Leah Kate Kalmenson (born September 9, 1992) is an American singer. Kate released her debut extended play, Impulse, in June 2019 followed up by What Just Happened? in 2021. In 2022, she released the s
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 0xbee033579a904377abe258091b2611bfae38a21cd68354255d2399e5ebc24c76. 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/0754aa0e-0acd-41da-a88d-a41f39604763.json and https://artists.proofprofile.net/proofs/artist/0754aa0e-0acd-41da-a88d-a41f39604763.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 0x27cc3c7596e4b12b22570b151e62c83a856b84181f56fd63ee95159607d4ae37. 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/QZQAY2334109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253ca37729f01145daa3af80f65a315be6aa189eaf25f844b886f85522ec4b8c. 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/QZS7J2368759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a0a89fd6a351588831de9a2eb698102fb52994e5ca42bfb22aaf06ce2b3c82. 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/QZJ842002517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd449854187168820f55f85db012876864000987f4840ba6bc933385a4091e505. 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/QZJ842002518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98645331e30f446da67f3469f4212da81c932ab849c3a539f3142b5bb1997e15. 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/QZJ842002519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa725ac3635ed961506fcd42919135b565d62031d075b2bd39d92821d54d74f92. 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/QZMEN2163580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b97a449ec92e6f702a111a1db99bd4fa559b37327aa6cc08a2ce21a53d856af. 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/QZMEN2163581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a3317bf4d4eb6a896e531edf067caf5399c77345a1d8316870dcc34bf77aa9. 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/QZMEN2163582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dee1355fcf4f508e58a1460476ad186d6bce5b90b16db8a990cfe3b82252c27. 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/QZMEN2163583.
Unbreakup / Brainwash - A Super Over Double Feature
Get In Loser/Bored - A Super Over Double Feature
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253ca37729f01145daa3af80f65a315be6aa189eaf25f844b886f85522ec4b8c. 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/QZS7J2368759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa1be9d0db222edbe4d996d391a4761e3bc39891798f91601ade644d050b279. 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/USUM72303546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e92e2b4f2608662b5c6f17fb94567dff7683a3e65d90ced019c6a2903805e4c. 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/QZJ842002731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd921cea0ea09e0ae71e932ca765c962fb1c879a68302c4204e80074501345b79. 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/QZJ842003163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd416ab2ff511d3efbfdb507e217e9fdaa21ecccd5c7e3dcf33b063b0717958d. 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/QZHN42142205.
Fuck Up The Friendship (The Knocks Remix)
Fuck Up The Friendship (Little Monarch's LO-FI Remix)
Fuck Up The Friendship (Gabe Ceribelli's BPM Breaker Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d372206d522adb209d34f200470cc0e77c600e3fa733ef50a440341db44970f. 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/QZFZ72172553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a2b4fbde4fcfd21e9abea8446dfd3c02037a8725dae1458737adb243153e4b. 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/USLD91729376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfd9d943d919fa185dbdd1f7899bd535bdfbb5285addc61e1f2aefd66efb1d9. 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/USLD91727595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276a386104c167e36be04676b5651c0a4a527eafb322cb62b30e36bdff405f03. 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/QZFZ31942984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda487773f718021088ba1a8fa61e01ab382127c92f0f1073876d05d8d57b2894. 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/QZFYY1980467.
Super Over (It's Really Really Really Over Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cc3c7596e4b12b22570b151e62c83a856b84181f56fd63ee95159607d4ae37. 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/QZQAY2334109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253ca37729f01145daa3af80f65a315be6aa189eaf25f844b886f85522ec4b8c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZS7J2368759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16e6beabae40f7c0f1a905bada93b7060c0ebf76dfb1005797707568e0e00fd. 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/QZQAY2496043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6090a2e385901977c5cb88dbc06ab5584bd7bdc045b5445f26e3c4475f51e31. 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/QZQAY2419782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c219b9770d2d0fd349e2a727fa91751fa06182c3613f6feb7a2df922ed81165. 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/QZQAY2440405.