Your photos don't get thrown out just because someone claims they were edited. The other side has to back that claim up, usually with a forensic examiner, and what that examiner looks for is more specific than most people expect. Here's the real process, and where you stand depending on what you have.
The claim doesn't win by itself
An allegation that a photo was altered is not evidence. It's a position the other side has to support, typically through their own expert or through cross-examination of yours. Courts and adjusters don't take "this looks edited" at face value any more than they'd take "this looks real" at face value. Someone has to show it.
That said, the allegation shifts the conversation. Once it's on the table, you're no longer just presenting a photo as proof of a condition. You're now also defending the photo itself as a piece of evidence. Two different arguments, and the second one is the one that decides whether the first one gets heard at all.
What a forensic examiner actually checks
If this goes far enough that someone hires a digital forensics expert, here's roughly what they're looking at. None of it is mysterious, and none of it is instant.
Error level analysis (ELA). This looks at compression artifacts across the image. JPEG compression is not uniform. If part of an image was edited and re-saved, that region often compresses differently than the untouched parts, and ELA can sometimes expose the boundary. It's a real technique, but it has false positives. Some cameras and editing pipelines produce ELA irregularities on genuine, unedited photos too.
Quantization tables. Every JPEG encoder embeds a quantization table, a kind of fingerprint for the software and settings that compressed the file. An examiner can compare the table in your photo against the tables known to be used by specific phone models, apps, or editing software. If your photo claims to be a straight-out-of-camera shot from a specific device but carries a quantization table associated with a photo editor, that's a real red flag. If the tables match the claimed source, that's supporting evidence, not proof.
Metadata consistency. This is the EXIF data: capture date, GPS coordinates, camera model, sometimes even lens information. An examiner checks whether the metadata is internally consistent and whether it matches the story you're telling about the photo. Missing metadata, mismatched timestamps, or metadata that doesn't match the claimed device all raise questions.
Device fingerprints. Sensor noise patterns, lens distortion signatures, and other artifacts specific to a camera model can sometimes be matched against known reference images from the same device. This is more common in higher-stakes forensic work and takes real expertise to do credibly.
None of these techniques produce a simple yes or no. They produce an opinion, built from multiple signals, that a qualified examiner is willing to testify to. And any one of them can be contested by the other side's own expert. This is why these disputes often turn into a battle between two paid experts rather than a clean technical resolution.
"The metadata looks fine" is a weaker answer than it sounds
If your first move is to point at the EXIF data and say the timestamp checks out, understand what that argument is actually worth. Metadata is editable. Not exotic hacker-tool editable, ordinary consumer software editable. Timestamps, GPS tags, device fields, all of it can be changed with tools anyone can download in a few minutes.
That doesn't mean your metadata is fake. Most of the time it isn't. But "the metadata looks fine" and "the metadata is trustworthy" are not the same claim, and a competent opposing expert knows the difference. If your defense stops at showing clean-looking EXIF data, you've shown that nothing looks obviously wrong. You haven't shown that nothing was changed. Those are different bars, and only one of them tends to hold up under real questioning.
If nothing was recorded at the time, this gets harder
Here's the part that's uncomfortable but true. If you didn't do anything to establish the photo's authenticity at the moment you took it, your position now depends on reconstruction after the fact. You're pulling together whatever corroborating pieces exist: phone backup logs, cloud upload timestamps from a service you didn't control, a text message where you mentioned the photo, a witness who remembers seeing it. Each piece helps. None of them is dispositive on its own, and a determined opponent will attack each one individually.
This is where the argument stops being about proof and becomes about process and corroboration. Can you show a consistent, plausible chain of how the photo came to exist and reach you? Can your expert build a credible narrative from the technical signals plus the surrounding facts? That's a real path to winning, and people win these disputes this way regularly. But it's slower, it costs more in expert time, and the outcome depends more on how convincing the whole picture looks than on any single hard fact. If nothing was locked down when the photo was taken, there is no shortcut back to that certainty now. Be honest with yourself and your attorney about that going in.
What would have changed the shape of this argument
None of this fixes what's already happened. But it's worth understanding what a different starting point looks like, because it changes the next dispute you're in.
If you'd generated a cryptographic hash of the photo file the day it was taken and anchored that hash to a public blockchain ledger, the question "was this altered" stops being an argument between experts and becomes a check anyone can run. A hash is a fingerprint of the exact bytes in the file. Change a single pixel, strip a metadata field, re-save it at a different compression level, and the hash comes out completely different. If the hash anchored on day one matches the hash of the file you're presenting now, the file is byte-for-byte identical to what existed on that date. Not "probably." Identical.
That's what ProofLedger does. You hash the file locally, the file itself never leaves your device, and only the hash gets anchored to Polygon and Bitcoin. Anyone, including opposing counsel, can independently verify the anchor without trusting ProofLedger's say-so, because the record lives on a public ledger, not in a vendor's database.
To be clear about what this does and doesn't establish: a hash anchor proves a specific file existed, unchanged, at a specific point in time. It does not prove who took the photo, what the camera was pointed at, or that nothing happened before the anchor. It gives you one fact, cleanly: this exact file, byte for byte, existed on this date. In a dispute over alteration, that one fact is often the entire question. But it only works if it happened before the dispute started. It isn't something you can go back and apply to a photo you already have sitting on your phone from six months ago and expect the same certainty.
If you're taking photos now that might matter in a future claim or dispute, anchoring them at capture is the move that keeps this exact argument from happening to you next time.