We track songs if they have any of the following:
a radio play
a chart entry
a playlist entry (this is the most common scenario)
We have been operating since 2015 and have been collecting new profiles ever since.
If we discover a new artist along with a new song, we add that artist to our tracking and do two things:
We get the complete artist discography from streaming platforms
We start collecting metadata and platform identifiers/metrics
If the song does not have any of the above, it's possible we missed it. In that case, our users can add songs or artists to Soundcharts using the dashboard or the API - with the 'Get song/artist by platform ID' endpoints.