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Token Tell

SynthID-Text · C2PA · watermark vs. signature

Runs the real keyed g-value detector over watermarked text, then signs the same words with ECDSA P-256, so you can watch one kind of evidence vanish when the key changes and the other stay binary when a byte does.

Rebuilds every experiment from scratch and drops the settings the address bar is carrying. Nothing is reloaded: the depth, the section on screen and the scroll position stay where they are.

A watermark is not a signature. SynthID-Text does not detect AI text — it detects text generated by a model carrying your key.

More precisely: the detector runs a statistical test for evidence associated with a particular watermark configuration/key. It does not establish authorship and does not prove that text is AI-generated.

One watermarked passage, scored three times on load: under the configured key, under a wrong key given byte-identical input, and once on unwatermarked text. This replays the result.