The U.S. OPRA Options Contracts Security Master dataset provides a comprehensive reference record of all listed and delisted U.S. options contracts disseminated via OPRA, covering options on equities, ETFs, ETNs, indexes, and currencies from 2007 to the present. The dataset includes core contract specification fields such as option root symbol, underlying symbol, full contract ticker, option type (call/put), strike price, expiration date, and trading dates, enabling precise identification and historical tracking of individual option contracts across their full lifecycle. In addition, the dataset captures settlement and deliverable information for non-standard (adjusted) options, including deliverable components, cash settlement amounts, and settlement methods. Settlement detail coverage is available beginning in 2018, supporting accurate interpretation of contracts affected by corporate actions such as splits, mergers, spin-offs, or special dividends. This security master is designed to support options data normalization, contract resolution, lifecycle analysis, and downstream pricing and analytics workflows where authoritative contract metadata is required.