Detect Watermark

Check whether a clip carries the watermark Speechify seals into audio it generates. Upload the audio as audio; nothing about it is stored, and no voice is read or written.

Read the answer carefully in one direction. A watermarked: true is positive evidence that the audio came from Speechify synthesis. A watermarked: false is NOT proof that it did not: only models redeployed since the watermark shipped mark their output, the detector needs at least three seconds of clear speech to judge, and re-encoding or changing the speed of a clip degrades the mark. Treat a negative as the absence of evidence rather than as evidence of absence.

Checks are rate-limited well below the synthesis budget: this is a forensic question, not a data-plane call.