Lucas MacFadden (born October 4, 1972), better known as Cut Chemist, is an American DJ and record producer. He is a former member of Jurassic 5 and Ozomatli. He has collaborated with DJ Shadow on a nu
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 0x32f28d38eefe60217ff24cad6dfd1aba72fd81cc45e1991b5d878841ca6a0184. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/153631c5-c1e5-490c-b37e-28de5bcf81f0.json and https://artists.proofprofile.net/proofs/artist/153631c5-c1e5-490c-b37e-28de5bcf81f0.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 0x46029c80b126a1e418b54c14e7c670c5c2581240dae8de05c387901858a3bab7. 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/USWB10602848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd650133043a4f4cdc6d983f61986e2f109f4e357ad8b07f43d83d2b5be006f86. 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/USWB10602849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0e4ec0e84a015be28c354772b0879a70a4c67041fd9682be53b505d107894f. 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/USWB10602850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601fed76f9d3c044bf366c45c64c2e9815358e413d67f0093f61be607b5970e6. 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/USWB10601143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ff3ce0a58b5428c6a051147e83e8fa5600af5d7285c5acde2ac58b964b3272. 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/USWB10602851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c7bbafabdd417b0eecf5a0eb6ed2f8f2b22f22df86c461e3588f148969eb9c. 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/USWB10602852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1122105684827975040f7c5b4f882bec7c6b9123857e128332f48bb25187e8b. 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/USWB10602853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfbca1058837e9bbe0adce6cbcf1b7a2bbbf3d25906c802bce334e195f61f25. 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/USWB10601103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709decda694a1a0e504a1ac33734cdcdbe793148b8269d6f8b355af553dfdf12. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USWB10602854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91afd7ded36f6cae3cf21aec36c7878fc0d10a8cd4d11536c7f2b231120e8f1a. 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/USWB10602855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d12027497a4d2c6901b5e25eb1b65628b69d4228b4ec00ad0ce713a08e7f08. 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/USWB10602856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3c4881cc58e861eb829fb24bee337e43cd5520a859c2a8f49130482ca38391. 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/USWB10602857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99e402da51c96a66aef9ba67393e99afffb6267e31470ab4321af27920dbe25. 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/USCA20806735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601fed76f9d3c044bf366c45c64c2e9815358e413d67f0093f61be607b5970e6. 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/USWB10601143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eec76820e7b67c1371af70b06b1575497b5341748fc89076235af42c1294f2f. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBAFL1100206.
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 0x81100569af7d307fef85de5df7e090d12efa575b4b95edd07c0ee8fb23f15dd3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZJZC1900384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5daba0fb8fd137fc5b65de7b6f54cc8a7b3a73d3f980dd59604960b356f91a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US2S70730003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5c6c63458b9376e2e99525f244dfdea709c869fb15d9079cd5d46d791b8bf4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US2S70730004.