Wolter Kroes (born in Wormerveer, Netherlands on 24 December 1968) is a Dutch singer. He is best known for his hits Ik heb de hele nacht liggen dromen, Niet normaal and his hit single Viva Hollandia t
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 0x2b29663af7479bcf723849e654dba9a261552a231b83690356a5d03657c7cc42. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bd1c611-81bf-4782-b1ce-9da6a04dda59.json and https://artists.proofprofile.net/proofs/artist/6bd1c611-81bf-4782-b1ce-9da6a04dda59.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dan Pas Voel Ik Me Vrij (Dan War den Ersten Stein)
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 0xe9ac48fa7c612cabb0556ec3481402a8b59909810813a0a3ecbbbe501d642a9d. 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/NLC289700112.
De Dwaasheid Van Mijn Jeugd (Hier Encore)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174f0742205a9d45efb4101e7662e9936a4a9f946546b33c7ccb09c0f83c0d9e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/NLC289700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3ba63844529816de2ea864a4158759bc70b727557f02811c1e3c0c37c19277. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:51:03Z), 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/NLC280000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1dd11187f21730e04fc8815ad38fa990e4d0b6b11e9848af063c234f68569f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLC280000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b707bf1d7f65d531e12377b79b32045e04404adfa92f6e04eafefb3b27a7ee0. 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/NLC280200056.
Ik Heb De Hele Nacht Liggen Dromen - Apres Ski Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a2063c219767a65b16dd11b8a4b954148744e2a8fbd1a0c0142d03ea91cbe. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:47:52Z), 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/NLC280400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0952afdb3472bac83d2859f4d94f70efe8ad15bbddc8ff1b380be7b5aa457d2d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/NLC280500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04da470a16ff372a6887ec0e7d556f468022c34d5ca6cdb2e1e0fe729212dab. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLC289400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d8eba272684ab312ad2bd5e816d24f5bea4672821aa369ca5fa4a7fbe392b3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLC280300070.
Wij Houden Van Oranje / Nederland Die Heeft De Bal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dba22974cb7cc27b3540f6aba5101f56142ceab77c3ce01733fae8e734f3a8. 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/NLC280800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be4b64bddf02876e60649721046759b78d1bd9914f05713a3a7a6809cfd4794. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLC281000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d29772df643812c4d68f0a8e63f17bd26af26cecff9f5ef4f86eaff416d9792. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:34Z), 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/NLC280300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2373efdd03ff07960fa639f8000ee825d1c27f89c1301625964b97f338f0ef. 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/NLA241108211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b33dc86a3ee8454dd41530194569b9989db925681241224483acf720a0edd8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLA241108108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c3c5cd2d785ada24898ff51e5665faad57106cecf3a734faa1ee7305ae2c2f. 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/NLZ291400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aec835f16dd5d39de58969431ccbbf86c76b85444e3a321d9b37d3ec368556. 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/NLWJ51500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6ac3421024c4128a995756f8a293d2a3587cc67e1f8c8a1c04ff9cca13ccd8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLWJ51600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c80073bc3ca2d80819f5d74a043f5c95f0cf0ca56cb81635af183e2726f326. 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/NLWJ51600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db3c629703e61ec515ee8f030c5799b11076025ab82256ce42036812603b4a1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLWJ51600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35366d68cdb7df2278175215196242f22bfea9cf71a0b5f1850b0b03869e26e6. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/NLWJ51600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dd06fed15616a773c3fc77d4ce43a0e4bf9544c0ac8a8e0135ccad2c4685fe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLWJ51600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf14c53a15c7954a1d18f4ba49e25b0895c5c45f7ad6bbd975abbd0095579fac. 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/NLWJ51800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bd9fa11e18932de04e2b52b4abb2d3d0a3a1263397095a1eabe186e6bc3711. 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/NLWJ51800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a64c7bd7afbfd41a4ecafd05e83402ccf3fff73f9ee362983ce5f0a844b7c9f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/NLWJ51800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac05c2132e83f2ccbeeedb86b6125aa7e8afe029481b9b85e6d39c5c2ba1077. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:30:03Z), 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/NLWJ51800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361e53c7fba794eb6f1ca6d98b2359a7189bade1701806ec9f70c137f1604dc0. 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/NLWJ51500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3517cec455ce2343ccc964f0e7bee485ea892d326332f83cd1685cf309a912. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/NLWJ51300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0088a10fa6e0ae8215185d47321357b52604becc8b28050fd63ab8dff28a6a5. 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/NLWJ51900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975dffe52159385314af273d49da3c504490db5446277ae42fcf9b3820ffa306. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:37:44Z), 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/NLWJ51900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c44cc2945cac6b37d33513d0a675b8b57eea3fb64389b43b0748a92e9a8e18. 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/NLWJ52000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9463f9ff5513c8bfbadc1db6dc111a2b4c919cd9e052f1d51b7f4f8e498bf204. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLWJ52100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0381b42cc0f9142ee0196813a06d84cf434975c04cd31e87b33fd503bed6a2dc. 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/NLA6A2200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8eabe94214d3c98c18db4605c414cd09dd4767a3dad557ca875e3e72e1322b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NLA6A2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef71244a510817d0acff6eaac3464754c06a134f9c5990581233ba8da0ded93f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:23Z), 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/NLA6A2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd46ba75c88902c65d642ee155005b93fa110c69b9b2b8cf6e3aac5ff6db4992. 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/NLA6A2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970cb413c824f8bdb79ff55a4da3b4c895c643b22f3de0f3fae5c381a8a0a2cf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLA6A2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021dfb36f1151efbfab9c7359d2049b6deca9b9f84677078f0773a2a78cb6863. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NLA6A2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776ef44f62114ff4ba002aef0d8ade8d4ec0bb836c5d02e64f2e7abbc0835e7a. 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/NLA6A2400046.
Wat Ook Een Ander Zegt (Live in het Concertgebouw)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cddddf701356c80e1c21b2f532bd2c855a39471c54c9056301031e40b00a00. 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/NLA6A2400104.
Ik Ben Je Prooi (Live in het Concertgebouw)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45af59b1f6ba13d93d147b74961e1c7cfe4a564aae9b94f301c26b1806bf3605. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLA6A2400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f51b1f4e66086b2a04d02763fd1fadee4375e41a49803bb1e673ba4d2d8ba1b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA6A2400156.
Het Beste van de Beste Zangers van Nederland (Deel 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8fdd81a3587196d9866b6f9c340b0f8f3a320d01d06771b90fae0acd8f34fb. 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/NLSU31400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f6781ba72ef7f5cbbe793236add5cbbcd00722f4d93e7365a648258acea548. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLC280000061.
De Beste Zangers van Nederland Live in Ahoy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8fdd81a3587196d9866b6f9c340b0f8f3a320d01d06771b90fae0acd8f34fb. 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/NLSU31400067.
Ein Sombrero Für Guan (feat. Wolter Kroes & David Civera)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb506e0d93cc80b5d08ffa83142538664b03046a1b7786139a4267f00cc79af68. 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/TCACZ1783435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8fdd81a3587196d9866b6f9c340b0f8f3a320d01d06771b90fae0acd8f34fb. 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/NLSU31400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45836e4feb4493d12a5278617351a50d5ed801df956fcb9c213e821a9ed1d15c. 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/NLE872176105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945752f6afb9894be418af64e53bd09139754354083c7e48e3977acf1c6bcb79. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NLE871334502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945752f6afb9894be418af64e53bd09139754354083c7e48e3977acf1c6bcb79. 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/NLE871334502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45836e4feb4493d12a5278617351a50d5ed801df956fcb9c213e821a9ed1d15c. 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/NLE872176105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1210f7a435773e2b61eaa9c4befcd632edf94ef1cfa2c4f0e5aadfb79b3ee26a. 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/NLA270700456.
Leven Om Te Raven (X-Qlusive Holland 2023 Anthem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc881153d73bc15f0c3fd7b27e63699ea42add850c015f9c14968a043f368da47. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLH2L2300194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b32aa2bcd68d52fb4c6f0dc8db3c6e96dc455cafe7ae74621acc57082ae9f3. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/NLSU31400068.
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