A computer system generates information describing authenticity and a grade of a collectible scanned by a scanning device. A feature vector is extracted from the information. The feature vector includes a first set of features and a second set of features. The first set of features is matched to authenticity profiles of collectible items. Each authenticity profile characterizes at least one collectible item across multiple features. A confidence score is generated with respect to the authenticity of the collectible based on the authenticity profiles. The second set of features is matched to grade profiles of the collectible items. A grade score describing the grade of the collectible is generated based on the grade profiles. The grade of the collectible is determined based on the grade score. A graphical representation of the grade and the confidence score is transmitted to a display device.