Nahawa Doumbia (born ca. 1961) is a singer from Mali's Wassoulou region. Biography and career Doumbia, in a career that lasted for over four decades, was an important musician in the development and
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 0x81c26a059831a92bb4c5ddbdf6d005328be63a3abcb42f36fc13c479432f405f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d960905d-a628-4358-be40-e2ebc7ed9418.json and https://artists.proofprofile.net/proofs/artist/d960905d-a628-4358-be40-e2ebc7ed9418.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 0x0ee9bce894175b875b5ab80cb3535f3bc2bc4003347dd9c71bd261443c65c4dd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMUGB1903502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d534edf65d0bd81c35eb3a846e0f8098c6051c94e584a068ceddd1490257c7. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:41:22Z), 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/GBNRN1790797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e77690552da600ec4026ea83314102091ad888a586acc52e3d4c3d12e838e6. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:58:47Z), 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/GBNRN0603301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04332025dd86b98c34e3da8f36aab01538e96452a25f7969dfd99e5e7b22110b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:36:28Z), 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/GBNRN0603303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc235a393578c05990b798764fc9bcdda4dbdcb7b73daa07d23f78bf07bdfe9e5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:35Z), 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/GBNRN0603307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ec166ad817ca5f1ec16bad448a3faeaddb5543b3c5f325d4a4f475aab7fded. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBNRN0603308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ce21831e65852d5ea6ae00bf4920e8f930679a9958478d0673acd527ac2ba2. 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/GBNRN0603309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718c1486ca1a45e2f92e729d3e83d769ab59d16f53e024fac2b5be24713c9355. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBNRN0603310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f88b126346e07580592787ce1e91d320c40b9ce6d00dc078f6f959a0b584f8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBNRN0604102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97079ae83702f48baeefe255486c79566fce42a52e88121f0bee20cca9b82b5d. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/GBNRN0604104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac85ccb93004a9d4e80df36450a584d18e6b9d89bc96d698b97daacb751f619. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBNRN0604105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9de030af382fb74567a7e79d8df779e3c0032b22671a75d8386fa80499b71e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:41:04Z), 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/GBNRN0604107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa76fa1aac4bd1a7949bc715d1c14665784cdab1f38f61618427fc9b51ed8dd3. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/GBNRN0604108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1ed71d8667d1414546c612024afcad20991f7b22a6f07f14f516f1dc89d098. 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/FR6V80303833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc486b0684fb3e0063fec268956d7cba0f9c9e48d5300f47d6a4d391664ad232c. 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/FR6V80303834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27b9cbcadef9dfadc2b7aa9a6bec5802afd748c7a76217f2abe8a2e11228e3c. 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/FR6V80303835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7578de5defd5002a70563f6f45841f215d0c210eeef46ced10e78eb7c4c5962a. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/FR6V80303836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c3b8f1852cc3abe53381e1b567a2307578742465b5b49cf372533a0e3e16d9. 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/FR6V80303837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5c49f7621d7357d78ade3647bfe0651ce3d13e4469627fa9c0c76ed7d3f9fa. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:36Z), 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/FR6V80303838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16b333d4828fb8d37b6e18da6e76db18472d9aa384cc86c266f9cb5769d4141. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR6V80303839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1bb43fbbf5eb5c6840bdd2c54ecba942351ca78dbdc4918d264e807ad8527e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:31Z), 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/FR6V80303840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd749a13defccf6d1bd84fb5833a8133d354917aa7e749cb129fd901a92660f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR6V82384602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba21286c13f8550ee917a461454f5b023002493a3f3411fbf9cb364206a10f4e. 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/FR6V82384603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2c2d8c2fbba4512d29484b6ed051b1549b9bced42d8124adfe1cf45d017f26. 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/FR6V82384605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51258ff8a0cc32635b9d088d06a59a12385d19e3fcc87770c1bb2531904234f8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR6V82384607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b8998d03a5fe32df241b6201129cbfb3c1fc618a1eac08a1ab7ea0c80c578e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR6V82384608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48b56f10a9c0e56d0e3fdd3a088eca9e010e9c20a3999d5fac1cb7a82bf10c3. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FR6V82384610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d037558e95b9eb8e401452ed073a63eeacae712f999e9ff07fec6c4b8a44b4. 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/FR6V82384611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de211cdd9e67070bcd9164de4d539fcaddd10b5c5dee76e2cb4e619db8c1ef9. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:45:18Z), 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/QMUGB1189703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bf1a6a5c169af99d7016b52d6d60b7e7bdc63eb826c78dc5adc9cb2a388420. 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/QMUGB1189704.
Nahawa Doumbia (Ben Gomori / Tom Jay Edits)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18b419bfd217af78133861bdac9c21babfa3ec71ddbc743d059afbf06eb2d10. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QMUGB2203902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71300f1e7d514259b77c2c84989043c67075d98660c888f68f4c834a7e0bafa. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:30:19Z), 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/QMUGB2203903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3960c36aad5a23f1aa7059084e7e91530e3c08d360ee93a4e1787e0a9183508b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:11:40Z), 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/QMUGB2203904.