Anthony Pengel (born July 10, 1976), known professionally as U-Niq, is a Dutch rapper from Rotterdam. He was part of the rap group The Most Official. Originally interested in football (he was a youth
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 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 0x870be22003cc5b7079c39c8b61a346d768f03f504e0e1b14dafd95f25c1dee3c. 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/8ba22fd1-08e1-435f-a065-1fd74a345400.json and https://artists.proofprofile.net/proofs/artist/8ba22fd1-08e1-435f-a065-1fd74a345400.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 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 0x87ab67de69675066553d21aa869bbc370671249f5aae318c4d4e6ca9451f673e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLG660600055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d035eeaf9b63f5225588f586642a6ce86b5d3c076eac5a23a6aaf32c0f13ac6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLG660600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32430bfbd3325459bc7c9d0b6b76474d9fea16df3dfac0ef001776d92c462953. 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/NLG660600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de7664dc73131c42bde17c76bff0ae5cdda418ac1f65d07fedae52494ddab5d. 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/NLG660600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b89eda06b314f569ac7ff5f11be8d5b2d6d20a4d23451ab3d944b9fed573a45. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLG660800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2098adc49d636759bef464d1244b269f0cd31a95251148de93e8ae06ce04adaf. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NLG660800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70fa8211c29cd100685aa7e3c5889d71121b3eba6bea971c611101f0f0134c2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/NLG660800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d8c568d88ab1b10eae0f2ff2a152d109a9efb5f9ca33679612d018381d0a6d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLG660800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7921fa3262f8123a41b9e8ef68305f62caa10cf53d7d24b4812f3f8065287f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/NLG660800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2af4c9ae3df7091957c0969bd00652faf0f59854da75a2a34b7598ef7894a29. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLG660800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3138961480e1919cf47340b2aaa0f610050a2a95442e7b954db3cb57ee72b63c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/NLG661100221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c22aece2351bcf062f82780b5d6cced08705e127d9c400fd7309d916d64fd12. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLG661100231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d2c3e9d673881bd96ad8425e60218be6beb97ca0bd2ab3b51e24c30900d79e. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T08:13:46Z), 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/NLL6R1701250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc694452b6251a766eb80dccea01f5c33eb9c58b6a65c7a4fc8abc38b7f085d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHNA2029419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5d7f660887abd5e5d814321b8496d50fef9efcf52f38d43e4960b0a69919ad. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6J2055598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d915e27330587805f08f2862670ee25ed6dc65f9e8602cd04c2374497d0589. 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/QZMEP2052980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771cb3b95f91b55faa236cb2a343273cad756c0ad93c87f8747fe1cf214851f6. 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/QZNWT2087139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667cf1f349b5f71da5eaedef706b1b1523dbe6f3dc311e2a2c8bf02dd87b6c30. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZMER2048348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2477a097fb1867cfce740a55e447cf9494d6dbc6f07b8f34e62b505fdd4c8d. 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/QZNWT2087140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd4c48f95d6492dbb139bf7fe34e63df8fa03803c1a05718d8408348f19903f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNWT2087141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3b3e05e7a9f63852f316e89dae644bc13ed30a2cf9ff27d8896009d49ebd26. 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/QZNWT2087142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7607b8551365a1dd371bc154034458b04972974313ef67fbdb12a9c25741eb54. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZNWT2087143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85130513aafaf33d54b9940defdb48cd45d826218690e1cdfa3f21029510c34e. 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/QZNWT2087144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cccc69e477c54be34234a00c1cb1c6d275da221b8db00c1848fbe3b1e01ea5a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWT2087145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4637348fe1bdab11c292733b2edeea289805d799687224152f23b4c3c4c20e86. 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/QZNWT2087146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2e7c50f601ce96d4407dbbb041bd3321ce23b545724b0f1a60a999503dbecd. 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/QZNWT2087147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfbdca253677f3467a5e4aa44f19c6b0dc18170b4dca912501aff3cb093144e. 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/QZNWT2087148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003d4bb167ff2c4889ec44eb120c86381ff5add73fc0c8e4bceb587608f898ed. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWT2087149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5d7f660887abd5e5d814321b8496d50fef9efcf52f38d43e4960b0a69919ad. 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/QZK6J2055598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828637f08b58c4802c724f4b278aefb886e6248fc036231d9c8679aafb25cc10. 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/QZNWT2087150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d4feaf80c557ad4cf37eadce126227761098ef6716941e2e973a1d4d84b91e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6J2137822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901c751726b2c01d5af0b0f10c726634fd8089b0656d3716a1db8b6450b8930c. 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/NL5HJ2300295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a960b88a881364968166eeae2863ae924cd25f3e9011c827ec46610bed7b8b3. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/NLY9D2100036.