Note: this proposal needs to be slighltly modified since the storage limit for OP_RETURN is 80B and does not work for all cases, but the principles will remain the same and other storage solutions exist, see https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2023-February/021398.html
Then for now some transactions mentionned in that proposal are not standard (ie not relayed by the nodes) but valid (ie a miner can include them into a block)
So, after discussion with the bictoin community, see Allow several OP_RETURN in one tx and no limited size
In case this change, which looks to be admitted by the majority, is trivial and not even a soft fork, is not implemented then please see the different workarounds at the end of this proposal