Yannick "Thurz" Koffi is a solo artist from Inglewood, Los Angeles and one of the former hip hop duo U-N-I. He is a descendant of both the Ivory Coast and Belize, taking his moniker from his last name
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 0xb0e388cf9e6de4e5ece64c900a20628b6854c524325463aad096c5db0958ce0f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5649644-0646-4b6d-93aa-3570048329ae.json and https://artists.proofprofile.net/proofs/artist/c5649644-0646-4b6d-93aa-3570048329ae.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 0xaf8902438793cda50a7918ed8407c845e0e15e2a2cc5b584d5cadfeeee5f6f54. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAAZ1173325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87367e523a6912971f9683cd3120a45069d99c675d8d7c3a036e1766f60402bc. 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/TCAAZ1173327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e498f47a174c04749bcf011823fd3cd1a73f91da92f70c4ce110ee5794671e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNB82310594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004563de70110cc97a00b3fae9a152f46f827bf8014b369f340ca2e7cc39543a. 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/USUM72123990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c40700a8b77da91099f76967030554d0a4b1bbbe44c7e6f32637755c18d83a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL2170424.
LA is the Center of the World (feat. DJ Rhettmatic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ebf258bf53e3f9aa7fcf73c25e2ab9b35fc49af4fbfb6909204fdab1a792cf. 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/GBKPL2036531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e137b816903008d501a5b405c66cfac05ed5ea6e1a2059c34f94277f4f43ba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL2032196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c24d82448ae3f64f1a0856be8a31b5c77a8442a03da1b9189de7b77e8786952. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKPL2020467.
Charlie Chaplin (feat. Phil Ade, GLC & Thurz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505bfd0db25324c8eddbe54324888e03b7c3f1351d848dc7bb3e562bd051c48f. 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/USLD91722866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee833c29e712cf495c9d84a4bf45346f903be95be244ff188926a314ce1de2b. 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/GBKPL1977576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69298694f2d28ee459041486347e4f215c65aa67d3f4eec514aebcbc972990a. 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/CA5KR2374993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac226e065a43e582a47026171355112a3a8726b17131ac8fb2ca6934a7aae19. 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/CA5KR2374997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d764809585d15cf36d5ca816275ed6cf12547c696ca15f9dd1cbe6365540363. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHKR0924207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9292b0dc862d3b9823da5d9ae589e288acfacd1f5c9cad8ce4cdbaf879316a90. 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/USHKR0918003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8e7348f333113f87b39e4a2b4836551fc869b058ec39dfb4e6b8ec77cfe8ca. 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/GBKPL2090357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf169dcc67f1263f55fe905335a94c2a85312247129ff4c10d203fe37600869. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHKR0965101.
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