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 0xfa4fd21cd64b10fd11a1300bc1d62bc4f336b53d9a60d2b0cc495d18457d8b39. 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/dbd37117-0912-4118-8c39-7be345635636.json and https://artists.proofprofile.net/proofs/artist/dbd37117-0912-4118-8c39-7be345635636.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 0xc1defc17e1639994e483b1f340da25450f0b698013741bedfca9a37b2d14bc79. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZHN42402014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05eb638aa4a91675259c4f8236a0939ed4abd7a8a8e17228147c583b32d77f4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:03:27Z), 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/QZTB72468126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cef458cb8dcd2d588f63f8123719fd284b96ce4b26e007093a026504bc4019. 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/QZTB22558552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f5bc5ac8e818ce8773f7fa2bd1d92f0b5b5c68f044585d673c6440c311a487. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:13:14Z), 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/QZTB22558554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc17301aa64b6f8e692d4cd49fe29a9b0ffc6fc36a1edab9b4135e0f2ffb57d1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB22558557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254560c9493f83f0e3ee30e4772881b9bfaafb94dbe9fc8b4a9942689a4eadf0. 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/QZTB22558558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f37b0a88cc98baae2a45dac0cdc1880153ca9bbdd08c2b8a2818feaf1c8b0. 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/QZTB22558559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa32a20127991a57e787b497937c7378a008b3b4d4ffed8e674072581bfef1c. 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/QZTB22558560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e2c0b5d92c2077d223b44557df84f9a052d7a07456bc64fc6121c992ef8e12. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB22558562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dd7805911889e6e2f404dc4969ff98a6079fe3750fb2cf8ba32a6032a67114. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB22558563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d61a9f2989546dcb63cdbda35e14c72409fb955252341626c1f2597244d9437. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZTB22558565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea6c52d557138fdf1b71c1936403b6bf21e45cdb7194c6292aed80ca40535b8. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/QZTB22558566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535f9367e84ff41c2ad63ed6fa7292098b08b7e7cd91d8ca8a68b72022e87528. 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/QZWFJ2325832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eb190b937bd9df994d764ab8002928f0a356d8289a6e3a5dade9b060584dbe. 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/QZWFJ2325833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9026f4b86b6a9763193d4e515d43cd2cc3d0d878ba980bb2194809e9de22da0e. 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/QZWFJ2325835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc0733e3faf84821d74bce213bec9cd7980a341848edef7bda4c4f1c9cd61e7. 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/QZWFJ2325839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f24de1454fd7c41ee2f0c3d501bc4187df475e5c5126ebbaef56fd0390179d9. 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/QZWFJ2325841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d64387e1e6e54a3f0d61bdb5b1dcaee0d1fba6bfb15ed6d4f61094a9312b72. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFJ2325844.