>>12538179idk if you understand the raw mechanics of blockchains and what they offer.
PoW blockchains are basically a huge race for "rare" numbers, when you find enough of those numbers you get to mint a new "block", which gets appended to the chain.
you'll also select some transactions, smart-contracts or whatever to witness alongside, and collect fees.
then you show your chain to other miners and they verify you found those rare numbers, those transactions are legit, and they'll use your chain as the source of truth.
also some algorithms happen and a new "rarity" (difficulty) is decided.
after a handful of confirmations of your transaction you can consider it immutable.
it would take more than 51% of the computing power to dominate the chain and block transactions, but even then you couldn't forge them.
you could censor and double-spend tho.
anyway NFTs are not primarily about record of proof or such, it's about owning an autograph of an asset (in a transferable sense).
you can definitely sign documents and "witness" them with a blockchain, just put the sha256 in an OP_RETURN of bitcoin, I think DocuSign offers this?
not what NFTs are about tho.
