Update:
I suspect this is a variant of a process I knew as "explosive taggants." Check it out on Wikipedia.
Briefly, taggants are microscopic bits ("dots" if you like) that can be embedded in a solution or solid (like an explosive) that can later be recovered to retrieve 'tagged information. The tagged information can be used to identify an owner, or in the case of an explosive, the manufacturer (including lot number, who bought it, etc). Taggants are so small that even after an explosion the microbits are still intact and their information retrievable.
I suspect CopDots is something similar.
Best,
Casey
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