Will this bracelet turn my skin green?

It's less likely than with uncoated copper, at least at first. The clear protective coating on this bracelet slows the oxidation that causes that green tint, so most wearers see little to no staining while the coating is intact. Once the coating wears through with regular use, the copper underneath can react with skin chemistry the way any solid copper does. That reaction is harmless and washes off.

Why is this bracelet so shiny, and will that change over time?

The bright shine comes from the clear protective coating the bracelet ships with, not from plating or a layer over a different metal. That coating is standard on copper jewelry and slows early oxidation. As it wears with regular use, which is expected and not a defect, the copper underneath will darken and patina on its own timeline.

Is this bracelet copper-plated, and how can I be sure it's real copper?

It's not plated. This bracelet is solid copper all the way through, so there's no different base metal underneath to be revealed if the coating wears. Several video creators have resized links from this bracelet and tested the cut cross-section directly, confirming copper throughout rather than just on the surface. I'd steer you toward that kind of evidence over scratch-testing your own piece at home, since scratching through the coating damages the finish and makes the item ineligible for return.

The coating looks like it's chipping. Is that a manufacturing defect?

No. What you're seeing is the protective coating wearing through at points of friction, which is expected with regular wear and not the same thing as plating flaking off to expose another metal. The copper underneath is the same copper the whole bracelet is made of, and it will simply begin to patina where the coating has worn away.

Is this bracelet adjustable, and can I make it smaller?

It ships in a fixed link length rather than an adjustable design. Resizing smaller is possible by removing links, but it takes real jewelry tools and experience to do without damaging the piece. If you're not set up to do that yourself, a local jeweler can typically handle it for a modest fee.