LK or negrailk may refer to: Businesses and organizations Air Luxor, IATA airline code Marking of Latin Kings (gang) Luckin Coffee, Chinese coffee house chain (former NASDAQ ticker lk) Science a
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 0xcd244e1ba26e7d75fc2b6c8df37437c2c6ea35ec5a0b0bf02ecefc163849cfbe. 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/d9c407bc-ddaf-4fcc-9868-73d2d0983ab9.json and https://artists.proofprofile.net/proofs/artist/d9c407bc-ddaf-4fcc-9868-73d2d0983ab9.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 0x72d38e4debc60b155d28a9952c22d3088040576358fe091637bed761400b5a8d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX282216327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cc5daf465a15407f78ad8392faa69aee0e34d8afb2b5235b1ff4f09e9be31f. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/SGUM72301706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2980447ba2fb6722286f0e19229fd1a39156edd70f2a4d96a96aa6c0791ebaf9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SGUM72301717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cc5daf465a15407f78ad8392faa69aee0e34d8afb2b5235b1ff4f09e9be31f. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/SGUM72301706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b1f13c727e1ccfa0088f8c9a5367d398df8941e584a3e4eab4fcb42ddede02. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/FR96X2209453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef15b9a21b3ccc684f5ab36a10fe1a06e61bd63c471f8a7ff6c85504e26fb92. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNJX2513754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5839b64a0caba5d51fcb08304cc603182ff2c43cb1bbe04a95d32d997af22c82. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNJX2513756.
ĐÂY LÀ RAP VIỆT 2 (feat. Rhymastic, Wowy, LK, Karik, JustaTee, Binz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf6822da5c558e2e92ff62d38c8840d9c6e05a7f88b9c48a9b6c435bd3b4a93. 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/VNA112100194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92c2ce7f113ba830b82ee7438163cb17031d8838c71872b53f643f1f6016de4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/VNA112200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e3ee1959e67cf894560eab439c3de9208c1cddfe5339714323dcfef45936bc. 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/FR10S2155008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9667663527e5d35ff47b6b5412be73ff15f6a016787d3f78ad375ab534db999f. 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/SGUM72000105.