Is this audio from Audexum?
Free. No account. Files are checked in memory and not kept.
Up to 25 MB. The first 10 seconds are scanned for the watermark.
How it works
Signed label
Every file we deliver has a metadata comment reading “AI-generated by Audexum” plus an Ed25519 signature. Anyone can verify it with our public key at /.well-known/audexum-provenance.json. Metadata is easy to strip, so a missing label proves nothing.
Signal watermark
An AudioSeal watermark in the sound itself. It survives one MP3 encode well; each further lossy re-encode weakens it.
Full details in our AI disclosure. To report a clip misused as a real recording, use /report.