Wis. Stat. § 129.03: Trust property.

(1) If a work of fine art is trust property under s. 129.02 when initially received by the art dealer it remains trust property notwithstanding the subsequent purchase of the work of fine art by the art dealer directly or indirectly for the art dealer’s own account until the purchase price is paid in full to the artist.

(2) If the art dealer resells a work of fine art to which sub. (1) applies to a bona fide 3rd party before the artist has been paid in full, the work of fine art ceases to be trust property and the proceeds of the resale are trust funds in the hands of the art dealer for the benefit of the artist to the extent necessary to pay any balance still due to the artist. The trusteeship of the proceeds continues until the fiduciary obligation of the art dealer with respect to the transaction is discharged in full.