jm ]%ZþÖzEÞ}»ÉEñ~~ëüß0C ~LNo, op_return increases the price of the transactions and doesn't prove anything IMO, anybody can send transactions with the same message, what does it prove?
https://whatsonchain.com/tx/f78ea88043428288e57ba967c05bc82e25aac46d0ea1a6239df883df3bd918d6