Christopher Lee Rios (November 10, 1971 – February 7, 2000), better known by his stage name Big Pun (short for Big Punisher), was an American rapper. Emerging from the underground hip-hop scene in the
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 0xd9d96da80b70cccb0a66b05c43370db09296999f4a2ff90a1824e96daed0a6aa. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1047d927-a429-47a7-83c2-dd6b8fce3d32.json and https://artists.proofprofile.net/proofs/artist/1047d927-a429-47a7-83c2-dd6b8fce3d32.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).