Wait... You're talking about Git, right? Brilliant idea! You could sign a pull request, and once it's signed, you can then merge the businesses. But how do you show a diff of the signature? And what if it's not for a corporate merger?

But what keeps someone from forking your git repository and insisting that their HEAD is the source of truth? How can we get a globally agreed upon source of truth?

That’s just crazy talk. Corporate mergers are the only transactions there are!

It could probably be done with a merkle based signature log that whoever is hosting the service could provide.

To cheat, the party hosting it would probably have to forge signatures for everyone after the disputed signature.

As long as we're talking about non-cryptographic-signatures, the party hosting the e-signing software can claim any signature to have happened at any time. The whole point was DocuSign would be unlikely to do this.

someone should combine a chain of blocks for identity management with one for financial transactions/tokens and one for signature attestation. We could call it the cube chain and usher in web 4.0.....

I have Zero Knowledge about this topic