Click on the "Advanced Search" link in OneSearch:
Then make the selections highlighted in yellow below and type in the phrase "public performance rights" in the first search blank:
To check rights for an individual film, fill in the second search blank with the title of the film. Public performance rights will be listed in a "Local note". Items without this note are not licensed for public performance.
This FAQ from Kanopy addresses public screenings of films in that database:
https://libraryhelp.kanopy.com/hc/en-us/articles/1500003981461-Does-Kanopy-support-Public-Performance-Rights-