1. Reverse image search your own portfolio periodically
The most direct image search technique for a photographer is turning it on your own work. Run your best or most-published shots through Google Lens, TinEye, and Yandex on a rolling basis — quarterly is reasonable for an active portfolio. TinEye in particular is built to surface every indexed instance of an exact or near-exact copy, which makes it well suited to spotting reuse rather than just similar-looking photos.
2. Treat EXIF and IPTC metadata as your paper trail
A photo's embedded metadata — camera model, capture timestamp, and, if you add it, copyright and artist fields — travels with the file unless something strips it. Writing your name and copyright notice into a photo's IPTC/EXIF fields before you publish it means that if a stripped, re-encoded copy still carries fragments of that metadata, it's harder for someone to claim the image as their own. It's not proof against a determined bad actor, but it raises the bar.
3. Use visual similarity, not just exact matching, for cropped or edited copies
Reverse image search engines are good at exact and near-exact matches but can miss a version that's been cropped tightly, recolored, or had a filter applied. Perceptual hashing — the technique behind similarity checkers — is more tolerant of these transformations because it compares structural features rather than pixel-for-pixel data. If you suspect a specific site lifted your work, downloading their version and running it against your original through a similarity tool gives you a concrete similarity score rather than a subjective 'looks the same to me.'
4. Document before you contact anyone
Before sending a takedown request or DMCA notice, capture: the URL where your image appears, a timestamped screenshot, the reverse image search result showing the match, and your own file's metadata proving earlier capture or publication. Search engines and hosting platforms move image search results and cached pages, so evidence gathered at the moment of discovery is worth far more than evidence you try to reconstruct two weeks later.
The EXIF checker and similarity tool linked below run entirely in your browser — useful when you're comparing your own unpublished originals without uploading them anywhere.