"LMK" (initialism for "Let Me Know") is a song by American singer and songwriter Kelela. It was released on August 1, 2017 through Warp Records as the lead single from her debut studio album, Take Me
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 0x283f48302edbb239fe76556ea00a1369aacf56718930452640d6611c45881eb8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d79d1dc-a3ac-4f6d-8ecf-ac1eda35dbef.json and https://artists.proofprofile.net/proofs/artist/2d79d1dc-a3ac-4f6d-8ecf-ac1eda35dbef.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 0x604e73f87b571b0fa37de93ea82c9037388d2a9ed2d4c443f3cac684d758ec42. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:18Z), 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/FR7HC2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4d84709c882aacb4a24850a60f5169e6dc152b3c4fbe2d6dc0b3fbf3253a11. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/FR7HC2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb631c8ce2b0d2df59588d877efeffe03ab190de171fc056715adb8f69c2a16. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/FR7HC2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b3554b031144350c80efd0e9fc5e44f21193766c264afb06f99b48b1d64d09. 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/TCAFI2166254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4022e2e8d459e784633b4afb2d0fd7ee1b7d7c9c4acf1f8bcf91ac9432612f43. 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/FR2EI1502350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2f6f361db526dfc3834a07c4e72d216e75fc3ec91139f76cdae6127e7a6704. 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/FR2R02200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04e1ad294c16e5d17cc61bc2249eacb30d71d43be10bf7015d71cda43538f50. 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/FRPHC1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9385faa2e1e580c1133b626544d49676ed8dcb24d372f809c513bcec9dd2c3c5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W11809356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf5692a9dbf9940abbd4d4743a35e663425ccd014244cde9ebea4b15e737e46. 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/FR9W11815488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf5692a9dbf9940abbd4d4743a35e663425ccd014244cde9ebea4b15e737e46. 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/FR9W11815488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2f6f361db526dfc3834a07c4e72d216e75fc3ec91139f76cdae6127e7a6704. 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/FR2R02200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f25997d21d3b8696c7a3cfec6cdb4e250b4ad6ae23271810bbc6cdde370552. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR7Z21400060.
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 0xf81751b6a0ddf540dc8881af1e8db6f2daa7c57000414880c6e45f695a83eb95. 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/GBLV61623805.