Try opreturn.net, probably it would help you as it may deliver searching results from the content of OP_Return on a few relevant networks including bitcoin.
Thanks for pointing me to this website that actually never popped out in various research I have done so far.
Actually, searching for OP_returns in the Bitcoin Blockchain seems disabled.
Can you explain, like I'm 5, how to search the word "brink" on the Bitcoin blockchain using I-return.net?
Oh. it seems that the connection to btc is disabled at the moment, which is very strange for me. This site is among my bookmarks and last time i have used it
(around half a year ago) this connection was active. For the search particular word you had to input it into search field on the front page but right now such action results in the following message:
Probably, some temporary problems with their node, who knows, should check it in few days.