Content Credentials
C2PA Detector for AI Image Provenance
Use this C2PA detector to read Content Credentials, the signed records that can describe how an image was created or edited. Slop or Not reads the credential, validates signatures from recognized issuers, and reports the source it recognizes, then scores the pixels with a classifier when no readable provenance resolves the file. Online checks stay away from outside AI companies.
The only AI image detector that reads Google DeepMind's SynthID watermark from both Google and OpenAI images.
Google's own detector checks only Google's images. OpenAI's checks only OpenAI's. Slop or Not reads both.
What it checks
Read Signed Content Credentials Before Trusting a Score
Signed Content Credentials embedded in the file
Generator, editor, and action history from readable manifests
Image classifier output when no readable provenance or watermark resolves the file
Good Uses
- Checking whether a file came from ChatGPT, Firefly, or Designer
- Reviewing provenance before publishing an image
- Explaining why a screenshot lost its original content history
Limits to Know
- Credentials can be stripped by screenshots or file conversions
- Strong provenance evidence requires a validated signature, a trusted or recognized signer, and a relevant assertion
- A missing credential proves nothing, and even trusted provenance does not prove authorship, ownership, content truth, every-pixel AI origin, or an unchanged history
FAQ
C2PA Detector Questions
What is C2PA?
C2PA is the standard behind Content Credentials: a signed record that can describe how an image was created or edited and which tool made the claim.
Is a C2PA match stronger than an AI score?
Yes, but only when its signature validates, the signer is trusted or recognized, and a relevant assertion supports the claimed history. Slop or Not reports the source it recognizes from a credential; verify the full signer and assertion chain in a dedicated C2PA viewer before leaning on it. The image score remains separate and still helps when no readable provenance resolves the file.
Can C2PA metadata be missing from AI images?
Yes. Screenshots, uploads, and file conversions can remove C2PA metadata. That is why Slop or Not also checks the image itself.
Does Claude add Content Credentials to images?
Yes. Supported image files made or processed with Claude can carry a signed C2PA Content Credential. Slop or Not reads the credential and reports the source it recognizes. A credential whose recorded history points to Claude can support Claude involvement, but the reader must make that interpretation; verify the signer and assertion chain in a dedicated C2PA viewer when it matters. Pixel analysis is separate and takes over when no readable provenance or watermark resolves the file.
Run the Next Check on Your iPhone or Mac
The Slop or Not app checks images and text on-device, so nothing you check ever leaves your device.
Related checks
Compare Related Detector Workflows
AI Watermark Detector
Use this AI watermark detector and checker to read image SynthID, verified C2PA Content Credentials, and IPTC metadata before any pixel check.
SynthID Detector
Free SynthID detector: check an image for Google and OpenAI SynthID watermark signals online, or run the check on-device on iPhone and Mac.
ChatGPT Image Detector
Free ChatGPT image detector and checker. Slop or Not reads OpenAI C2PA and SynthID watermark signals, then checks the pixels. No account needed.