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 0x73718b85203bd5e3479d8e274264b3689edced88cb8d3a3b12181bfcf7c4a848. 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/865c5a4a-1d3d-490e-b729-802664289827.json and https://artists.proofprofile.net/proofs/artist/865c5a4a-1d3d-490e-b729-802664289827.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 0xfeea948bf2150c21351705ee1ca09d5cb29de3c37c3d3fc2a3d198d9c8f81a99. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZAC011600863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5311903ee22ca93c7a0d740344a690eee82ec00490ad308ac928730fc70678b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZAA012000118.
Mdantso (feat. Mawhoo, Masterpiece & Mark Khoza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cac45e00d5c41bbf643dea1e3d6d1efa5eda2ce0ed528614585941ef642b9f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZAA012000122.
Duduzane (feat. Kabza De Small, DJ Maphorisa, Mark Khoza & Mpura)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846ea6df0169fde6664ce6065c9429404a9fd881aaeebc05ae6ef730ec0c8e86. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAC012100074.
Pepepepe (feat. Mark Khoza & Gipa Entertainment)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33fd22e59554e36da1e9ca604a88d46fe6ac3db8169aba4a9147748e97f046d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZB1OS2400368.
Sobona (feat. Mark Khoza, Vulela Maweekend, DJ Exit, Ceeka RSA & Freddy K)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c1e4534ae46c901c2a3687ebc3c9d7f701d48ffdb34820443ef7b5fa4f55b4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZB1OS2500532.