No. You should never melt your chocolate in a crock pot because it will burn. Crock pot temperatures vary depending on the manufacturer, but an average low setting is approximately 180 degrees F, and warm is about 165 degrees F.
Chocolate should never be taken over 110-115 degrees F. The easiest way to melt chocolate is in a microwave. Place it in a plastic bowl (glass isn’t a good option because the sides get too hot) and microwave it on half power for 20 second intervals. Take it out a stir it in between each melting interval. Use a thermometer to make sure that the temperature doesn’t go over 110 degrees F. Temper if necessary. Ultimately, each chocolate should end up at a different temperature:
Dark Chocolate: 88-90 degrees F
Milk Chocolate: 87-88 degrees F
White Chocolate: 86-87 degrees F