  We show that general parity-violating 3d conformal field theories show a
double copy structure for momentum space 3-point functions of conserved
currents, stress tensor and marginal scalar operators. Splitting up the CFT
correlator into two parts - called homogeneous and non-homogeneous - we show
that double copy relations exist for each part separately. We arrive at similar
conclusions regarding double copy structures using tree-level correlators of
massless fields in $dS_4$. We also discuss the flat space limit of these
correlators. We further extend the double copy analysis to correlators
involving higher-spin conserved currents, which suggests that the spin-$s$
current correlator can be thought of as $s$ copies of the spin one current
correlator.
