CheckDB error 9003 SQL server 2014
Currently I am restoring SAN snapshots to another server nightly and running weekly checkdbs on that test server.


Read this article by Denny Cherry - A SAN Snapshot is not a backup !.

I would suggest you to take native SQL Server backup (preferably with compression - to reduce disk footprint) and then restore it on a test server and run below command to see if you get the same error or not.

DBCC CHECKDB('YourDatabaseName') WITH NO_INFOMSGS, ALL_ERRORMSGS