Shawn Thomas (born January 14, 1972), better known by his stage name C-Bo, is an American rapper from Sacramento, California. Known for his extensive legal troubles, he was the first notable rapper to
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 0xb806f02779cfaceb1092ed7ee842bb63812cc437aafb463051e54b372b3a9991. 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/6633b832-34b6-4baa-b325-1c3812195b4d.json and https://artists.proofprofile.net/proofs/artist/6633b832-34b6-4baa-b325-1c3812195b4d.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 0x45379b15982ae9d173d9fa353cac77cc6c8e157a167ab0214d58ac765a9a25f8. 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/USUYG1000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb78b732d8a3d1a8d00a9e33b471dda5c3074ebdf4ef1e803c6a883a028f2b0. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USUYG1000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e1d437120c447ae8710b24effb7672cd286819a568dd194480e13a59ae5436. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USUYG1000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0a7bbd536c6544b3ae9375799831b2629d9b8d8a724d259fef304d75fb4e06. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USUYG1000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581eff0dfed17014781da5a601b5828a704099176f0235209f118437027278a9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USUYG1000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c6af3cf068f23a9c42cbec2b1b93f0fa3c7473c48f93f25325cd21c50ec276. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USUYG1000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cb84fa3ff0b53ad2808f73c69c599db5e5c4066d778481410353fce026668f. 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/USUYG1000034.
The Block Brochure: Welcome To The Soil (Parts 1, 2 & 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63b6caaa598ca77e3fc99ab27e65ca37fbf30f39f5c3875c45faab6bf975b19. 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/US4KV1200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4c45ba3929cdc70e5a916c032ccb914bb65a1dc8cfc4e1557a85477ba03114. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USUYG1050989.
The Block Brochure: Welcome To The Soil 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63b6caaa598ca77e3fc99ab27e65ca37fbf30f39f5c3875c45faab6bf975b19. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/US4KV1200048.
Bay Area Playas 2: Raining Ice in the Bay
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd77847c0f6b4a5ea4672f897cabcf0a85ee3c798c4db660cd9112a1bc16540. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USBAE1306064.