I have some files (e.g. of 10MB in size, think of it as a paper, an article, a photo, etc), and want to permanently prove that "at 2022.05.24, I already come up with such a file with such content".
So, is it possible to be done via bitcoin? My very naive thought is that, transferring some bitcoin with "attachment" being the hash of my file. Then, since this money transfer record is permanently unmodifiable and visible to everyone, I prove that I have it at this time.
In addition, can this be evidence in, for example, courts?
I am new to blockchain/bitcoin so I am not sure whether this thought is reasonable or not. Thanks for any suggestions!
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