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 0x0e990b33949d2ef59ce46527335ec5033af055f85eea929a14c7ebf984acaaca. 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/f853016e-3072-42b1-bf4b-90a4b520fb84.json and https://artists.proofprofile.net/proofs/artist/f853016e-3072-42b1-bf4b-90a4b520fb84.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 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 0xadf7f11add658736febc491973bd98cd380616eda51469b9af82d2ea320f5d75. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2422198.
Imithandazo (feat. Young Stunna, DJ Maphorisa, Sizwe Alakine & Umthakathi Kush)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ab1b5278f944438882bc4581e388852afca8f5537065d3f3eecfa8d634cebc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZB88P2300336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c4304d97be25e164a89257460b01868d32083428a35147b8e6f9c8d2a110ab. 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/ZAA012300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3bbcfa3aa571d34062dbf4b8b08a009719bfbbee6f877139398b679cf6d424. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ZA40S2400941.
Abo Gogo nabo Mkhulu (feat. MduHumble & Knowley-D)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42ffeb59d274a8b476438148f373f6fc0026b088cb807d49ae6764af34a5a28. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ZAA012300289.
Ngenza ngama bomu (feat. Mr JazziQ, Umthakathi Kush & Sizwe Alakine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2748608843e1ae6a35f24607a2800d55cc4379556e67a5cb931ba361b7ec0ee0. 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/ZAA012300076.
uMakhaveli (feat. Pcee, Umthakathi Kush & Don Deeya)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80f01c82a8b7b4f8caa2910768a47fa1675085865e0c765fa57fb442d22441a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAA012300085.
Nolwazi (feat. Sinovuyo & Umthakathi Kush)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64075252992fffe26b8e13a755fba37dacc0d381c2a558815629333fc8336f6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZAA012300094.
Imithandazo (Radio Edit) (feat. Young Stunna, DJ Maphorisa, Sizwe Alakine & Umthakathi Kush)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2700edef570abb52cc2190d6adba6c3caa75c4a1ec27d6ab23a39ecee09b871. 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/ZB88P2300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48a57b44207adbb15d02c5342b56f244399ca73b2b66f5b1cc1827a6a01e88e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USA2P2423823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a2a35e15b77cca2cce25764b37ffc8143833a426e43e7515849b5d2ce76b9c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6P42479890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8152cae4b917a5799f533272b7d41479a99c4dc4151f0805ab00b78faece3ce. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6P42479901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfde7bdf5fc71e6a780c24d23988894ba534e8efcd10c4404043b73f1fde239. 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/QZS7J2478006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c78aaa59fbf3468cb9be0d6a8ce7941588db449da9dbc9227c343bf4926850d. 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/ZAC032410721.
Uku Khanya (feat. Yallunder, Umthakathi Kush)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd197a4dacebc798799400f96c459b3b25461ae8e9f5b41c0a918c417a2f924. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA56E2315272.