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 0x7240900eca506da78a2fb4c2e063bbeb4050d33e95a4cac874a3b2314882d408. 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/107f31d0-6263-4ac4-b450-0310494808a7.json and https://artists.proofprofile.net/proofs/artist/107f31d0-6263-4ac4-b450-0310494808a7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Vuma Nhliziyo (feat. Sburhaiirsh & Zeh McGeba)
Bagejile (feat. Tumelo.za, DJ Raybel & Tyrone Dee)
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 0x44059eb068bae7fc70d3bb9d87b7ce46809a04797e77c54bc98bff01b60d8246. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZB1OS2300245 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755b9c4141067994985834cc153643c151dedda74037fede6b4ea10afad65cfb. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZA8ZK2200041 — a six-check JSON result.
iSaka Lam (feat. Kabelo Sings & DJ Raybel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eb2a1f1ea3c1c389f2b40f3af23abb6ff87957bcda6ad451f99a31d058b64a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAA012400341 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dfafb4ab328dcddcb1b653ea000c080c0d9e2780a4848de052488f66c84061. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZB02I2400003 — a six-check JSON result.
Usizi (feat. DJ Maphorisa, JL SA, Msongi & Kabelo Sings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d51f437678b2f49cbc86040244708da46d50e80431e5a84fbe4d57777d4fdaf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZB02I2400005 — a six-check JSON result.
Izono (feat. Nicole Elocin & Kabelo Sings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c32be5d31c68f7bbbe2e8fccb85b6a2650a8a4f9f83ea2cc7fde6931d695e3d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZA56E2419898 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadccffad9a494d4c87b153c83ffb9dca4c399754b9618aee24b2f57e03b31026. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZB1OS2400448 — a six-check JSON result.
Ncela Silungise (feat. Dj Raybel, Xduppy & Kabelo Sings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8dba4f026cf4ce82eaad173ef4b91f26eb35c42e17934adfdb4c402cff3bc8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZB02I2400013 — a six-check JSON result.