In three lines
- Content Credentials can record an image's origin, editing process, tools used, and use of generative AI; digital signatures help reveal tampering.
- Missing credentials do not prove an image is AI-generated. Metadata may have been removed or never added.
- Cross-check online results against the original publisher, reverse image search, and visible anomalies. For sensitive images, review the privacy policy before uploading or use a local tool.
What are C2PA and Content Credentials?
C2PA is an open technical standard for expressing the origin and edit history of digital content. User-facing products call this record Content Credentials. Credentials linked to an image may include creation and editing tools, timing, edit actions, and information indicating generative-AI use.
Cryptographic hashes and digital signatures verify whether a file or record changed after the credential was attached. This is a provenance record, not a detector that calculates an AI probability from pixels.
How to check for free
- Obtain the original file when possible. Screenshots or files re-saved by messaging apps are more likely to have lost their credentials.
- Adobe Content Authenticity Inspect and choose a file or enter a public image URL. Its official documentation lists support for multiple image, audio, video, and PDF formats.
- Check the recorder and status. See who or what product recorded it, whether the signature chains to a trust list, and whether validation warnings appear.
- Expand the action history. Look for creation or editing tools, AI-related actions, source ingredients, and later changes.
- Save the result, but do not treat it as a standalone verdict. Continue with source and visual cross-checks in the next section.
If the format is difficult to inspect, keep the original and convert a copy with Tool Web's image format converter. The converted copy may lose metadata or Content Credentials, so do not treat its result as the result for the original file.
How to read the result
| Displayed result | What it tells you | What it does not tell you |
|---|---|---|
| Valid credential | Whether the shown provenance is bound to the file and unchanged since signing | Whether the claim or scene depicted is true in the real world |
| AI creation or edit recorded | A signal that generative AI was used in the recorded workflow | Any earlier work omitted from the record |
| No credential | The inspector did not find an associated record | Whether AI made it or whether the image is trustworthy |
| Invalid or unknown signature | More checks are needed for a changed file, damage, or an unrecognized signature | Whether the cause is malicious manipulation or a routine processing error |
The key rule: valid Content Credentials verify the record's binding and integrity, not the truth of the image's content. Conversely, a real camera photo may have no credentials.
Additional cross-check checklist
- Original source: identify who first posted it, when and where, and whether it is an original from an official account or reputable outlet.
- Reverse image search: look for earlier posts, the source with a different caption, or an uncropped version.
- Context: use independent sources to check whether the location, date, weather, and event schedule match the claim.
- Visual anomalies: zoom in on fingers, text, repeated patterns, reflections, shadows, and broken edges. Their absence does not prove a real photo.
- File comparison: compare size, resolution, and cropping against the original supplied by the publisher.
Limitations and privacy precautions
- C2PA is optional. A legitimate image made with an unsupported camera or editor may have no credentials.
- Social-media re-encoding, screenshots, conversion, and metadata stripping can remove records. Watermarks or fingerprints may rediscover some credentials, but recovery is not guaranteed.
- Even with a valid signature, separately assess whether the recorder is trustworthy and whether earlier unrecorded steps exist.
- Files uploaded to an online inspector may be sent to an external service. Before uploading IDs, faces, medical or business secrets, or location data, review its privacy and retention policies.
- Do not create a public URL for a sensitive file. Technical users can consider the official open-source C2PA CLI to inspect the manifest locally.
Bottom line: C2PA is not an “AI detector” but a strong clue that verifies an image's provenance record. It is most useful alongside credentials, publishing source, and visual and contextual evidence.
Review basis and related tools
Fact check: 2026-08-07. C2PA 2.4, the C2PA FAQ, Inspect documentation, and the official open-source CLI guide were cross-checked. The article keeps credential presence and signature status separate from whether an image's depicted claim is true.