"Hey Product Hunt! 👋 I built Content Proof because I was frustrated by how expensive and complex it is to prove digital content is authentic. Traditional signing certificates cost $250+ annually and require business verification. The "aha" moment: Everyone trusts Gmail accounts already. What if we could turn your Gmail identity into a signing certificate? What makes this different: Uses your existing Gmail trust (no new accounts/certificates) Ed25519 signatures survive metadata stripping (looking at you, Instagram) QR codes make verification mobile-friendly Free for individual creators Built with modern crypto: Same Ed25519 algorithm used by Signal, Tor, and SSH. SHA-256 hashing detects even single-bit changes. Perfect timing: With AI-generated content everywhere, human creators need a way to prove their work is genuine. Would love your feedback! What would make this more useful for your content verification needs?"

Content Proof

Prove your content is real with Gmail-verified signatures

Prove your content is real with Gmail-verified signatures