Leendert Wouter "Leon" Bolier (; born 21 October 1980), also known by his mononym Bolier, is a Dutch trance DJ and record producer. Biography Bolier's career began to flourish in 2008 with a number o
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 0x1bcbac472fb19f51a41f5e65514efaefb4cdef31eb5de047c862954a35ac6216. 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/0fe1a56b-7b4e-483e-bf42-d2d99a27e21d.json and https://artists.proofprofile.net/proofs/artist/0fe1a56b-7b4e-483e-bf42-d2d99a27e21d.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 0x10ee2fd04cdfd28eb9ef84ab6a8e5ff2bfa517829695cffe97d561cf35be954b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLF710600970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225c296050bdcde6c7fdf5b48fa0071c0415abb7baa9d1a6c1500618ecbfb626. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLC280810469.
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 0xb1b1e46091003102b28debc2c9677a0109679bdb23967fe44ec818ff7b34ab19. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLC280810183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b82757dc7d4a97578995057c2ede4d9c25512e8cd1d3244442390e36b5b14c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLC280710382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa80d1638c73362a6a4510389c58c463a8d1755967dcd28f4811e138244d0b3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLE800800143.
I Finally Found (feat. Simon Binkenborn)
Streamlined 09 - Buenos Aires - Mixed by Leon Bolier
Streamlined 09: Buenos Aires (Mixed by Leon Bolier)
By Your Side (I'll Be There) [feat. Fisher]
Leon Bolier Presents Streamlined Essentials Vol. 1
Streamlined Essentials by Leon Bolier, Vol. 2
Streamlined Essentials by Leon Bolier Vol.2
Streamlined 2011 Tunis mixed by Leon Bolier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ea6f40b5878da9127f35572a36f83d54135ef6c1bcf930c88d93cb648fb502. 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/NLE712000622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60d40b48e244cf66e0f2ffe0498f1ecc0f2cf05107926078c14dfa58add0ad4. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NL7QW2300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7901f7f0a6acfd3b58283f54c1dad754255bfc1c5f6b627c3ccefbb13708688. 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/UKRMQ2400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf737f51b85bd87d3100fc8f0e71248603e99e67ffdc6d5afca781cc7483b7049. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL7QW2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330a9c610186a5e807d35995367687dce3921e374eb5f86969876c50b16e538b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLE712400605.
Back In The Days [ASOT 229] - Original Mix
A State Of Trance Episode 229 (Year Mix 2005)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4e7af65975027c09064c972157d3f6f0a1d4d951ca3bb69f473c2ba355e4e8. 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/NLF711313680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7fbce24228da134d93185f83c9c5cc4cff126bf7248fbda08ced6c80a44974. 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/NLE710520843.
In Search of Sunrise 4 Mixed by Tiësto (Latin America)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f268a8d5f2592be60a12ded97050b06cee52976c6a80eb598550009921c58a. 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/NLD681802917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241a235a75cf7c1fd4def0038d5e2403de09e6987290cede2110111af2d2d19d. 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/NLF711103066.
A State Of Trance Episode 281 (Year Mix 2006)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdae67a3c8de6101cc41db77da64f0a57a01dc9097d4910ee67907e4d5b501b0. 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/NLF711313639.
ASOT 978 - A State Of Trance Episode 978 (Including A State Of Trance Showcase - Mix 010: Davey Asprey)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeada62d42ebaf2bd20d75ba7f38353a6e1490991a716a5b96b57fddba1492d78. 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/NLF712009769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecfe2ba6fb4454946ad56ff46b0d5e0da31bc1e5189ab73e620cb35abf6813d. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/NLF712009768.