Marche Lashawn, known professionally as Che Noir or Ché Noir, is an American rapper and record producer from Buffalo, New York. Early life Marche Lashawn was born in Buffalo, New York in 1994. Lash
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 0x2656a68c6fa6ac5fa01b8fc64fe51195f13df758c290f26823dffb06164f5177. 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/d771b1ab-f7ba-4707-acd4-e15a4430b3c6.json and https://artists.proofprofile.net/proofs/artist/d771b1ab-f7ba-4707-acd4-e15a4430b3c6.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 0xfb3137edaa5f1a492b44fc074b779c975b6e321ba1834a2cd7666004126f0375. 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/QZSYP2366636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e4593996e1b20fc45ef99a686d5e8cb42c1c35be39a0573cfc7a0783c9c866. 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/QZSYP2346271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64e1fb651fda7f2a22a5cafee1a48f77d37a53bbe3510a19dcb85611e9ee4e1. 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/QZS7J2302515.
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 0x6108fffac259a3e7f4a52907fd0590fdb2d3e7d0b316d924d8283b4530cf0df6. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZSYP2324156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8949c908aaefd4b0a601e7c8c605ca9ac949f3344f718d958b0e4f31f349386. 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/QZK6L2039531.
Price of Fame (feat. Ransom & Che Noir) - Big Ghost Ltd. Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb66595fcb533c2834543ee93748e33a46518702d0ccabc44e4ace0bfea519d. 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/QZNYS2100060.
Love Left (feat. Che Noir) - Big Ghost Ltd. Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ea8d4ec0cfec9d77bee511463e4d40977c2b43a67e60efdf237cfa06b9a667. 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/QZNYS2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf4ad291bff20dabf05b29e748cd62aab542182b07c02c64eceb09fbf78bb4e. 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/QZNYS2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f459f2b146867c38a8b5e833cd205b36412647178d7337558938030e73a253e. 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/QZNYS2100049.
We Outside (feat. Che Noir) - Big Ghost Ltd Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306bd852e0c3d2ccc53617d01cda5231678c4a1f8547b8470f6c55113d2b9498. 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/QZNYS2100239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d36f1799f1561baabf291bea19058bc7902066f82274516cafc01bf68bd79c. 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/QMDA62337386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739155846e567c681d19f3c8cca76cbf6cfd55829a79850702e576a0962e7cae. 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/TCAFC2040231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c0369321c97ad69f8d9ebb593e58cbf574307da7c9d875aff0e849a72e5ae4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCAEQ2091361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de26993a028d2614e764181fa0a64dd5e3fcb6c8480bef412432b7882d02157. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZQAY2367582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7defcde39bc9076bf6c494267e0d5709df8466a6bb2c5e154d51c5d2200bf66. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TW2188131.