DW records JS giving stone to OC.
David Whitmer, An Address to All Believers in Christ by a Witness to the Divine Authenticity of the Book of Mormon (Richmond, Missouri, 1887), 32
After the translation of the Book of Mormon was finished, early in the spring of 1830, before April 6th, Joseph gave the stone to Oliver Cowdery and told me as well as the rest that he was through with it, and he did not use the stone any more