Theodorus Josephus Jan Nabuurs (born 14 February 1965), better known by his stage name Mental Theo is a Dutch record producer and DJ. He has recorded two studio albums: Back Once Again (2005) and Jump
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 0x5dee0defcdb125b4f1bef3ef8b0d64858946f991652f2acca16466379f32c564. 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/0a3a9bac-aef7-4f7a-9b6a-23e32dc58879.json and https://artists.proofprofile.net/proofs/artist/0a3a9bac-aef7-4f7a-9b6a-23e32dc58879.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I'm Gonna Live Tonight - Hardstyle Radio Mix
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 0xf742a0f8701d2abdeeb288fe29dd689ae4e26e3034c8bde3a54664366c6ac6cb. 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/NLY291300014.
This Is Vegas Baby / Let Me See Ya Dance Out There
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964aa8fddc165d7e6ffbe0b44f54e3c5610fdb12eaafc0a89588552d9114397b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:23Z), 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/DEMA61400840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8aadf0b0526fe7413d56ce9e21a40434e626fa390d0cd4a07a7a988e28377a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEAR41869081.
Naar De Klote (Karnaval Festival Anthem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977b2953a43c182f9cf57945ae11f21cdfd95e033e8375980df32fd1da10126a. 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/NLS242300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d22b01cdbc1bf21c9622a385864cc444b6b64bd9c5386f975ce373087deb28. 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/NLS242300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acf053d1d6ee6c1b4e20a0d765d5fbf43edacdf9ed484ed6d122b4e56c929ba. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/NLYT32300005.
Here We Go Again (Hard Techno Mix by Theodor Nabuurs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df6efd0cec7a989907c923e2fd6f08cf64864f60cffd8988a1992b6870cfade. 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/NLS241103129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b79a249ba1a93bb74cbeaddd8553e396d4068ed48c5182fb7f79896a55f4e6c. 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/NLS241100851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ab91aaa9c92d8c51dd79b1bc45984ca13d6099814002615aa39ad429767f2f. 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/NLS241100977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dc03b151d1489dc2293a3d80731121e134b3f27334fc371a2a6def7d0edca0. 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/CH6541989832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b79a249ba1a93bb74cbeaddd8553e396d4068ed48c5182fb7f79896a55f4e6c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLS241100851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df6efd0cec7a989907c923e2fd6f08cf64864f60cffd8988a1992b6870cfade. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLS241103129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ae188ecb6d137fa96e155e41b787deb5be18c364fc8145ec3e77405db2df4e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLS241103143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf116f76573bbbe66632a1dcb0ab16f48fb875f900a6f8e7adfa3172c0a70a63e. 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/DEPI82222086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fcefb0a394fc0d00a05c5bc619b6a7cdde4600032bc3ad95085c5e49c0d422. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:09:49Z), 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/DEPI82300926.
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