Same answer as the other anon asking the same question:
You don't need to "prove" your religious beliefs. Just state them.
"Congress shall make no law respecting an establishment of religion, nor prohibit the free exercise thereof;" -- 1st Amendment, US Constitution
This applies to the states, as well, via the 14th Amendment, and probably via your state's constitution.
The government cannot determine what is or is not a religious belief. What makes a private party (business) think they have any legal authority to do it?
Same answer as the other anon asking the same question:
You don't need to "prove" your religious beliefs. Just state them.
"Congress shall make no law respecting an establishment of religion, nor prohibit the free exercise thereof;" -- 1st Amendment, US Constitution
This applies to the states, as well, via the 14th Amendment, and probably via your state's constitution.
The government cannot determine what is or is not a religious belief. What makes a private party (business) think they have any legal authority to do it?
Stand your ground, and DEFEND YOUR RIGHTS.
DO NOT ASK PERMISSION.