Seeking Help to Verify Authenticity of M4A Metadata

I'm seeking information about the original file schema for an m4a file recorded directly on an iPhone (iPhone 5 running iOS 9.2.0).

I currently have two files from which I extracted metadata using ExifTool.

The first file was provided to me by someone who claims it was recorded on an iPhone 5 with iOS 9.2.0. I would like to verify whether this file has been edited.

  1. File Permissions: -rwx------
  2. Content Create Date: 2016:03:01 14:21:08+07:00

The second file was recorded by me on the same device model and iOS version.

  1. File Permissions: -rw-r--r--
  2. Date/Time Original: 2024:10:03 11:44:16+07:00

As you can see, the file permissions differ, and the key for the recording date also differs: one uses "Content Create Date" while the other uses "Date/Time Original." I would like to determine if the first file was edited, but I haven't been able to find any official documentation on the m4a schema or metadata structure from audio recorder apps. I reached out to support, and they directed me to this forum. Any insights or help would be appreciated.

I asked Apple developer support, none of them can answer. Amazingly Apple support in technical data is so poor. Really need helps from community.

Seeking Help to Verify Authenticity of M4A Metadata
 
 
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