1. A method comprising: receiving a status message from a client system; determining, from the status message, presentation time information indicating one or more times at which a presentation of dynamic content occurs at the client system; accessing, by at least one processor, the presentation time information, wherein an auditable event occurs at a particular time within the dynamic content; receiving an audit message; determining, based on a time at which the audit message is received, event time information indicating the particular time at which the auditable event occurs within the dynamic content; accessing, by the at least one processor, the event time information; and determining, by the at least one processor and based on the presentation time information and the event time information, whether the dynamic content was being presented at the client system at the particular time at which the auditable event occurs within the dynamic content, wherein the dynamic content is determined to be presented at the client system when the presentation time indicates that the dynamic content was presented for a duration greater than a predetermined time period associated with the particular time indicated by the event time information.