Here is the conversation between the child and oda who confirmed odens paradise shirataki which he used on the mountain god was imbued with CoC.
The very same thing could be applied onto zoros ashrua tbh.
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By him stating that Oden used CoC on the attack with the mountain god, he also states indirectly that he used it against kaido aswell. Tougen Totsuka however does have the black lightning, which is sometimes an indicator for CoC. The manga basically states itself that ryou alone is too shallow by kaido and luffy stating it.