Copy-protected optical disc and method for protecting same

(57) As for summary book invention, the information mark is written in in the sector on a track, The address of a sector the track of spiral shape substantially continuous along a track about an optical disc with the anti-copying function of the type included one or more, Including a copy protection zone (PZ), the disk concerned is equipped with the copy protection zone, and two portions of the size each of two portionsThe data currently written in this zone is shared by the sector of two portions including a series of sectors addressed in the same address, peculiar to the portion to which the sector belongs to each sector of the zone -- an identifier (D1, D2) has -- it being and, And including the protected data with the specific disk concerned, the specific protected data enables existence of the above-mentioned protection zone (PZ), check of composition, and use of the data currently written in the zone, and at least 1 portion of the above-mentioned specific protected data is recorded on the above-mentioned disk. Especially the present invention is suitable for the prevention from copyright infringement of CD*ROM and a DVD-ROM type.