Laila El Khalifi (; born 6 September 1971) better known by her stage name Leila K, is a Swedish Eurodance singer and rapper of Moroccan descent. Early life El Khalifi's parents decided to send her to
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 0x046927cc9b3a122f16ce24083b3bfa13438364d1c407e9e8a8e0e06ee52f413c. 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/81a12b1a-359c-4f35-9ff2-41ae1361e1a0.json and https://artists.proofprofile.net/proofs/artist/81a12b1a-359c-4f35-9ff2-41ae1361e1a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Check the Dan / Ca Plane Pour Moi (Plutone Remixes)
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 0x9d6feaa4065e6542c10851e1f4efb9cf57ea13292a06736f00eac62eb180e8f4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/SEVJH0703701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab90876aae665448a6bf0e2e3f67ef3b2134640d808c81b545b2255fb8d2a2e6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SEVJH0703706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d795357be507c4727538b4087bdc29345f82bdf1940af0bec416e7115e005c6. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DKAWM9602503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7542c7fc7a08f087db92731eb1a35d92b2aca69c76ce790505c94fb10dca19. 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/DKAWM9602507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4023ce3a90a360fd47d14b72e7c2b2a412eb92c82d31f3ae4ec54ef42ccfe8ea. 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/SEVJH0703702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b355ef25cadade005c11a39e8d35878bc69bc17948660c67f11b40f9df1b174. 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/SEPQA1500608.
Open Sesame (Abracadabra) - D-Block & S-te-Fan Remix
Open Sesame (Abracadabra) [D-Block & S-te-Fan Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a859916d6dbe5c7f91fbc53bc789e02e86335f864fa5f6203998bc1f4730d83. 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/NLQ8D2400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548e9467458922c1beea5bf87224a00b6ce643f746bb30f1a4f9bfa9be6bd4e1. 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/SEPQA0005100.
Got to Get (Nordik Beats Version) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07028a28985f624443e11f8ea4af5a43470dd339c1883f09ec4e8d3eb87bd375. 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/SEPQA1400523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b355ef25cadade005c11a39e8d35878bc69bc17948660c67f11b40f9df1b174. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/SEPQA1500608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b355ef25cadade005c11a39e8d35878bc69bc17948660c67f11b40f9df1b174. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/SEPQA1500608.
Rok the Nation (feat. Leila K) - Swemix Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7385c6872369c3fd15fc7b51c9d1ae3c90fef5a4000ded7a4c08b3654090cd. 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/SEPQA1300422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8349f5bda7076af0122f32df581017e8b81570e6ef21830313deac0cc14f5b37. 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/NLQ8D2401081.
Open Sesame (Abracadabra) [D-Block & S-te-Fan Remix] - Mix Cut
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50613373bc040f985da51cb3cd4658a5e98a847d42e21f6aaba7c12259c7c47d. 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/NLQ8D2401082.