Tithe.ly ChMS is not responsible for any mp3s, charts or lyric files you upload, and it’s illegal to share any file you do not have a license for. If you own all the copyrights to a song (you may have written a song or obtained a license to distribute it electronically), however, you are free to upload it to Tithe.ly ChMS.
You can obtain a CCLI License which covers the distribution of lyrics, charts & self-recorded audio of your band for most worship songs. However, to be safe it would be worth double checking that your license allows you to do so.
Christian Copyright Solutions is also a great resource for finding more information about copyrights.
If you can’t get copyrights, a great way to provide song audio and information is to link to the song at an online music store or a streaming service.