Vellumproof
Vellumproof provides authors with a tamper-evident, timestamped record of every draft and writing session of their manuscript, creating a verifiable timeline that proves the work's human authorship and progression over time. Authors upload drafts in common formats, which are sealed and chained to prevent alteration, enabling publishers or contests to confirm authenticity via a shareable proof page without accessing the author's private files. The service prioritizes privacy, never sharing or using the prose to train AI, and offers a free first manuscript vault with ongoing paid options for multiple projects.
