School Library Journal maintains a list of publisher permissions for read-aloud use of their books in your online storytimes and programs. This list is updated as new information is received from publishers:
Given ongoing pandemic conditions, some publishers have extended blanket permissions through spring 2021 or beyond. Check specific publishers for detailed instructions. Some listings may not be up to date. See individual publishers' websites for the latest information.
Separately, librarian Janis O'Brien Comer maintains a Google Sheet with updated permissions information from approximately 30 publishers for at-a-glance convenience.