Restore/locate original MAC address

Hi...I’m worried I screwed up pretty badly. I’ve been utilizing an application called MacDaddyX to spoof my MacBook Air’s MAC address. I didn’t think to write down the original (i.e. the one on the hardware), and I don’t know whether the one shown under the Advanced tab in Network Settings is truly the original or the changed address, & I’m unsure whether MacDaddyX creates a “permanent” spoof (one that survives restarting the computer) or not. Where can I find the original MAC address?