Is there another way to validate an rman backup without using restore...validate command?

I have a 2Tb database backup that i would like to validate. But this is for a mission critical 24x7 public safety production system that cannot be impacted so we have to be very cautious. I'm leary of using the rman command restore... validate because if it does initiate a restore we are in big trouble. Moving the backup to another location is not very feasible due to the size of the backup.

Does anyone know of another way to validate the backup to ensure that it is viable and can be used to restore if needed?

This is a 10.2 database on windows, single instance. A full is done once a month and cumulative incremental done once a week.