Nicholas Zakaria (5 April 1956 – 11 December 2025), also known as Madzibaba and Senior Lecturer, was a Zimbabwean sungura musician, guitarist and bandleader. He was best known as the founder and leade
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 0x27264acd1ce699b95a56092962898b7b93c8ffa2c71d8a229a76a784dc4cb6ed. 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/6ff990c4-c41e-4641-8b41-f214462282d1.json and https://artists.proofprofile.net/proofs/artist/6ff990c4-c41e-4641-8b41-f214462282d1.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 0x0242b2a504a2f096558bb868137e3ab4f0111b4d576161870e7b25e158973cce. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:07Z), 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/GB96Z1103032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01be26b6669ac68d00c279e1a02867e2eefa93fff3fc161dcbd9452d1904924. 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/GB96Z1103033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2675c67ea2c3fb0a4df5b0842ba77cab4af0e44b23d54e7647d70e0c55bddaf7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:44Z), 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/GB96Z1103036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4e934a53dfecfc98d51745ea2e12705c0c1941e557dfecd66eff41d46d9901. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:22:25Z), 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/GB96Z1103039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ceec89830ddb4739038e0937ddff7afdb24af30737f11d5d7f7438d4a90905. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZAG530900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f28845d0bd174b1ba58648bd6f0ed421443effe1609bdbb4c106ac54b1e5b5. 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/ZAG530900240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b49ef31e32df9d2692c9f12a2ff5ab7833db8fcde29a25b3ea8565ca96f8c0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GB96Z1103431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e8f7fb6388fe9e724cd07ca7eae9c043f9fb8281b415b75c171c04faedac28. 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/GB96Z1103432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00495e2889a6b01b0f56754a72c16c4a3ff7a0d9642b7f49b95fa87377f53b4f. 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/US6R21484404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfc0699b473d11ec84f0d67f935dea50c00991fc50224f566992cb524f0c717. 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/US6R21484405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66e4ba12cb4488f1aef37030a861e284960141ec783d4ff18091258dc4f5fa5. 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/US6R21484406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a7b713cdc8e08b96d773daddb9543c6aacb88c5d58f078224524d472bd0396. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US6R21484407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e9a69873c78e11846a67075b0d7ff5d80db08b4a543a861872100a9e00ae58. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/US6R21484409.