Two-ply label simultaneously concealing data and displaying data

A two-ply label simultaneously concealing data and revealing data for a substrate having a substrate surface with concealable first-data thereon, the label comprising:

• a first-ply having an upwardly-facing first-ply surface and a downwardly-facing first-ply surface, the first-ply having a first-data revealing portion;
• a first adhesive on the downwardly-facing first-ply surface;
• a second-ply having an upwardly-facing second-ply surface and a downwardly-facing second-ply surface, the downwardly-facing second-ply surface opposing the upwardly-facing first-ply surface, the second-ply having a first-data concealing portion overlaying the first-data revealing portion;
• a second adhesive releasably adhering the downwardly-facing second-ply surface to the upwardly-facing first-ply surface,
• wherein the first-data is concealed by the label when the downwardly-facing first-ply surface is permanently adhered to the substrate surface by the first adhesive and the first-data concealing portion of the second-ply overlays the first-data, and the first-data is revealed when the first-data concealing portion of the second-ply is separated from the first-ply, and
• wherein second-data is disposed and displayed on a portion of the upwardly-facing second-ply surface.