Your best resource will be the Copyright section of our Help Center, start with these top FAQs: https://goo.gl/FzBC2x . You can also review info on fair use, creative commons, and our troubleshooter linked from there. Hope these resources help answer your questions!
Thanks for the info. After you submit your dispute, the info goes to the copyright owner and they have 30 days to respond. Here's more info on the process and what happens after you file a dispute: https://goo.gl/Wgvu8N . Hope this info helps.