Khadja Nin (born 27 June 1959) is a Burundian singer and musician. Nin was born in Burundi, the youngest of a family of eight. Her father was a senior diplomat and Minister of the Interior of the Kin
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 0xcda2619e00f3a3f2640e7f51519115e22ea640dd607c64d80498fc87e5fe74e8. 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/c945a8c5-4001-4490-9cc9-3beeef432ef9.json and https://artists.proofprofile.net/proofs/artist/c945a8c5-4001-4490-9cc9-3beeef432ef9.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 0x680255df8970bd0d5b6fff274b3621cbccb6732166d0a6c6b37395dd22542f4b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/BEF019812400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f872bd60e4b9a30cdbd0840554082d7ef36673b7121382902a0e6b807759e9c. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/BEF019812403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3c936eac09893930fe24654106423a8881396918f4df96023c358b42f702d9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/BEF019812404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6136caa1a75f4e12b4c90399af345ff800314a2ba9be835627af525d9146d386. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BEF019812406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dcd36ed765ecacc9d2b3cb51dfd275847efcbb66764078aad414617a20203b. 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/BEF019812408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b94981eb7639a9977968da359390421766f163398c7a8ea7b67ab17855610d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/BEF019812410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75358522c19b614ac49ef57020667eedbed6cedee753703c150f5c7b8dea5476. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/BEF019400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14016c2c3bda5a4478fae1d1794b0c71a0184ff102ecf0ded280b74c86e17bfe. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BEF019400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f90c02d3ea12369f551ab9ab5ba16de1257833cbbe087b0476317ed7af07d1d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/BEF019400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75358522c19b614ac49ef57020667eedbed6cedee753703c150f5c7b8dea5476. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/BEF019400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0f4946770d75af3e88c40178eddae2c2665768cd486fe4cf019020ad7a1265. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BEF019400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14016c2c3bda5a4478fae1d1794b0c71a0184ff102ecf0ded280b74c86e17bfe. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BEF019400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f90c02d3ea12369f551ab9ab5ba16de1257833cbbe087b0476317ed7af07d1d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BEF019400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247bf20fdd77528664b3aae20a5aad69bc7a57c86d59b3b83322e5518d7bdc87. 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/BEF019400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0116933113381e43bde1a1373998813eef01f63d1be7265463733ea082b167e8. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/BEF019400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ede9e9606739768163c64bbe83663efb3b1d6b3a05c22193cb6385beebc8f92. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FRZ199600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dc27ade482431a2275efe55e5ad3e52e0421f8efbe501648665b6e768b03ad. 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/USAK10110538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3903ab47350103e1e66207159c705afe98c6f80b55b81707c7bec5be4876f57d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USAK10110539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cec7301a6f766bcc25d023e2c5d4670a20494eda5499f9ea7b3d706dfca4fb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USAK10110540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf20862141715f4c3fb1f92f5f2b143d20619bf8c9f0f8b2371260f7f1dbe9c8. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/USAK10110541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f475b49ef7615c847f329fcbfcbbace7f097b2345f955b6cfdc29bde182094. 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/USAK10110544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92831269b662c66ff53cd4b5344e2157ce5c5122c1048ae144704ffb32d00a2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USAK10110545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78f7279b5878bceb454634136bdcc449579a460c1f06dbe9f63f07140bddef6. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/DEE479700265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78f7279b5878bceb454634136bdcc449579a460c1f06dbe9f63f07140bddef6. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEE479700265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6131f6c908a073fe71283c980ded1940619c133ead2fc085adf66ecbcb8b587c. 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/FR10F0100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78f7279b5878bceb454634136bdcc449579a460c1f06dbe9f63f07140bddef6. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEE479700265.