Laurens van Rooyen (27 March 1935 – 21 March 2024) was a Dutch pianist and composer. He was known for his cooperation in the theater with Herman van Veen. He composed many pieces for the piano and wro
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 0xfce335aa1a535d9bad10cd0bebe92555555f44c102fb6b3f40e4300c82159f91. 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/fb56aeee-0c79-4583-8537-29a1b97d6327.json and https://artists.proofprofile.net/proofs/artist/fb56aeee-0c79-4583-8537-29a1b97d6327.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Een Vlucht Regenwulpen (De Originele Filmmuziek)
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 0xdbacf115d2e686fffcce8fd26a6fbb74e00e3f14ee4dcd01bae21144e71ca2dc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NLA309600258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510d839bb64953e540c5969671418b5f639f6b7141a3772a24de063a06e6c35b. 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/NLAX70924138.
Brandende Liefde (Original Soundtrack / Remastered 2025)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822bd54f53d739bd19a643c8867db749f585dc6023586a8dfdaf600026518cc3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLA308400020.
Plays Falling In Love And Other Beautiful Themes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e8ef32344d477fbd65af7995ab3775b2905994b91f8e22f99b2150167b04f7. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NLUM70800793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52adebc206909b9e97fced53c62159b67f11f66fd2fc711b7d93be984cc6c1c5. 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/NLA308500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14a8fe71b76a5ac6320b69a74c7b5407a3231b26563b2949d364b9d30d742d6. 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/NLUM70800798.
Laurens Van Rooyen Plays Falling in Love (and other beautiful themes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0fc83bc45956448607ee267b51acf410b6f7c5a880d87ab6110acbaf399366. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/NLAX70924115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8d45b257f20010db13aaa02c7997ae47c40a3e65af48dff30fb18eadfce626. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLAX70924121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddc0e272b713ec69c0c2811701d3c598e4d993ab2fe8a82118ea92e60808b46. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/NLA308600458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d6177de5f7f15f7ad4d95f5e06e0e93f1c363b7d2064a25d730036f48c5a19. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NLA308600460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2a55946c3e4dddd0e87b0fde0ba0b461f3b6a3ed2c15bf4d306dc0ddd7893b. 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/NLAX70924128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa78ae1a48e488675995e5e5f301e4a57f9c29925013fc805691bd18b9bc2f3d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/NLAX70924129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8c2284ddfefa30efa3310384c054a7cda2c5fabaee81ff610b2b35eeb4b29d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLUM70800778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0981bac6212cac26a99f1ccf60740b8b20fd19884549f6a8f8206d5a40dedfa2. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/NLUM70800811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b95f875318240f937d4e3dcdcdaad3df8c9fb0b7e903712301eb3dd1da0b68. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/NLA309000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8e88c8d2aaa7c9a8bd1c9f0aa981813886a127cbb752175c0b3a99dc01feda. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/NLAX70924078.
Eline Vere (Original Soundtrack From The Motion Picture / Remastered 2025)
Laurens Van Rooyen Presenteert... Rembrandt
Eline Vere (Original Motion Picture Soundtrack)
Romantic Beatle Ballads (Remastered 2025)
Affair Play (Original Soundtrack from the Motion Picture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3662aaaa559d9ba47c0e0f160403b1c9009840c60fa9a310f2a425ad2d202c9e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLHB40900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5431cb3c1a9aa124f19e96d7abafa39ac1ca4a8070844ed93e3e710fe2d8620f. 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/NLHB40900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de02f374b3ce4913148e849f29d90146ac00896dfc49d753bd4d8fdc26e2d55. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLAX70923914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca6ee24ef4015300a97e70e782f350b1574f6d088495ac131def12c34206929. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/NLAX70923916.
Van Rooyen: Piano Concert in C Major / Piano Concert in C Groot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310635a2380408a8e67266425797e8b537a3bacabb5c1848706448f7dcb1beaa. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/NLHR51134094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbda521bc5ae1761b24aa8c58a2481334eb69168f2fdeb3f13d7c84d6f40ba83. 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/NLHR51134095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bde49e2c08e5f4e1123db770075538374ee90f7e82c7c3a6a24aa09439c4c4. 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/NLHR51134100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa06009cc1c8e9a6a5141dc03f1eddd3a2494fecc9ca6f5d776b0f6b149ce25. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLHR51134102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ebe2375ae69ed4272592446e46f6996ad0990ed7c83b6d31f8f880a51b1b77. 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/NLH9T1500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5d607a1c4087adcb495ed9aa888c93285d23327146e41ef69d4461ea78ae07. 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/NLH9T1500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dddd072555d95ebd79632612570bee6e04739223a4ed483d59a78615605965. 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/NLH9T1500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd77a094f3e8ce003140c682cf0a916e0492c4c7d5dc425f6007588981cb31cd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLH9T1500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129e9627787b25748bf468caa50c82607d1bb62c7bfd1638490fc108f659819b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/NLH9T1500120.
Trance from a Distant Land (2015 Remaster)
Scarlatti and Friends - An Old Maestro for Young Listeners (2015 Remaster)
Piano Concert in C Major (2015 Remaster)
Symphony of Wine - The Story of famous French Wine (2015 Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5676345f1a535c20ab86cf8b626ac49e97c3e209ae57bccfec004da4622d8aa8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLH9T1500135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bdf89520f54b5d9c3ee921982df625e100dfd330b0b81b540791824bd48eba. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/NLH9T1500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053eec4586f66cada7bab832e54dadeb8571ff2d3d6b72211f158224af150ce8. 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/NLH9T1500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb63f79d876189c8b7f878af568b65e0343733a09f28305c3e974399605161e8. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/NLH9T1500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ff768a2b759fc09e8707038e5b2ab9d19b02ff2f20d94ff40ae1206840e706. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH9T1500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3a8a77158354fd7f59f42f14a2896d1562c31dd856f3a62278ec9c3b2a8505. 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/NLAX70924174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccfc815bf1dbbc94a117b020a6abd72e1dc57d122cff129865495b91555ad1d. 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/NLAX70924175.