exactly how would that ever be proven...?
Well, when the bequeathed owner of the Shroud returns, we should ask Him.
Uh; Jesus did NOT 'own' this shroud.
Joseph of Arimethia possibly put some kind of wrapping around Jesus before laying Him in the tomb; for linen wrappings were found there.
The Bible tells us that the Roman soldiers took one item of His clothes for themselves; four separate pieces; and the outer; the one piece garment; went to the lucky guy with the winning lot throw.
There is no chain of custody on the SoT that links it to Christ.
For whatever it is and whomever it was placed upon is merely conjecture.