Quality of images: The cover art must not be blurry, pixelated, mismatched, misaligned, rotated, incorrect, stretched, or have other quality issues.
The information shown in the cover image should always match the information of the metadata as accurately as possible and without any class of abbreviation.
Dimensions of the cover art:
  • Proportion: 1x1 (square)
  • Minimum size: 3000 x 3000 px.
  • Maximum size: 5000 x 5000 px. 
  • Accepted Formats: JPG, TIFF, or PNG Mode: RGB (CMYK is not available)
  • Maximum size of the file: 36 MB
The images that do not meet all the requirements above will not be supported and may not be shown in the channels.