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Is This Image AI-Made? Content Credentials and Watermarks

A perfect product photo, a viral video, a candidate's headshot: any of them could be AI-made. No single clue settles it. Content Credentials, watermarks and a source check together usually do.

Updated October 20, 2026

Three questions to ask about any file

  1. Where did it come from, and do we have the rights to use it?
  2. What does the file itself record about its history?
  3. Does the content match reality we can check?

If the answers are unclear, treat the asset as unverified. The bar is higher for ads, testimonials, product claims and public statements than for an internal mood board.

Content Credentials: a signed history

Content Credentials follow the C2PA standard: cryptographically signed records attached to an image, video, audio file or document. Depending on the software, they can show the tool or device that created the file, edits such as cropping or AI generation, and who published it, and they reveal whether the record has been altered since signing. Some AI image generators and cameras add them automatically.

To check a file, upload it to the free Content Credentials verify tool or look for the "cr" icon on sites that display it.

What credentials cannot prove

  • They do not prove a scene happened exactly as shown.
  • They do not prove the creator told the truth.
  • Social platforms often strip metadata on upload, and screenshots drop it entirely.
  • A missing credential does not mean a file is fake; most real photos still have none.

Watermarks, visible and invisible

A visible watermark is a logo or label on the image. An invisible one is hidden in the pixels or audio for detection tools to read; Google DeepMind's SynthID is one example used on content from Google's AI tools. Watermarks help when tools apply them consistently, but visible ones can be cropped and some invisible ones weaken after heavy editing. A watermark says which tool made something; it rarely gives the full edit history.

AI detectors are a signal, not a verdict

Detection tools look for statistical traces of generation. They misfire both ways: real photos flagged as AI, AI images passing as real, especially after resizing or compression. Use a detector to decide where to look harder, never as proof on its own.

Clues worth a second look: lettering that almost makes sense, odd hands, teeth or jewelry, shadows that disagree with the light, backgrounds that melt into patterns, near-miss logos, and video where faces shift or objects morph. A reverse image search can show whether the file appeared earlier somewhere else.

A review routine for your team

  1. Confirm the source and usage rights.
  2. Check for Content Credentials.
  3. Inspect the image or video closely.
  4. Run a reverse image search.
  5. Use a detector only as a supporting signal.
  6. Record who approved it and any disclosure used.

Labeling your own AI images honestly

Disclose AI when your audience could misunderstand what an image shows: a real customer, product result, event or facility. A short caption such as "Illustration created with AI" is enough. Keep source files, licenses and approvals, prefer tools that attach Content Credentials, and never use AI images as testimonials or before-and-after proof. Our guides on telling customers you used AI and who owns AI content cover the rest.

Where ASL fits

Provenance matters for your own records too. ASL Timestamp Anchor gives independent proof that a file existed at a moment in time without uploading the file. Our custom software development team can build provenance and approval checks into your content workflow. Contact us to talk it through.

Frequently asked questions

How can I tell if an image is AI-generated?

Combine checks: the source, Content Credentials, a close visual inspection and a reverse image search. Detectors help but are not proof.

What are Content Credentials?

Signed records based on the C2PA standard that travel with a file and can show how it was created and edited, and whether that record was altered.

If an image has no Content Credentials, is it fake?

No. Many real photos have none, and platforms often strip metadata. Missing credentials only mean you need other checks.

What is SynthID?

Google DeepMind's invisible watermark for content from Google's AI tools, readable by detection tools rather than the human eye.

Should my business label AI-generated images?

Yes, whenever people could mistake the image for a real customer, product result or event. A short caption is enough.

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