Start heating the copper evenly by moving your torch head flame around the piece (not directly on the silver). Try to heat evenly, you will be able to tell from the copper color - the brighter orange it is, the hotter.
You will begin to see the silver pieces change, they will turn softer looking before they melt. When the silver is molten you can make it move on the copper depending on how you move the torch flame. Turn torch off as soon as all the silver has melted and you are happy where the silver is positioned.
Quench in water.
See video Torching-Ring
If you are not happy with how your piece looks you can reheat it and move the silver around. Just don’t completely melt it.