Martijn ten Velden (born circa 1972)PS Interview: Martijn ten Velden is a Dutch house music DJ and producer from Haarlem. Biography Born and raised in Haarlem,Biography Martijn ten Velden at djuid
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 0xc5e1e6f87ea0fda82d395450112e022609f14c7dcaa698b0d947ee5dade65c0b. 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/6e7c8421-977f-4e73-92e3-40bf89107031.json and https://artists.proofprofile.net/proofs/artist/6e7c8421-977f-4e73-92e3-40bf89107031.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 0x1c1934cc48059ff96f94638dae2999d42981b920205e2b97ceb46c411869abbf. 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/GBCFZ0701698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6750d7ef81171397c594e2bcc93b19fe9bfdfabbc15f64548f70394a1db8881d. 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/GBCFZ0701350.
Martijn Ten Velden & Paul Harris Present Toolroom Knights
Toolroom Records Selector Series: 3 Martijn Ten Velden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828d706f861c40120f359354143a6f2a45d94d7be3b983d30b2aa0a13e7a4033. 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/NLF711803196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6846529c4f39deffbb1642d0f2055f53b5c222ff1b0d6253cbde266d05922d2a. 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/NLF711803198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7092c20536e3305e7f46f8d2a9ca53979d5f58541dcb6bba8415faf5e21e842. 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/DGA0P2401949.
I Wish U Would - Martijn Ten Velden's Revisited Mix
Armada Deep House Selection, Vol. 9 (The Finest Deep House Tunes) [Extended Versions]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0730bffdf60bbdf15d0d32a04fc347268d74248c503a79ae8fcb9eca76f66e8. 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/GBFKM0900078.
I Wish U Would - Martijn Ten Velden's Club Mix Revisited
Armada Deep House Selection, Vol. 9 (The Finest Deep House Tunes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4fb0ba082fd1225b354f2594ac7c83591044e5a71f7e57118b775357d57ee9. 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/NLF711506925.
Who Dares to Believe in Me? - Martijn Ten Velden Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902e416196717dbfc3d16fd4e80722ba940e7854026b93adae0be35382fe2e7e. 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/GBDVG0969201.
Perfect (Exceeder) - Martijn Ten Velden Vocal Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e60d8ccb971d3866a0d82d044e5b90e75c509c2d105aa7e615ea3ad73330425. 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/NLF711312392.
Perfect (Exceeder) - Martijn Ten Velden Extended Vocal Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7b79730c8d1922046f25d8f5971a87b9120af47ab667033d7eca75884833d8. 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/NLF711312393.
I Wish You Were Here - Martijn ten Velden Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc471ab9d296ca825a68f372d2176868a8b0d742c5f46a168cc898e8f7d8387e. 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/CARE92001335.
Strings Of Life - Martijn Ten Velden & Mark Knight Toolroom Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e45a9d208e57214e407bb6c603fabda6093cd665ef85cfd4a8752b312fa194. 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/GBCPZ0401056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7597a7aad87b131080fbc307c19ebe25b2f4f68ae96b2803ed115d36222a3e1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEW871704983.
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 0x0fa39ce7de905c073befe2f99b75c8da422fd087f10f0c6cd03d0daa078ce683. 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/DEW872302291.