Project One is a DJ and production supergroup consisting of two Hardstyle artists, Willem Rebergen (Headhunterz) and Joram Metekohy (Wildstylez). So far, the act has released an album, an EP, and seve
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 0x851f302d78a0e466da757d11d450e7c3eeab2f37ea1ab087e1b355563f6bd293. 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/5a2893c5-522a-48e7-aaec-e6423790724f.json and https://artists.proofprofile.net/proofs/artist/5a2893c5-522a-48e7-aaec-e6423790724f.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 0xf49f208dd067e485584fdcfba67cf49fd5ad65f72dbdf544cfed07d7651483f4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLH2L1700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988e26d7ec410d325252ed74bd9f7202a332636d5b3f91beaf0090ad7c4d8e5e. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:02:08Z), 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/NLH2L1600261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05da465eb5813f80f7df5514fc1322407efc05ea3af9904d804017e8fc95c1c0. 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/NLE801800477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16460a05a1c6d68a544f99a693f7a36c68947266e7722bc52760f636c4442ebc. 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/NLH2L1800225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce28b3baf885004f52cc3c3cf5564de8835fc787f59b84355097685c0a30e8e. 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/NLH2L1800228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8fa2d7e2841b9d3cd05cffbad538787699e372fa93ee14b14f1a5f56d823fe. 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/NLH2L1800227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538b3c92376a839fd9dae2fddaab6edc9ef938ecdc170effe5ca5d047ea865cb. 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/NLCY30801834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbc717e767546beeb3639d0719298fe3d82cb8723f413032862add22cd08e21. 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/NLE801800533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602b0de50b3f101ddc80857e02d82a5326cd1d96e72004b96004f90ae8162ad3. 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/NLH2L1700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbfb474752c1d93e8af043f2d6b29e9c75b2515a09f429dd25d511b611a8b0c. 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/NLH2L1700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7ea3e6c5b4654a097168aa8304c2ee476ee4bb8d253323098ff3d6d9e2208b. 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/NLS760600163.
Hardstyle Classics, Vol. 4 - The Ultimate Anthems
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee45eb06d12743eb81d995d6d043a449c1ed956aabf9a81c82b079b28760ed. 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/DEL710820024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf35701d5f9ce2baaf9603237e4bfdc68943786475bcf8c092157a1e453da2d2. 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/NLH2L1800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1b2401748693bf89e09d2170b7c5da64d6d874587b8d088727923c56fd80e2. 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/NLCY30801843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05da465eb5813f80f7df5514fc1322407efc05ea3af9904d804017e8fc95c1c0. 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/NLE801800477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16460a05a1c6d68a544f99a693f7a36c68947266e7722bc52760f636c4442ebc. 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/NLH2L1800225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abc430c7069470f608aa4bee204363d1e357ecaa7fdcbf7061df9a29066745a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLH2L1700081.
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