Charles Arthur Locko Samba (born 8 May 1992), known professionally as Locko, is a Cameroonian singer, songwriter, and producer. He rose to prominence in 2015 with the hit single "Margo" and has since
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 0x59b2f624fb53f01eb01ba368855e36a20fa385be5bcefdf2fe234295ef162083. 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/76726127-2602-42e0-bcbb-a38c3b85cd7e.json and https://artists.proofprofile.net/proofs/artist/76726127-2602-42e0-bcbb-a38c3b85cd7e.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 0x49e609144e7a0f31f1cb971b9f9214bafcfdc0438ee1c9765c9a8a0c43468224. 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/ZA56E1701835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfea836a948c88055143f5b072b0352702283238e4539a38bac7ed43deafa78e. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:51:55Z), 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/CIUM71800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baeea7acaa61c8974da49b720c82ac9c5c002375560064434315a977074c32e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CIUM71800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa831ec5a6c56e2009d44c7dabbcc262e5d0d49f6654d74f9349b0aabd674e300. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:04:37Z), 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/CIUM71800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701c7dc001b37a8f0a7889391d44026fb59de90beeea4c9c7dee0795418c027d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CIUM71800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d8afd022101a43cc660ab042f6f38c235d993cbac039149110909a353ad974. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CIUM71900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86acd52403cf2615b23b35f5be06182ef81c916be8576ba2222467554c1b6a2d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CIUM72000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aaa50a1281abba07df97a0ef36a1b33ab44398d42b625c21d7cbb52fc357a5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CIUM72000274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dae3a4645d18d8c8a8ccc957436b36d2e6b1afad2cabacc4267521a4c07959. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CIUM72000281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a198a357b10051edc0b367c77f0e8bacd86c92c8e634ae112ac01cce773887f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CIUM72000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb61c8d93410472b1c42402064dbad93cb10d7410ece3702a88bd8a12a0f48dc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CIUM72000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777e49b0d56389e84beafd51852e3c0c2d925d8588211963312a0b1982f4fbe5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CIUM72100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf8fe035fe09288f3a0984b329104e8f316e995660935d3c428d2bcbb0e2ffd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CIUM72100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777e49b0d56389e84beafd51852e3c0c2d925d8588211963312a0b1982f4fbe5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:47Z), 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/CIUM72100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a3fd25980d5e586f79a660e908f5bd5561b00e7331226a38ce64a0c0da2805. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTPX2234270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3aa076fa9b65d384e9b3f2605fddc070cc86c8dc5b5e86c1bdfef9181347cc. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FRZ082400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28111eeb39265e7742175dada82bbe439b306048874cc6ff9e73f562c5934710. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:08:43Z), 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/FRZ082300730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c98925841c9990ca1f22089d583809c5f5a8d7d6e19dac74fd0e5bc8b7d844. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRZ082500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b673c9a11e2144a8d9c45c95a5185ee28102d22c51d0fb8b1a09d6583e4f2f. 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/DEUM72205714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10064effba5aa4901b718a136c0a63262683480db0250da81e9262bc8fef1765. 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/FR6Q11700033.