Jef Martens (), better known by his stage name Basto (stylized as Basto!), is a Belgian record producer, musician and DJ. He primarily produces electro house music, and he is signed to the ARS label.
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 0xa6fe3ee793b547b4a8a76d95fc912b4a9c29b6c68634ca598d954740f09261c9. 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/2ba2c158-c1a2-403f-ac53-cabc8c19ddc4.json and https://artists.proofprofile.net/proofs/artist/2ba2c158-c1a2-403f-ac53-cabc8c19ddc4.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 0x351d45a17df524ecff9ec286c2f86bed1dcffcd6516079e46df9d75875747eed. 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/MXF811200298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9db7c3570c4addb37b9281a77f145f12e1754e48b86649c17e067f87a996daf. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/NLC281112115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652b3bcce9cfba9127ca48a388daed3a514698ac09e8758735664d6d9191cf8f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/NLC281112114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0051fb471a02449655d1cfafe238b1b55217ce5fafa4aba98ed98001c2c08131. 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/NLC281011636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe221201bf30dd62b33e5ceb5e2a2773306660634cd1fbb2177631bf67f44963. 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/NLC281210134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652b3bcce9cfba9127ca48a388daed3a514698ac09e8758735664d6d9191cf8f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NLC281112114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe221201bf30dd62b33e5ceb5e2a2773306660634cd1fbb2177631bf67f44963. 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/NLC281210134.
Cloud Breaker (feat. Yves V) - Basto Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe221201bf30dd62b33e5ceb5e2a2773306660634cd1fbb2177631bf67f44963. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLC281210134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33c627ce883098140fb88b5866d4c49b415d8680ab1187ca15761c70559f04e. 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/NLC281210304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33c627ce883098140fb88b5866d4c49b415d8680ab1187ca15761c70559f04e. 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/NLC281210304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70669b5c334fe39cee8b03c8a007821958cfe093ca40155f65d68bb46345a5e5. 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/NLC281211710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aed3ce8c85b7c993df56dcbb846f8bb24eb15e51aaf221a47926b6e0d56034. 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/NLZ541300499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26c7f95eeaeb370e86be484ca8faef83a8e2f5f529f0f67af25a1e883bf4925. 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/NLC281211641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e380ab859626afc4f6cec1a69f19c07f0398f1725dd39e717c0df441f534866. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/NLZ541300500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d805d29fc2b8cc02904765d31ef13bb79424939eb056fa8f7cffa638bcae717. 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/NLZ541200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26c7f95eeaeb370e86be484ca8faef83a8e2f5f529f0f67af25a1e883bf4925. 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/NLC281211641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0051fb471a02449655d1cfafe238b1b55217ce5fafa4aba98ed98001c2c08131. 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/NLC281011636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26c7f95eeaeb370e86be484ca8faef83a8e2f5f529f0f67af25a1e883bf4925. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NLC281211641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d805d29fc2b8cc02904765d31ef13bb79424939eb056fa8f7cffa638bcae717. 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/NLZ541200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2164a7282c4d283b5b613c362cb6e09afac9ffac9b1c923f2f53559136446323. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLC281211642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c3d09a70671a4aa0cfa6b9e053d7385d6472cd9e246bcbdefb5a147e022cff. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NLZ541301569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e85e832ff709091a163a9272b2722d85c739886c43c445f6a68814e7c3ad6f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR52F1312001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60845785b20b81ae3c32b4ed72a42215097784420b0e2dc67b36fb81e378347. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NLZ291400050.
Electric Stars (Heineken Ibiza Final 2014 Theme)
Electric Stars (Heineken Ibiza Final 2014 Theme) (feat. Maruja Retana)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9e1d837df36eafca747436bdb9aa037a4dd805d5547e16cbdcb46b760568fa. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BEN581500152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f18ca703305f070ca65d27894622d4392b2b6575818dd0aa8049141957ae08. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BEN581600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07aa65485e6eafb065390b05b945c615758ba6f7737ab73b315237e3eecee65. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/NLE801800445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e38fe8b10dd7b9a4c5eb8d4b98c50e3af7961532bd9de708f98b2c3e7dc51bb. 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/NLE801800447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcb655cac998c9251b61900248792cf6c139a8bf96e9de4f526fb48d8312fac. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/NLE801900309.
Here With You (Play It Again) (feat. Nat Conway)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414786a6bb2586a4d582c8bbc3992116a13041b6d0307cadc01dc0f006b1a058. 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/NLE801900616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d9a9d0451de3d56a47b406c71e4c174349d327952797bf98169c368284b7c1. 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/NLE801900618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5ef29027b5e6fcd2d056753121811e2b5597c14b8b4e69da9da6f348066d43. 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/NLE801900670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317b83d50d23f302279cf3aaa8b0c6c073cb1d049f1185282cf084eec46952e2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QM6MZ2076594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d635628b6aadf67f2e3d27a6fcfd73e195fd615afec81c0d3957c95ab82c8d. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QM6MZ2085055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3107b58b11dfc74855e3075b7ec7fc9a9398428f42a053947a6dc86d51a600. 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/QM6P42007899.
Bartholin's Theme (The Extended Experience)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bad7881a74709e8fd6b022cae9e06a8045340c664399ebbc699d26e67d7b339. 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/QM4TW2331802.