The core of the archive will be the 11 tracks (often 12 with the hidden song) released on December 4, 2015. A Head Full of Dreams - Album by Coldplay - Apple Music

The query refers to the seventh studio album by British rock band , titled A Head Full of Dreams , which was released on December 4, 2015. This record marked a shift toward a more colorful, uplifting, and pop-oriented sound compared to their previous, more somber release, Ghost Stories . Album Overview and Context

- This instrumental piece serves as a bridge, showcasing the band's experimental approach to music.