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I acknowledged there is no known way to un-hash data. Im suggesting its possible, or they have figured a way to hash using a key, giving them the ability to un-hash.
Its totally theoretical, and in my opinion, would explain the massive amounts of money going into AI and mining infastructure/development.
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mmm... I think you are confusing things a little bit to much.
As far as I know, SHA-256 hashing is one-way only. so, you can’t “un-hash” data.
The idea of using Bitcoin as a verifiable timestamp layer is reasonable and I believe it has already somehow been tested. The “un-hashing” part is where the concept and your plan breaks down.