Audio recordings aren't good enough, this is why I keep 24x7 recordings of my life in 8K (4320p) raw YUV 4:4:4 color space video with uncompressed 24-bit audio. The NVME RAID array bills are getting a bit steep, however.
Yeah not only are we dealing with third party consent issues…but that kind of log is not going to hold up in court as OP suspects
It does not really prove anything. So you have a bunch of blank audio files with timestamps when a crime was committed and you were asleep? I think I can create that trail pretty easily for any date and time I want.