Marcel Junior Loutarila (; , better known as Koba LaD (), is a French rapper from Évry, Île-de-France. He grew up in the famous Parc aux lièvres neighborhood in Évry, where is located the Bâtiment 7,
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 0x365d22c5bbc39621f902b3d19f56c48a4f10062660253711e2cb2ee91f6392db. 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/7452024b-cd35-4739-b221-63ad42d602b6.json and https://artists.proofprofile.net/proofs/artist/7452024b-cd35-4739-b221-63ad42d602b6.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 0x919946bb14f49dd6a07af69639f455a473762a139007c65d087b7a3b25b619e5. 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/FR9W11822747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615e8469cb553cf5e4a16a89e094fe0482e51ff12b239a38f81d06855c9e9369. 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/FR9W12351255.
Moonwalking in Calabasas - Koba LaD Remix
Moonwalking in Calabasas (Koba LaD Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99393a7d78e6bc0797f65353d42f388ace199ce50f9f18c9ee62611007f6cb9e. 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/USSM12101084.
No Borders: European Compilation Project
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191c150ba24b099336656bf713ef9947354bd3fc357b983c3b3092b83ccce6c5. 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/GBARL2202310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191c150ba24b099336656bf713ef9947354bd3fc357b983c3b3092b83ccce6c5. 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/GBARL2202310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b5018a5de4a47711efdb69ce716857d26e1b41148d9375864a0c9d3803a7ca. 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/FR96X2388793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da16b16c934ba4bf8fb46dd630f804db473bdcdbc490e1da55d883db644b3b2. 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/FR9W12206430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615e8469cb553cf5e4a16a89e094fe0482e51ff12b239a38f81d06855c9e9369. 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/FR9W12351255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7522362aec26024d747ff6fad95e7859635acece1c13b0ef070b4828ad9f608. 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/FR9W12238501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84078c5eb977ea599e3e3f8ed72b5084b6cfe9f068c1f2af72d4f8418930809. 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/FR9W12339116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84078c5eb977ea599e3e3f8ed72b5084b6cfe9f068c1f2af72d4f8418930809. 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/FR9W12339116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47039f0b5360a7fcce8c16978f5d522ec7437e79f31952bb69e88c6cedbdeb3. 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/FRX852100430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47039f0b5360a7fcce8c16978f5d522ec7437e79f31952bb69e88c6cedbdeb3. 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/FRX852100430.