The startup selling proof that a human wrote your manuscript
Vellumproof cryptographically seals each draft in a chain of hashes, with the first manuscript free and $5 a month after that.
Unpublished author Dylan Reed created a service that cryptographically seals manuscript drafts as evidence that a human wrote them. Vellumproof stamps each version with the time, then cryptographically links it to its predecessor. If you slip a draft in later or alter its date, it wi…
