When searching for images that are guaranteed to be copyright-free, there are several options to consider. One way is to use Google Images and select Creative Commons licenses from the Tools dropdown menu. This will narrow your search to images that are free to use and modify. Another option is to visit websites such as Unsplash, Pexels, Flickr's Public Domain Group, and Pixabay, which offer free images that do not require attribution.
Another approach is to use advanced search options in Google Images to find images that are labeled for reuse. To do this, go to Google Images and type in your search term. Then, click Tools beneath the search bar and select an option from the Usage rights menu. This will narrow your results to images that have a specified level of usage rights.
Additionally, you can also use reverse image search to find the original source of an image and check its copyright status. To do this, right-click on the image and select Search Image with Google or a similar option, depending on your browser. This will bring up a list of websites that contain the image, which you can then review to see if they provide information about the image's copyright status.
Overall, taking the time to properly search for and verify copyright-free images can help you avoid potential legal issues and ensure that you are using images ethically and responsibly.