# C2PA manifest structure
<a name="c2pa-manifest-structure"></a>

When you embed a C2PA manifest in your MP4 output, MediaConvert generates a manifest with the following components:

**Claim generator information**  
Identifies MediaConvert as the service that generated the manifest.

**Format**  
Specifies the media format (video/mp4).

**Assertions**  
Includes statements about actions performed on the content, such as:  
+ `c2pa.opened`: Indicates the content was opened for processing
+ `c2pa.transcoded`: Indicates the content was transcoded

**Asset hash**  
A cryptographic hash of the media content to verify its integrity. MediaConvert uses the SHA-256 hashing algorithm for asset validation.

**Digital signature**  
A signature created with your KMS key that verifies the authenticity of the manifest. The signature includes a timestamp token from DigiCert's timestamp authority (http://timestamp.digicert.com) to ensure long-term signature validation.

The manifest is embedded in the MP4 file using a standard C2PA UUID box, placed after the FTYP box and before the MOOV box.

**Note**  
If your input file already contains C2PA manifests, MediaConvert does not preserve them in the output. Instead, it generates a new manifest.