I hope this is not completely off-topic and NO, I'm not talking about covert-art.
These days of quarantine pushed me to take a look and "standardize" my MP3 library, so I found a lot of "cover" songs tagged in many, different, ways and I would like to know I'm listening to a cover. So, how do you tag cover songs? I found two possible, not yet tested, solutions: [SNIP]
While I was writing this I tried to search for it and found out that there are a lot of "Original..." tags, and "Original artist(s)/performer(s) (TOPE)" on both ID3v2.3 and .4 and now I put it on MP3Tag "TAG panel" but...does iTunes or Plex player show this information somewhere somehow?!