Verify an image’s origin without jumping to conclusions

Which claim are you checking?

‘I took this photograph here this morning’ contains at least three claims: location, date and a relationship to the person posting it. These are separate questions. You may establish the location without being able to date the photograph.

Keep the starting publication, its caption and its date. Work on a copy of the image. Record whether you have the published file, a screenshot or a thumbnail: they offer different amounts of detail. A filename such as original-photo.jpg is not evidence of origin.

Our example is a photograph of the Pont du Gard attributed to Emanuele and distributed under CC BY-SA 2.0. Its Commons record distinguishes a declared capture date in 2007 from an upload in 2012. This distinction is the starting point of the exercise.

Look before you search

This view offers three levels of arches, a large arch over water and pale rock as comparison points. None is especially distinctive on its own. Their relative arrangement is more useful: what lines up, what overlaps, where does the river pass?

Describe before naming: ‘three stacked rows of arches’ rather than ‘the Pont du Gard’. This helps you avoid looking only for pictures that confirm your first guess. The monument’s official page documents its three levels; another view can help compare their arrangement.

Sky, water colour and vegetation may suggest a hypothesis, but vary with season, light and image processing. In this first exercise, give the fixed structure more weight than the photograph’s atmosphere.

Reverse image search produces leads

Reverse image search looks for matching or visually similar images from an input image. Its results depend on what the service has indexed. Finding no result proves neither originality nor recency.

Start with the whole image. If the results are unhelpful, try a copy cropped to a distinctive feature, followed by a text search based on what you observed. Cropping can also remove the context that distinguishes two locations, so compare results against the full image.

Uploading to an external service sends the file to its operator. Practise with public images whose rights and content allow this use. Do not send private documents, sensitive images or faces for identification. References explain the technique; they do not endorse every service they mention.

Open the result pages. A similar thumbnail may show another photograph of the same place. Compare perspective, shadows, clouds and small details. A matching subject and reuse of the same photograph are different findings.

1. Search the whole image.
2. Try a distinctive region if necessary.
3. Open the page hosting the result.
4. Check whether it is the same photograph, then record its context and date.

Build a publication timeline

Publication date and capture date are different. Our photograph’s record lists 14 October 2007 as the capture date and 13 February 2012 as the Commons upload. The first is declared information; the second documents the file’s presence in that history.

Now imagine a 2026 post using exactly this photograph with the caption ‘taken this morning’. Finding the same picture in the 2012 history disproves the new capture claim. You do not need to establish the precise day in 2007 to show that the image already existed.

Use ‘earliest occurrence found’ until you can establish first publication. A page may have disappeared, escaped indexing or used another address. Dates in search results are leads to check against the underlying documents.

Treat metadata as evidence to assess

A file may contain a date, camera model or coordinates. These fields can help, but can also be missing, edited or produced by an incorrectly set clock. A platform may strip them when publishing. Missing metadata does not establish manipulation.

Inspect file properties with a local tool if available. Distinguish the file’s creation date on your computer, its declared image date and the page’s publication date. Downloading the photograph today does not make it a new photograph.

Do not automatically reproduce all metadata in a public report. An exact coordinate may be unnecessary to your argument and sensitive for the creator. Keep only what supports the conclusion.

Match your conclusion to the evidence

State separately what you establish about location, circulation and capture date. Here: the subject matches the Pont du Gard; the same photograph is documented on Commons in 2012; the 2007 capture date is attributed by the file record and has not been independently verified here.

An authentic photograph can accompany a misleading caption. Conversely, compression, an unusual edge or missing metadata does not establish AI generation. Deciding whether an image was fabricated takes more evidence than a visual impression alone.

When sharing an analysis, cite the useful pages and show your reasoning. You can correct a caption without accusing its author of lying: the age of the image does not establish the poster’s intent.