Rewind is an Android and iOS app that allows you to explore music by year. You pick a year and it takes you to the year's highlights where you can sample tracks. At the bottom of each track are buttons to jump to music services where the track is available (Tidal, Spotify, Apple Music, or Youtube Music). I don't subscribe to any of those services, but when I clicked the Youtube Music icon, it just took me to the track on Youtube, which I could then play in full without payment.
For instance, I chose 1968, and was presented with these tracks, among many, many others:
It'll also show you the top 100 songs of the year and you can click on them to preview and then jump to it in the apps.
Pretty neat.