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Introduction
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A picture can circulate far from its original page. Searching for earlier or similar versions can help restore the caption, date, location, and context that were lost.
Reverse image search uses an image as a starting point for finding matching or visually similar material. It can reveal useful leads, but the results still need to be read and checked.
The method is most useful when you know which claim you are investigating. Are you checking whether the picture is current, whether it shows the stated place, or whether an important part was cropped out?