C2PA content credentials
Signed metadata in an image can provide provenance details such as the issuer, generation model, and creation time. It offers richer context, but may be removed during sharing, conversion, or editing.
For PNG · JPG · WEBPCONTENT PROVENANCE
Check whether images or audio
came from OpenAI
Use this OpenAI image and audio checker to verify C2PA Content Credentials and SynthID watermarks from supported tools including ChatGPT, the OpenAI API, and Codex.
01
Upload a file
Verify one file at a timeDrop your file here
or
Image
PNG · JPG · WEBP
AudioMP3 · WAV · AAC · FLAC · OPUS · PCM
Supported OpenAI sourcesChatGPT · API · Codex
Two provenance signalsC2PA and SynthID
Single file verificationUp to 50 MiB · audio up to 60 seconds
02Two signals,
Two signals,
one clearer answer
SynthID digital watermark
An invisible watermark embedded in the media itself. It may survive some compression or editing better than regular metadata, although major changes can still weaken the signal.
For images and audio03Verify a file as close
Verify a file as close
to the original as possible
- 01
Upload one file at a time
A single file result is easier to interpret and matches the API verification flow.
- 02
Prefer the original image
Screenshots, crops, compression, metadata removal, and format conversion can weaken or remove provenance signals.
- 03
Use 10 to 60 seconds of audio
Upload a clear excerpt and keep the total decoded duration within 60 seconds.
“Not detected”
does not mean “not AI.”
Metadata may be removed during sharing or conversion, watermarks may be damaged by major edits, and older models may not include these signals. This tool only checks supported OpenAI provenance signals. It is not a universal AI detector and does not judge whether content is true.
Content provenance gives editors, platforms, creators, researchers, and the public more context about where media came from, helping people decide what to trust, share, or investigate further.
Verify a file ↑04What else should you know
What else should you know
about the result?
FREQUENTLY ASKED
08Answers are based on the OpenAI Verify and Content Provenance API documentation.01What exactly does this tool check?
It checks an uploaded file for supported OpenAI content provenance signals and reports C2PA content credential and SynthID digital watermark results separately. It does not guess the source from visual style.
02What content can it detect?
It is designed for content generated or modified by supported OpenAI tools such as ChatGPT, the OpenAI API, and Codex. It currently supports PNG, JPEG, and WebP images, plus MP3, Opus, AAC, FLAC, WAV, and PCM audio.
03What does a detected signal mean?
It means the file very likely came from a supported OpenAI tool. A detected signal is strong provenance evidence, but it is not a complete file history and does not explain how the file was shared, used, or modified later.
04Can it detect content modified by OpenAI?
Yes. When a user asks an OpenAI tool to modify a file and the model creates a new file reflecting that change, the new file may contain detectable provenance signals. This tool does not reconstruct every editing step.
05Can it tell whether content is true or misleading?
No. Provenance signals only indicate whether supported evidence of OpenAI generation is present. They do not judge factual accuracy or completeness of context and should not be used alone for high risk decisions.
06What does it mean when no signal is detected?
It only means no supported signal was found in this check. It does not prove the content was human made. Metadata may have been removed or altered, a watermark may be damaged, the file may come from an older model, or another company’s AI system may have created it.
07How can I get a more reliable result?
Upload the original file whenever possible and verify one file at a time. Avoid screenshots, crops, and format conversion for images. For audio, use a clear 10 to 60 second excerpt and keep decoded duration within 60 seconds.
08How is my uploaded file handled?
This site does not write your file to local disk. It sends the file directly to the OpenAI API for verification. Zero Data Retention does not apply to this API. See the OpenAI API data controls policy for details.