During the development of an Real-time Database Management System (RTDBMS) one needs to trade-off between data consistency and timeliness. To achieve a systematic method for such trade-off, we must find a way to model the behaviors and properties of real-time transactions. In this report, we experiment with the modeling of transactions and verification of transaction properties in UPPAAL. We build a model for an exemplary transaction with the optimistic concurrency control mechanisms, and model-check the timeliness property.