Warren Anderson Mathis (born March 6, 1977), better known by his stage name Bubba Sparxxx, is an American rapper. His 2001 single, "Ugly" (featuring Timbaland) peaked at number 15 on the Billboard Hot
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 0x0a7dbb49a0c22eb4938fbd3d32248317969ee254452bedc63084796cfe5590df. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbdf813f-91cc-4823-8c91-ff5460eab680.json and https://artists.proofprofile.net/proofs/artist/fbdf813f-91cc-4823-8c91-ff5460eab680.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).