Sub Zero Project is a Dutch hardstyle producer duo, consisting of Thomas Velderman (born 19 April 1996) and Nigel Coppen (born 9 March 1997), most known for making the Qlimax 2018 anthem "The Game Cha
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 0x84de6a8fb6b90b7e95bbe44a4a94866571cec8186524b2fa747dcf52a98a250e. 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/72fa604c-0bd3-404e-ab91-e7a809956f03.json and https://artists.proofprofile.net/proofs/artist/72fa604c-0bd3-404e-ab91-e7a809956f03.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 0x221753309b0b1e647557e32aae8be4a870a2a029f050a208e3f8e3a8dd8ff2eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL4VT2100216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034c6d37503323c2d2d819c4011e5c7014fb70f73ff3f159611f82e3e48b8f44. 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/NL4VT2100217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d704bf31d49fa89d763b8dddef1768da82603b55570e79e3c3fb3f772adf67. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL4VT2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635d8fbd6df1d8f503a7220af3064977a929a463f669b865dfb507fa424ce305. 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/BEB682400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc17d679c5411f77af7932a322443589eb1311828019fdffab4eefe8e801af93. 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/BEB682100453.
Hardstyle The Ultimate Collection 2016 Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedbce5635403376d8ea623f12edb597a45d9c1ed8e1724b7ea15af932d56a05. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BEB681500470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aa7aec5d3fd6db974c8b1d3069163dab6cf6f2d5a12c883dac7761d7bb18d5. 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/BEB682400105.
Hardstyle Disco (Da Tweekaz x Sub Zero Project Remix)
10 Years Da Tweekaz - The Definitive Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4b03fa5d3edfe1ff93fc541685166045600f13e8f41c23c39be6fde111293a. 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/BEB681800317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365a2e16a6b1cd132d11ffcc7276f88fccbd9101308a89aa36e776666e927279. 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/NLH2L2300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef99e5d607e990cf0db8acc058dc99c7322c33ea9e7dcc185f428fcd2c125ac. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BEB681900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7561987ee575a5d24874ba6fe39b75edaa3a4468b63ae55763312f8a6a5e0cb2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BEB681700168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61dbc995f18cedf8e0254deaf230a7f30df5ea30381ca79d47cb31e57ecf4cc. 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/BEB681900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832aaa32b55eeb1cc94c4d2d916ff09ee80013581fdaf89cdd40ee9783b0ebf4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BEB681900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957d22a2380bee05810196c1e73bb1701e438048b012be16e2e79dc96b96ca7e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BEB681900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f0ec1843a720dd5af6eb064ee4c5829584f6f48df02b74facf18248cafb0a4. 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/BEB682400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223819efa85fc5ce58d67cc0a3c416904fea3fa843205b970d4eab4a96198da2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BEB681900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90957ce73cad86bcf1a8ab69b6c2904d628321a32f2daedc8ab78a9eae7b125b. 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/BEB682200219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a91eec292dbc370024de96eeae6e37b865b3ea015b9b2d06fbef3bc4f2e5b99. 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/BEB682200217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650a67e15ce21b453270b2ba746f148368c3e6fd81eb3a35f8c1058e7162aa18. 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/BEB682400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5027cd150290973e13eef9aa890810c33a4717e8b298cbb222b1c4c3dc149e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BEB681700026.
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