Test file
ChatGPT / GPT-4o · PNG
The original PNG contains an OpenAI provenance manifest that the official C2PA reader can parse.
- Version
- Not provided by upstream
- SHA-256
7cd57b4a33f0…
DALL·E 3 / OpenAI provenance
Inspect OpenAI image provenance locally
Read C2PA separately from ordinary text, EXIF and XMP. Create a derivative without supported embedded sections while keeping the original intact.
CONTEXT / EVIDENCE
OpenAI documents provenance, not a guaranteed prompt field
OpenAI says images generated with ChatGPT, Codex and its API include C2PA metadata. The signed claim is a provenance signal and can be removed accidentally or intentionally, so its absence does not establish how an image was made.
C2PA does not mean that a complete private prompt or seed is guaranteed to be stored as readable text. ClearTags reports what this particular file contains and can remove supported embedded metadata from a new publishing copy.
TESTED FILE / CHATGPT
One real ChatGPT export, checked end to end
Our Lab includes a redistributable ChatGPT / GPT-4o PNG from the Content Authenticity Initiative example corpus. The upstream record does not state the exact ChatGPT build or generation settings, so neither do we.
Verified result
The production cleaner removed the supported metadata, reinspected the copy and kept the PNG image payload hash unchanged.
ClearTags Lab documents each fixture's scope and publishes its complete hashes.
Keep three signals separate
C2PA · EXIF · XMP · CONTAINERSigned OpenAI claim
A readable manifest can identify the claim generator and declared provenance associated with the asset.
Prompt-bearing fields
EXIF, XMP, PNG text and comments are inspected separately because a full prompt is not guaranteed by C2PA.
Non-metadata signals
Metadata cleanup does not remove a signal embedded in image content itself, including an invisible watermark.
Create a metadata-clean derivative
WORKFLOW / LOCAL COPY- 01
Keep the downloaded original
Preserve the source image if provenance or generation history may matter later.
- 02
Inspect the exact export
Review C2PA, EXIF, XMP and text fields in the asset you plan to publish.
- 03
Select embedded sections
Remove the supported provenance or plain-text metadata you do not intend to distribute.
- 04
Reinspect the new copy
Confirm the report after cleanup rather than assuming every provenance mechanism was removed.