S3 put policy for copying object

I'm quite new in S3. My use case is that we want to copy some objects from one bucket to another (I manage both of them) as described in CopyObject - Amazon Simple Storage Service.

On the other hand we want to use Post Policies as described in Creating a POST Policy - Amazon Simple Storage Service.

My question is - is it possible to do that, or the POST policies from above are only for POST request (copy is PUT request).

Thanks!

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