Collisions of 12C nuclei with a beryllium target at energies of 0.3–2.0 GeV/nucleon for carbon nuclei with proton emission at an angle of 3.5° are considered. It is shown that these experimental data from ITEP on proton spectra can be described within the framework of a hydrodynamic model for the high-energy cumulative region of the proton spectrum, taking into account the contribution from ion fragmentation for the soft spectral region in the framework of the statistical fragmentation model.