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Checked fact 161015 Oct 2026Research

OpenAI says the absence of a detected watermark does not prove human authorship, and that a watermark does not identify the user.

The exact words it rests on

A watermark does not identify the user. ... The absence of a detected watermark does not prove human authorship.

What the source said when we opened it, on 15 Oct 2026.

The source

Our approach to EU text provenance rules
OpenAI · 2026-10-05

Checked

Checked by the notis newsroom on , against the source above.

In the story

How text watermarks work and what EU Article 50 requires 15 Oct 2026

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