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 0xf0eafb73f164f6fe719016170e1de8b6ac15247102056868923f4d1392f34948. 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/fc300a46-6740-415e-a701-bd81b90a2446.json and https://artists.proofprofile.net/proofs/artist/fc300a46-6740-415e-a701-bd81b90a2446.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Khanda Liyazula (feat. Nicole, Mthoh & Welkeys)
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 0xb8150c1955a553878dce38eecef334b773c4d8287336d363fdaf9df6b773f116. 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/ZB8CG2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e0167b9f37e72a87a8d16a478b1c1b76254580d740f86c6772510fac4c326f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZB8CG2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8150c1955a553878dce38eecef334b773c4d8287336d363fdaf9df6b773f116. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZB8CG2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5dc64fa1bc47abaa0ca0aecd1eda2e91b264105155f64deb05664e3cbbc4fe. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZB8CG2300021.
Ngenziwa ngabantu (feat. Lington, Msongi, KAYMOR & Tycoon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cf16ed1ed0ac28298fb346bac02f2a56010ceaee5990e2995ef8233fbd6e46. 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/ZB8CG2300022.
Darli (feat. KAYMOR, Aymor SA, Magistics SA & Msongi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb580c5c73c54c760f5d1f081dc2d009b612668e07bc8228eeb1185e4fa825a60. 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/ZB8CG2300023.
Uthando (feat. Snesouls, Pellow & Casswell P)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430f7725902a1ebf3d6c21c79bb4d07ac960ddc03b42ba0a35151c2944d38152. 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/ZB8CG2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc797aa4901b4742ffae350f7c2b09e5b8274f10404eacb2b7c9f0196f9cfea. 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/ZAT671200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc11bdeede1c3e5161b2b6e1bc568dd130e22732374b02f3b0a745a00d743d5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ZAC012401594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b4882d5ae5156d64fc31e93e51e353829cf36c57eb47e5637991de5196162b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ZAC012501119.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZB02I2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc797aa4901b4742ffae350f7c2b09e5b8274f10404eacb2b7c9f0196f9cfea. 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/ZAT671200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a6791d84293a8828d491bcb4d371c0d7045957423a0734b905ac520d15d094. 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/ZBZA12300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702cdcde12bcdb06bf4e77be324cb1db1ead924887a3ed08f90875ac98d30547. 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/ZA56E2416469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12456cefa01f86f214890f900d5ac6b363c1c7b87f98d8f504ed816581e0a758. 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/ZAC012401717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3690cab949d97355bff3ecbb4c1a2260bc2d06ae0a84dd040a7211961e4bf9. 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/ZAC012401223.