Koos Kombuis (born André le Roux du Toit, 5 November 1954) is a South African musician, singer, songwriter and writer who became famous as part of a group of anti-establishment maverick Afrikaans musi
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 0xbb2a026feceb2fec7a1a3630e9606af45a8c863c9a4260f02a5b446b9bd4952e. 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/0184fe84-ee99-46cb-90a8-ecc3c22581ef.json and https://artists.proofprofile.net/proofs/artist/0184fe84-ee99-46cb-90a8-ecc3c22581ef.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 0xed008a15a0129f76e1653e29527bfccab663542e94d1af432ac2edd45529b782. 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/ZAA442000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a2e2131827b1988eafcb91b7bccff18c9b01f7b45d54fb9f56ae155de9934f. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/ZAA442000357.
Niemansland and Beyond! Ver Van Die Ou Kalahari
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0435de976cc76ca9de78d1512158648ebb62ffb076fd40f4042418574f6538. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:52:51Z), 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/USCGJ1287338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2e500a102099b14146589a444e8d4171615e0ebaac718970bf237ae70540ea. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USHM21248196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264b7ba7f08cb6a5cfd4199d24bc224906f2b05f204f92e8011929422c2a91e4. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:03:53Z), 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/USHM21248199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0068e8d359a40f440d05921fc7b76c640088b3047c2c3561b84b7222ba822f24. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/ZAF861200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341d68f77f09085b50a51fca80520d6e68efc60fc8d3fc9a7a49d40f4f65517c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ZAF861600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0dc8cf669ee9712b5d6e7d21be80b8208d36a4eea1faaf50277af40c402482. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZAQR42104463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d490a077eb4e816798cf957c4349acd7cbe0e4f5c162b49b01d9be5480ec39. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:49:14Z), 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/ZAQR42104464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470e87aef4c2a2beb89c083274267dd03bc5129cdbe3c05489bab9569db094a3. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/ZAQR42104471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1b9bb2c2724299367109a19049f78839795b6ef7ac3c1580de24f08f97f34d. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/ZAQR42104476.
Johnny Is Nie Dood Nie (feat. Koos Kombuis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92111c4a1c3e91c196e53355e75caff6cc75dd1000821b75c76646f019847557. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZAO861700555.