Katharina Löwel (born 22 January 1982), better known under her stage name Kitty Kat or Kitten Ket, is a German rapper and singer. She became famous as an Aggro Berlin member, where she was signed from
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 0xc3a8e33469404fa656109c917938044f6c77c662afc7d83a46f45309d9709479. 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/c8faaaa5-8c3a-43bb-81bc-1c2fc42695a0.json and https://artists.proofprofile.net/proofs/artist/c8faaaa5-8c3a-43bb-81bc-1c2fc42695a0.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 0xccec2f99923110b0b240ef48d21b3aa71c382c3a3a50fe8b233f7f3f0864672d. 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/CH7812343909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81722484e229c25f22e34994b8ee4becba1eb67536bec787f8655e6bc93cd260. 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/DECG30900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cf62ea38f0b38360b1a7f42e39c9f844de43aed6116d43bd5a1583061d010f. 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/DEUM70905102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e50f7470f139345735daa6c4bb0305d10ff9a301e1b23844a3e8f1ec3af593. 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/DEBL61300920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dffe90112956712f6aa6d4f820d63ed6c99a2b9d9fa76c45946e7355c9f3c75. 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/CH7812066194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f97d291a1737e068c91e5db75dd631be4e6ddc7efb574996b7955d1806317e0. 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/CH7812061308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe185109f5f077778b9d7a57038b5d0802bd5bb381f5419e535690fac4fc681d5. 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/CH7812057467.
...And The Beat Goes On! (20 Years Of Hardcore Expanded Edition / Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd434e8da2a6e03328082d6cfd61f19a6b9717d96155e6ddd2a2d5c5c2d9dd91e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEN061300440.
Jumping All over the World - Whatever You Want
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ac70cd71b0a945cb8f10230af6e293affd346457e6400293ac5f7080c33459. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DEN060801016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad62da12312ace8ed2e850821ca982865bc6ed9ede30f05aff9c94994c6a75b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CZB651200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a986b776e4d1825d357c9f4ba5c1d60ca7d49c0851aa378cc8246c373f9cee. 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/DEZC62495521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c2858d3af4eb83a2dcb9d0a6c0cf7e82812668310465b2fdd7d7c826ef25c0. 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/DEQ121010484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa4a112297dcd658cc85f4be493073e6f3b7bd05bf5a3186c0bc2baa5adbe17. 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/DEZ470800824.
Aggrokalypse (feat. B-Tight, Fler & Kitty Kat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096256d306c6f9a95d0e469d6d92acb330333b138df56c03d78efe97b78aec33. 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/DEZ470800819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdc2e363c3a7a6dcaa3bf7115eebd144f5781fdde90da9975386633cc2f9a0f. 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/DEZ470800844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5973cb54c88d2339b21a08ef7d896f4f26d3bdc26c7b61fc67f9e3c4ac8f8ab. 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/DEZ470800845.
Halt dein Maul (feat. Kitty Kat & Willi Murda & Automatikk) (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd201495577200c1ef1a84c2521eb1a91c73e854086e1624dd9af195f147e71e9. 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/DEZ470800849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82a8442c40412fdba36e0b2214d72f509dae172613d7e8bdcd0385a0af494d1. 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/DEZ470600468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f458962a4cf61889ba2628316a0e5cf556bd0989d6a8fcf19fbf857edc64f1. 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/DEZ470600477.