393.