Verify Query Request Received
Create a SQL Trace (server-side) and capture the SQL:StmtCompleted event.  You can filter on the TextData column to ensure you're only getting the query that you are looking to ensure is happening.

The easiest way to create a server-side trace would be to create it in SQL Server Profiler (which is innately a client-side trace), do a quick start and stop and script out the trace definition and run it in SSMS.  Please see this TechNet reference on Server-Side Tracing and Collection for an exhaustive reference on the details how to do this.