John Chibadura (1957–1999) was a Zimbabwean guitarist, singer, and songwriter. He was a member of pioneering sungura group The Sungura Boys, and found great success in Zimbabwe and Mozambique with his
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 0x4e43860d75fb6671f26ba21194af860c06fe52dc22df79f384f380435dd31f72. 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/cfbe43e5-6c55-4f04-b101-0436c555f288.json and https://artists.proofprofile.net/proofs/artist/cfbe43e5-6c55-4f04-b101-0436c555f288.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 0x518cea1790c83bd6bb8d497ba5ccb9a26ed3439dfb0d947ccac13a2a948b2bf6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GB96Z1100997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd715d2f6c28f414370efe3e3da131b518488d1d00594f0ed0ae8564dc3816a4. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/GB96Z1100998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9c282c5b0d72420b5ed9c79143d8f15052d0096fd59de3c5b32d45c094832a. 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/GB96Z1100999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926fa9f1fd4bf2571b659df12addd6c03409ca46f2dbd19cea00c4b39eefc1c5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GB96Z1101002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc470399c2eb633cddf42e6376f76b212d59d908326379256dc3b7601335f56cc. 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/GB96Z1101004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114cb3b290c9f279f2fbd945ec8381e104324a926098bc5a88ad1536bb55fbe2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:30:37Z), 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/GB96Z1101006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bf07b80990eb91bce98ac62c8f5bd74dce3254b07df46918dbfd071dcccc51. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:47:24Z), 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/GB96Z1100965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946764783786a79d7f8e88f2c6d6b090dc6b89d4a31de93757ad4cc5077dd190. 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/GB96Z1101128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedcc29a45e5856f57f9994c532426910567f08c6085616d2656f607ab1c9681. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GB96Z1101129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07144bd40b751c5803865aff1661f30c89c8ef6e51c370b15d04ea0d4760036. 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/GB96Z1101132.
John Chibadura & The Dembo Brothers, Vol. 5
Sara Ugarike, Vol. 2 (John Chibadura and the Sungura Boys)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daa33dab014a6eab45bb1e6d6f68968e090b9895f2c8d9c9394b587bf155e86. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GB96Z1100938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61739bec6c48b31d7a537948e4b9c1c1ed7df42b17b6d78159b5abfd6ee9e05a. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/GB96Z1100939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba225d8e89f87c3279a6991d2ceb580b5bf372f63b1014a32e9cf2ba47220ab5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GB96Z1100943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7da638e6be0cf64587575b0ba11b771e76fe592e12091d96e0b552c3002ea9. 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/GB96Z1100944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0587ae3524569eadc8c3ddde4a304abceb06b1c66e1a4c61c4aaf49e00085631. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GB96Z1100945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd716d7dc312229b78983608fd827bae76169a12cf5a4be15a7f6d66ee7a43601. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GB96Z1103268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64c5cb136e23841cded96c90de68d6c54185ad60dcf96bbbbb93fba1651b9b7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GB96Z1103271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64ec909373850a8333a54189aa7ccbf586e4a3a4864ece222857b667b76a097. 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/GB96Z1103273.