That is great! Now, show us the tx on the blockchain, since such is going to be disclosed anyway come tax time, you might as well show us said proof now to quell further discontent.
Just so you know, BitPay's systems don't give txid's to their clients. You a probably asking for something they don't have.
If you do a bit of research you can find what information is given by BitPay's api here;-
https://bitpay.com/api