Instant copyright timestamp on Polygon Blockchain.
Free. Private. Permanent.
Choose your audio (MP3/WAV) or ZIP archive.
Your device calculates the unique fingerprint. File never leaves your PC.
We write the hash to Polygon. You get a Certificate PDF.
Blockchain requires an exact byte-for-byte match. If you change metadata or re-save the file, the proof becomes invalid.
Due to high demand, free registrations are paused for today.
Service resumes at 00:00 UTC.
Hashing...
Your file is registered. Click below to save your certificate.
Check File Hash