In a saucepan, combine the coconut cream, chocolate chips, chocolate hazelnut spread, and potato starch.
Cook over low heat, whisking constantly, until the chocolate is melted and the mixture is smooth. Remove from the heat.
Transfer the mixture to a measuring cup and pour into popsicle molds. Insert sticks and freeze until solid, at least 5 hours or overnight.
For the coating, melt the dark chocolate with the canola oil in a bowl. Transfer to a tall glass.
Remove the bars from the molds and dip each one into the chocolate coating. Return to the freezer until the coating is firm.
Store the chocolate ice cream bar in the freezer for up to 1 month.