Services close. Accounts lapse. Exports go stale the day they are made. Here is what it actually takes to keep years of listening somewhere durable.
It rarely disappears all at once. It thins out one failure at a time: changing service, moving platform, stopping a tracking source, relying on a single account, or keeping only a one-off export instead of an ongoing one.
A library transfer and a listening-history transfer are different jobs. Moving playlists or saved music does not by itself preserve a play-by-play record of when you listened. The history of when you actually listened stays behind.
An export solves the moment it is made, then starts going stale immediately. Everything you listen to the day after exporting is not in the file, and most people do not remember to export a second time.
Local files rot quietly too: a CSV on a laptop that gets replaced, a drive that outlives its warranty, a backup nobody has opened in years.
None of the following are wrong. Each solves a real, narrower job than the one a durable archive needs to solve.
lastfm-to-csv-style utilities, pull a full scrobble history out of Last.fm into rows you can keep. Good for a complete, dated download of everything Last.fm has recorded, run whenever you remember to run it.Each of these keeps rows safe. None of them, on its own, keeps what the rows meant.
A CSV or an export is a backup: it preserves rows, a timestamp, an artist, a track. That much is real, and worth having.
By itself, it does not preserve what any of it meant.
Which album you kept returning to. What rose while something else quietly faded. What stayed constant across years while everything around it changed. None of that is expressed by the row alone. It emerges when the record is read across time, and a static backup does not read itself. Someone, or something, has to keep reading it.
That is not a mark against the backup. It solves the problem it was built for: getting the events out safely. A listening archive solves the next one, turning those events into a record of a listening life, read and re-read as it grows.
Not features. Principles an export alone does not meet.
Multiplicity turns preserved listening evidence into a living archive, not a static export.
Connect Last.fm and it builds from the scrobble history already there: exact, dated, and still recording afterwards. Spotify, Tidal, Deezer, YouTube Music, Qobuz and local players can all reach Multiplicity through Last.fm. Bring your Apple Music library in too, then keep it growing with native listening capture on iPhone and Mac, no export required for either.
CAИON holds the lifetime ranking. AИNUAL reads the year. ROTATIOИ reads the month. Across them, Albums, Artists and Tracks become a held, dated, source-neutral record, not just a file of rows.
Every finished CAИON is saved as a dated edition. Metaphorical Music moved to #1 between the 28 June and 9 July archived points, and remained there on 24 July. A saved edition can hold a record too, the same way: 25 plays, 5-day artist Record (CFCF, 18-22 July 2026).
A durable history is not the destination. It is what makes anything built from it trustworthy, including a ranking that holds its position because the evidence behind it is real.
See what a kept history becomes. Or capture new Apple Music listening on iPhone and Mac.
Free to build. Private by default. No card required.