I picked India and a random year, 1985 [1]. The number 3 song caught my eye cause it had the thumbnail of a famous movie that came out in 2004, although the correct song played. When I went to the linked Spotify playlist for that year, the included song at number 3 was wrong and linked to the song from the 2004 movie.
Not sure what the data source is, but needs a little bit of cleaning and validation. Not critiquing, this project is awesome, just giving a heads up.
Thanks for the feedback! Yes, there are still some inaccuracies that I am fixing manually. I implemented a suggest feature so that I can get some external help to expand and polish: https://88mph.fm/suggest