how to validate rman backup and archive log.

Dear experts,

one of my client take the rman backup on tape. backup is properly going on as per schedule.

but now i want to test that at the time of recovery the rman backup will be work also i have to report my client about the validation of backup and ensure the client backup will be work at the time of recovery.

plz suggest how can i test the backup directly on prod instance?

plz suggest the right command to test the rman backup on prod instance?

i have study some command.

restore database validate;

RESTORE ARCHIVELOG VALIDATE;

RESTORE CONTROLFILE VALIDATE;