Orders placed through your Instaproofs storefront are processed through your own Stripe credit card processing account. After the transaction has been processed by Stripe, the funds are then sent to your bank account according to their payouts schedule.
For most photographers based in the USA, the funds for you first transaction will be sent to your bank account roughly 7-10 days after you've received your first storefront order. Subsequent payments are sent much more quickly and you can expect to receive them just 1-2 days after each order is placed through your Instaproofs storefront.