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From dealing with tons of copper pipes/fitting/joints this isn't one that I'd generally see in scrap copper.
Cut on the backside-if copper pipe, there would be no cut.
The edge looks bevelled as it was finished that way.
Why the cut? Probably for sizing or it was cut off a finger?
Hard to tell if it's totally the same width-as photo distorts the actual dimensions of the ring (looks narrower on the cut side)
If I had dug this item I would say a low priced/cheap plated copper ring.
Prize type of ring, or it actually be a ring to band a leg (bird) or something else of the same.
Most copper rings look like rings that one would assume that were purchased as gold plated and the plating wore off from the 100+ years of being buried.