Daniel Manzano Salazar (born 4 December 1972), better known by his stage name Dr Kucho!, is a Spanish house DJ/record producer. He is best known for his 2005 single "Can't Stop Playing" with Gregor Sa
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 0xac400155af851dd3bff6b847bf16b38e0fef0f1e642d6b24f0a95e3b5906accb. 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/3b227a5d-d4af-4dd7-bcd0-2cf174a59b92.json and https://artists.proofprofile.net/proofs/artist/3b227a5d-d4af-4dd7-bcd0-2cf174a59b92.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa491895aa1d15464047f2a20ff67cdcf02edb0c65ceaa41b1242096821001281. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:23Z), 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/NLML60100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db58c983005b13fb4bf636cc2ae6f0ba7aa8909d785af9dc431b8995dde0211. 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/NLML60700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ba156b9ac5ceaca0fdc38f48493ae7c35e5b18b50e73b7deb6ca22389bded4. 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/NLML60400049.
Can't Stop Playing (Oliver Heldens & Gregor Salto remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d03e59b35af6626be6c7c6e4639951f9790a64570094272a086fd21a2f815f8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLZ541400730.
Can't Stop Playing (Makes Me High) [feat. Ane Brun] - Oliver Heldens & Gregor Salto Vocal Mix Extended
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b9a5afb9b0c87ab3045a8141d1e0db01e2d9bc9b9ae9c74a354932b9fa6097. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/NLZ541500026.
Can't Stop Playing (Oliver Heldens & Gregor Salto Remix Edit)
Can't Stop Playing (Oliver Heldens & Gregor Salto Remix)
Can't Stop Playing (Amsterdam Funk Mix Vocal Extended)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72261bebb92d38e80b146b584b6904ddd43a41fe216a13886983350503c542d2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWS2365570.
La Tarde Se Ha Puesto Triste - T. Tommy Victor Perez & Vicente Ferrer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18e9f9d22f21409b8ea9b5ddbfbafef3a0a001e0d4c29b05e50f2c53316f614. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ES60A1401420.
La Tarde se ha Puesto Triste (Pacha Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5182cb45f83230316f54590d4d2f7c744e9515320afe1ae06c66950110d0abd. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:06:49Z), 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/NLC281210033.
Belmondo Rulez 4.0 Contest Winners Remixes
Can't Stop Playing - Oliver Heldens & Gregor Salto Remix Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c4bb81eff4989b92a98329c46ec2e1d585171986bd33f6e6086af356c3f304. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLZ541400554.
Can't Stop Playing - Oliver Heldens & Gregor Salto Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703f04858d6f1e5d420685fcedaf0e99d180b7315e86dcea49d4c1d22f5342c0. 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/NLZ541400553.
Can't Stop Playing (Makes Me High) [Oliver Heldens & Gregor Salto Vocal Mix)]
Can't Stop Playing (Makes Me High) (Oliver Heldens & Gregor Salto Vocal Mix)
Can't Stop Playing (Oliver Heldens & Gregor Salto Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d03e59b35af6626be6c7c6e4639951f9790a64570094272a086fd21a2f815f8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLZ541400730.
Can't Stop Playing (Makes Me High) [Oliver Heldens & Gregor Salto Vocal Mix] (feat. Ane Brun)
Can't Stop Playing (Makes Me High) [Remixes]
Can't Stop Playing (Makes Me High) (feat. Ane Brun) [Oliver Heldens Vocal Edit]
Can’t Stop Playing (Makes Me High) (Oliver Heldens Vocal Edit)
Can't Stop Playing (Makes Me High) [Oliver Heldens Remix]
Can't Stop Playing (feat. Ane Brun) [Cian McFeely Remix]
Can't Stop Playing (feat. Ane Brun) [Cian McFeely Remix] [Extended Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae2604ebaf03d2d1202ddfacc43203b57838bef46ae228774447d485e306474. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/GBRKQ2585099.
La Tarde Se Ha Puesto Triste (2025 Pomboklap Remix)
La Tarde Se Ha Puesto Triste - 2025 Pomboklap Remix (Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9658a837ba506c98bdcc773300f0d477bc3da214f2a00d00f137ee06590946da. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBRKQ2570512.
La Tarde Se Ha Puesto Triste - 2025 Pomboklap Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948b0c33a9ea814d258998032e6ed32c50503e4f83f4a67ec4e45f572a33e750. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBRKQ2570528.
La Tarde Se Ha Puesto Triste (2025 Inache Remix)
La Tarde Se Ha Puesto Triste - 2025 Inache Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f200121777ae0233eff815511e537fa904b54703d22bc1d89368a5f5eca7eb6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBRKQ2570548.
La Tarde Se Ha Puesto Triste (2025 Ethnica Crew Remix)
La Tarde Se Ha Puesto Triste (2025 Fran Ares & David Treble Remix)
La Tarde Se Ha Puesto Triste (2025 DJ Kone and Marc Palacios Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842d4cfd0b8b5c781b5c4b31a7936000d7c96064e638f2b39d81ccb1a3bde821. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32511703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a89e4d6ad4a8200c185fb812ebc368a3e5b7bfccf9aa5087ba6abaf9cc59f92. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZWDD2517206.
come again (Dr. Kucho! SURF Music Remix)
come again - Dr. Kucho! SURF Music Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e2affb9bff724b90903d27c29b4369ea39d0de38249154a6697cedf5b073a2. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/JP92N2519848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cddad18d7eb0c27cfed3646f00af56f6d4b3b486825ef4f6e9b940c4dd1e16. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWDD2585505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeef22244a5f7df31b9b71d6d9043d34467940b0bc0a34d0ab7f2c7d196d6ceb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWDE2568438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e9bdaa108c5d527744b44f10167d61f0f5c4a153036eaa4b3b37edc149f48f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ8A2584580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476405323db95e57c3ad869826c4c47b4fece845527ef11ed983d91fa4614ae3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GB4PV1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3928c363f01380573ecfa2be7f97cb716f9c67be140d666fdf94524fa68515a5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLC281010494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc89c31dcc4cc6faebd148786e760747ae0478929059d06bd6342717c4b54f4. 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/FR6F31270890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed516213e64347c45226be363ac4ae8eec2fe2e04198799e3c5986e9de4207d. 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/FR6F31141380.