This index entry documents the existence of a fact ledger and SHA-256 hash manifests generated from the MEGA CSV vault. It is designed to support defensible chain-of-custody, rapid retrieval, and public/internal tiering. Attachments: MEGA_FACT_Ledger_FACT-2026.csv; MEGA_Record_Hash_Manifest_SHA256.csv; MEGA_File_Hash_Manifest_SHA256.csv; MEGA_Timeline_Events.csv.