I’ve got some AA credits and want to utilize them on AS operated flights.
I’m doing the painstaking google flight search trial and error search
Their DOT application is a blanket agreement WRT domestic flights. The codes will be placed on flights that best allow connections between AA and AS operated flights and vice versa. I have some data that does have codeshare info, but it's for AA, and not AS operated flights, so won't be of use here.
If you can elaborate on what you're trying to do I can try to help further.