CCEGAP20: The Echo of the Big Bang in Pulsar Clocks: How the Birth of the Universe Left a Signal in NANOGrav

Calculates the stochastic gravitational wave background (SGWB) generated by the CCEGA cosmological bounce at T_QCD = 154 MeV. The bounce produces gravitational radiation at the Hubble frequency, redshifted to f_peak ≃ 8.2 nHz today — precisely the NANOGrav/SKA band. The amplitude is Omega_GW*h^2 ≃ 1.5×10⁻⁹, comparable to the NANOGrav 2023 detection. Both are fixed by T_QCD with no free parameters. The NANOGrav signal may already contain a cosmological component from the CCEGA bounce, distinguishable from the SMBHB background by its peaked spectral shape. The SKA will confirm or exclude this prediction within the current decade.