Spotify has around 256 million tracks, and the Anna’s Archive collection contains metadata for an estimated 99.9% of them.

Spotify confirmed the incident and says it has disabled user accounts linked to it, but that won’t un-leak the music.

In a blog post titled "Backing up Spotify," Anna’s Archive explains how it believes it has built the “world’s first 'preservation archive' for music” through the move. It says it has the metadata of ...