To determine the copyright owner of a photo or video found online, start by looking for an image credit or contact details. A caption may include the name of the image creator or copyright owner, along with an email address or link to their website. You can also use tools like PicScout Search or TinEye to locate the copyright holder's details. If you know who the copyright owner is, you can contact them directly to ask for permission to use their work. Additionally, you can search copyright records through the Copyright Public Records Portal, which offers online records from 1978 to the present. If you are unsure whether the work is copyrighted, consult the US Copyright Office's Fair Use FAQs for guidance on using someone else's work. Remember that the owner of an image is typically the photographer, who can grant you the right to use their image legally through licensing platforms like EyeEm Market. Finally, note that when you post content to the web, you retain ownership of your copyrighted material, but you may need to be aware of the licenses you are granting to platforms to use your content.