MP3 Content Provenance
Sign, embed, and verify C2PA manifests in MP3 files (.mp3)
What Is MP3 Provenance?
The most widely distributed audio format. MP3 provenance covers podcasts, music distribution, and audio content across the web.
With Encypher, MP3 files carry their own cryptographic proof of origin. A C2PA manifest is embedded directly into the file, recording who created it, when, and whether it has been modified. Anyone can verify a signed MP3 file for free, without authentication.
How C2PA Manifests Are Embedded in MP3 Files
- MIME Type
- audio/mpeg
- File Extensions
- .mp3
- Embedding Method
- JUMBF data stored in an ID3v2 GEOB (General Encapsulated Object) frame
- Container Type
- ID3 GEOB frame
- Verification Pipeline
- c2pa-python (native C2PA library support)
The C2PA manifest contains a JUMBF (JPEG Universal Metadata Box Format) store with COSE-signed claims. For MP3 files, the manifest is stored using jumbf data stored in an id3v2 geob (general encapsulated object) frame. The signing process does not alter the audio content itself. The manifest is metadata, not a modification of the audio samples.
Use Cases for MP3 Provenance
- Podcast distribution
- Music streaming
- Audio journalism
- Audiobooks
- Voice recordings
How to Sign MP3 Content with Encypher
MP3 signing is available at the Enterprise tier through the unified /sign/media API endpoint. Upload your MP3 file, and the API returns a signed copy with an embedded C2PA manifest.
curl -X POST https://api.encypher.com/api/v1/sign/media \ -H "Authorization: Bearer YOUR_API_KEY" \ -F "file=@example.mp3" \ -F "title=My MP3 Content" \ -F "action=c2pa.created" \ -o signed.mp3
Verify MP3 Provenance (Free)
Verification is free and requires no authentication. Any third party can verify a signed MP3 file to confirm its origin, check for tampering, and read the embedded rights information.