Don’t forget the secular music, there’s an agreeable recording dedicated to it from Camerata Trajectina.
Check out some YouTube things - a mass from Cantus Modalis, a motet (Salve Regina) from Bjorn Schmelzer in a 2016 concert, and an earlier performance of the same motet from Capella Pratensis. Let me know if you can’t find them.
The motets have been less well treated on record than the masses for some reason. Eric Van Nevel/Currende Consort have probably done more than anyone to let us hear them. But don’t forget the wonderful Pater Noster from Anthony Rooley, in the Musicke of Sundrie Kinds set. And the equally wonderful Omnis spiritus laudet from Ensemble Daedalus.
I believe that we know more about Obrecht’s life than any other c15 composer, there’s a biographical study by Rob C Wegman which I own and I’m glad to have it, not least because of the comments on style and chronology. There are probably more up to date publications - please let me know if you find anything.