Just my thought, B.C.! We could follow our present practice of creating a Trade Number. So, if Bitcoin Bob buys 'Hedge003/IMZ' in Trade XYZ, then after Btc Bob's Uno turns up in my wallet, I post:
'Trade XYZ complete: Hedge 003/Bitcoin Bob' -- that is, the owner of any given Hedge at any time is the name standing after the forward slash.
Then what, I write:
Trade XYZ complete: Hedge 003/Bitcoin Bob, Confirmed by TT BitcoinCharlie
Followed by a final quoted post of:
Trade XYZ complete: Hedge 003/Bitcoin Bob, Confirmed by TT BitcoinCharlie, Agreed Bitcoin Bob
And then from time to time you can post the list of the Hedge-Holders like you do with the TT list confirming once again...