Sibongile Khumalo (24 September 1957 – 28 January 2021) was a South African singer and songwriter. She sang classical, jazz, opera and traditional South African music. She was noted for singing at the
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 0xb349d36361921c87c1b85af176828f14e5ceae78090fc02ec710f26d698faaab. 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/9daf2356-9a63-43c3-8e9c-1fbd22f6d08d.json and https://artists.proofprofile.net/proofs/artist/9daf2356-9a63-43c3-8e9c-1fbd22f6d08d.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 0x844a03abaeb360c18afb91d38dfa5f444d7150e9cc9ca58d5568bfecf762f7f6. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:52Z), 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/ZAC059600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6c698104ada8ca3e68423fe58a13a5529c5e6d9c5fc99a6508c7c7f6536896. 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/ZACO59800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d73570747989b6d717c5702cb870315b8c589f32fee26e39996224b16f35ee. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ZAC059800026.
Township Medley / Thula Ndivile / Meadowlands / Yombela Yombela / Ngi Njenje
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79530d54ffc9d2ab48377a2b9557d9d9a17792c05f6d1d157b3ae0d639d67533. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ZAC059800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c585e27ca789f4af04570103817fa9e8a05e9e2c72d65a2b8fb7cf132dbdd85. 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/ZAC050002364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6187045db630447d9888eb76f4992999970954a6e2159141375e5222c4b92866. 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/ZAC050002343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9e9f901140b60e3159c1ba41dd7a01ed63270e74c9009b5d3a89bf0f7ba0c8. 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/ZAC050002344.
Stage Lights (feat. Sibongile Khumalo & Masauko Chipembere)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffddd4febaffc42c0655ce721a5f69d2da797cecb9bb06f284a67f2e01ce16f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAA010900530.