Juan Manuel Montilla Macarrón (born 1 November 1979), better known as El Langui, is a Spanish rapper, actor and boccia player. He was a member of musical trio La Excepción. Life and career Juan Man
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 0x0a371b99d3d1a9ef74b3b22fdaf81f7636d8bd023e8d097b0bb0bcce56a3a2e0. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d5ca534-d13f-43b1-8b01-1b4c0c7b1bf3.json and https://artists.proofprofile.net/proofs/artist/7d5ca534-d13f-43b1-8b01-1b4c0c7b1bf3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).