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HTPBE?

Structural PDF tamper detection API. Catches edits your KYC stack misses.

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Status

Algorithm v2.37.1

Tool profile

ChatGPT

ChatGPT appears on both legitimate first-generation output and downstream re-save flows — context (the other tool on the same document) is what flips the signal.

Back to all statistics
Forensic verdict

Mixed signal

Based on this tool’s share of the HTPBE? corpus.

Modification rate
0%-48pp below baseline
Corpus baseline: 48%
Corpus share
0.10%
Share of all analyzed appearances
Modification rate
0%
-48pp below baseline
Role split
100%C/0%P
Creator vs Producer share of appearances

Corpus profile

How ChatGPT shows up in HTPBE? corpus

ChatGPT-generated PDFs are produced by OpenAI’s document export tooling around model output. This is consumer-facing AI-generated content rather than institutional output.

ChatGPT as Creator on a document whose intended type is institutional (a "bank statement", a "payslip") is itself a strong contextual signal — institutional documents are not authored by ChatGPT.

The signal
ChatGPT as Creator on a document whose intended type is institutional (a "bank statement", a "payslip") is itself a strong contextual signal — institutional documents are not authored by ChatGPT.

Role in the workflow

How ChatGPT shows up in metadata

Every PDF carries a Creator (the application that produced the original document) and a Producer (the engine that wrote the PDF). The same tool can appear in either slot, with very different modification profiles.

CAs Creator · 100%
As Producer · 0%P
CAs Creator
  • Share of appearances
    100%
  • Modification rate
    0%
  • Avg file size
    53 KB
PAs Producer
  • Share of appearances
    0%
  • Modification rate
    0%

How to read this

The Creator slot typically reflects where a document started life. The Producer slot reflects whatever wrote the bytes — and is the field that gets overwritten when a PDF is opened, edited, and saved by a downstream tool.

A higher modification rate as Producer than as Creator usually means the tool is acting as a re-saver on documents that originated elsewhere. A higher rate as Creator points to fragile workflows around the original authoring app.

Related profiles

Tools you’ll see next to ChatGPT

Other tools that frequently share metadata with ChatGPT in the same documents. Each card links to its own forensic profile.

P100% co-occurrence
WeasyPrint
Corpus share0.06%
Mod rate29%

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