The convention of the High Voltage SID Collection is to use the following format:
19yy group(s) as in: 1992 Artificial Arts, LASER Inc
Note that this switch is automatically assumed (setting the copyright to the (HVSC compatible) default string: <?> 199? unknown artist) if you are adding a header to the file, even without explicitly giving the switch.
Example: psidTool.EXE -title:"Squash?" Squash.SID /copy:"1992 LASER Inc."
Example: psidTool.EXE Squash.C64 -a Squash.SID /i0
-p#4099 -copy:"1992 Artificial Arts, LASER Inc" /title:"Squash!" -r