Umanji (c. 1968 – 26 February 2008), born Maruti Johannes Nkuna, was a South African musician and singer-songwriter. Biography Umanji was born in the Zebediela region of Limpopo, South Africa. After
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 0xb6d10d6498eb7fcb74652a840ab4ce03a3ad65446b122b8513ae88022d094c91. 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/3138c670-e4ea-4723-92c4-3de2cdf5626e.json and https://artists.proofprofile.net/proofs/artist/3138c670-e4ea-4723-92c4-3de2cdf5626e.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 0x7b2ee9ed3ba1ca8a45be5aae069023f0abf8357ac300d74086aa5dc6fb3c2a24. 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/ZAA019900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ae72ca3279544792fe6499f79e56c4f6829c5fa64cbe2afe4ebe776b350034. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZAA019900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940f2cf10e21cc43dc05c3e644468919a2badc19e0e8c6dc51786322f029cbb7. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/ZAA019900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca02fec674e4bbbedc69ffb4b82e734653825aff95ac8f147d29aeb4010898c5. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/ZAA019900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b26e41c4c903ed858336a07a4b3ab6a72ae6b08bd2f8983eb94b1d8f9e32cc. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ZAA010100332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b7b55db02b119ad49c58d7f3a5255b52d7840cbdd2d15576c701de0f7eae41. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ZAA010300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22832135382ea866070f556f5542bb94fd89d99aed835164db33a895dc797436. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ZAA010300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418b67fd4e3457b46e733b3480a0e84ceea39a0a9af8405b37ee48b83449771a. 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/ZAA010300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1e4a113d6dd38204b60eb6eebe861fd2a48949343cfe238013f87960f169e9. 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/ZAA010300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea30dee3fe5fe9a134228bc5bbf668032c78ec80b211097ee9601bfa88fa8d24. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ZAA010400447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3301c560a91bbf4031f236280516e4d7e8cda3fd8a0574e9b8e375b4e9940fa9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZAA010100324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22832135382ea866070f556f5542bb94fd89d99aed835164db33a895dc797436. 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/ZAA010300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442cbc7dc71e627d7f4037c6e86a3bec1f2b53cbc6c9f454f92f7d10bb9c6f3b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZAA010300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5401e5a5bb8fe127ad6a870bbfcb92b71fa43ad62b0ee9c32bd0673bef6d223e. 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/ZAA010400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b26e41c4c903ed858336a07a4b3ab6a72ae6b08bd2f8983eb94b1d8f9e32cc. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ZAA010100332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e7922af5111351e1b68ce1aaade82aeffefd7e2290ee2d978391157e403e8a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZAA019900167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a45634125a7a7cf2a6efa4d5e8af0cdb7a6440544395a35f0685155b9e6c8. 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/ZAA019900169.
Mzansi Greatest All-Time Megahits, Vol. 1