Method for generating tracing information for solid objects made from metal, synthetic or natural material (2), manufactured through the steps of providing an unrefined piece (3); subjecting the unrefined piece (3) to a plurality of transformation steps (5,6,7,8,9,11,14,17,18,22) so as to obtain the solid object (2) with the desired shape and material characteristics, wherein said transformation steps (5,6,7,8,9,11,14,17,18,22) comprise one or more heat treatment steps (5,6) such as to modify the mechanical characteristics of the piece (3) and/or one or more deformation steps (7,8,9,11,14,17,22) that modify the shape of the piece (3), subjecting the unrefined piece (3) or the solid object (2) obtained from it to at least one control step, wherein the method comprises the steps of: - equipping the unrefined piece (3), before the transformation steps, with a permanent individual marking (19) having an encoding field (39) with areas in bas-relief (42) in said unrefined piece (3), that comprises an identification code (20) of the single piece (3) and that permanently identifies the single unrefined piece (3) and the single solid object (2) obtained from it during manufacture, reading the individual marking (19) applied to the unrefined piece (3) and storing the identification code (20) read in a database (21).