The Booru contains a tag category copyright which is used to mark any recognizable copyrighted franchise/fandoms that is not TWI as well as engines/websites that were used to create some images. These are all current tags of this category:
copyright:a_practical_guide_to_evilcopyright:attack_on_titancopyright:avatar_the_last_airbendercopyright:babar_the_elephantcopyright:batmancopyright:beybladecopyright:character_creator_3copyright:dark_soulscopyright:dccopyright:death_notecopyright:discworldcopyright:disneycopyright:doctor_whocopyright:doomcopyright:dragon_ball_zcopyright:fist_of_the_north_starcopyright:frozencopyright:fullmetal alchemistcopyright:gravity_fallscopyright:half-lifecopyright:halocopyright:hell's_kitchencopyright:heroforgecopyright:jojo's_bizarre_adventurecopyright:kirbycopyright:mariocopyright:melascopyright:metal_gearcopyright:minecraftcopyright:narutocopyright:nier:_automatacopyright:personacopyright:persona_5copyright:peanutscopyright:picrewcopyright:picrew_13338copyright:picrew_191322copyright:picrew_137904copyright:picrew_343731copyright:pokémoncopyright:rick_and_mortycopyright:rick_yourselfcopyright:rwbycopyright:sailor_mooncopyright:shrekcopyright:simscopyright:sims_4copyright:skyrimcopyright:soul_eatercopyright:spider-mancopyright:spongebobcopyright:star_warscopyright:steven_universecopyright:undertalecopyright:warhammer