  The J\"ulich-Bonn dynamical coupled-channel approach is extended to include
$K\Sigma$ photoproduction off the proton. Differential cross section and
(double) polarization data for $K^+\Sigma^0$ and $K^0\Sigma^+$ are analysed
simultaneously with the pion- and photon-induced production of $\pi N$, $\eta
N$, $K\Lambda$, and $K\Sigma$ final states, totaling more than 67,000 data
points for center-of-mass energies $W<2.4$ GeV. Based on the fit results the
spectrum of $N^*$ and $\Delta$ resonances is extracted in terms of pole
positions and residues. We discuss the impact of the $\gamma p\to K\Sigma$
channels in detail and investigate the influence of recent polarization data
for $\eta p$ photoproduction.
