It is possible to store some information in the Monero blockchain that isn't strictly related to a cryptocurrency transaction?
For example, let's say I have a txt file, I calculate its SHA1 hash and then I create a mock transaction (maybe between two wallets which I both control) to insert that hash inside the metadata. Later, when it is confirmed by the network, I can go to some explorer (e.g. https://moneroblocks.info/) and look inside the right block to check it out, and it will stay there forever (at least as long the monero blockchain continues to exist).
I was wondering if a thing like could be applicated, or, because Monero expose very little data -basically only the fee payed to the miners- it's just structurally impossible.