Avoiding backing up corrupted backups

I’m trying to determine the best plan for my backup tasks. A concern I came up with in determining my backup plan is: How may a plan be built to backup without corrupted backups, even if differentials become corrupted? How’s this avoided? Am I right that the most prominent way to detect a corrupted backup is to humanly review backups, not automated by a backup program?

I’ve been using a non-Comodo Backup flavor of backup–Cobian–with one month of backup plan experience (Cobian discontinued its forum, six years ago I found out today).

Yes you would need to test your backup by performing a restore from backup to see if it restores correctly.