Doesn't require achieving a global consensus, hence we already have had Freenet for quite a while.
electronic notary
Still no consensus required. Cheaper version: have all parties digitally sign a file with that hash, then upload it to IPFS and share the address.
Doesn't require achieving a global consensus, hence we already have had Freenet for quite a while.
electronic notary
Still no consensus required. Cheaper version: have all parties digitally sign a file with that hash, then upload it to IPFS and share the address.