I can't find a particular band, track, or album in the catalog
All music on the service is hosted in accordance with license agreements with the copyright holders. If you can't find the tracks you are looking for, it means that they were not included in any contracts. Additionally, part of the catalog is only available to Yandex.Music subscribers as per the requirements of rights holders.
Yandex is always attempting to expand its music catalog and tries to get as many rights holders involved as possible. Let us know what music you would like to hear on the service, and we will try to get the rights to host it. Unfortunately, we can't guarantee that we will acquire those rights.
If you want to place your own works on the service, read the terms of music placement.