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 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 0xad2504ad3d484483e77603fa3c6a7372744159f3657feefe69f0bc9ad61d04fb. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbeb824e-91f0-4f3f-895b-cc21deb58311.json and https://artists.proofprofile.net/proofs/artist/bbeb824e-91f0-4f3f-895b-cc21deb58311.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).