1. Your text is hashed with SHA-256 — a one-way function.
Independent. Mathematical. Verifiable.
Have a SHA-256 hash? Paste it. If it’s in The Tower we’ll show you the full proof receipt — cryptographic, independently verifiable. Free because the hash itself is already proof you’ve seen the content.
Have the original text but not the hash? Pay $5 and we’ll search The Tower for you. If we find a match you get the full proof receipt; if not, no match. The $5 is for the lookup service — if you can compute SHA-256 yourself, use the free path above.
Verification is independent and mathematical. No trust required.
1. Your text is hashed with SHA-256 — a one-way function.
2. The hash is checked against The Tower's database.
3. If matched, the timestamp is verified against the Bitcoin blockchain.
4. Anyone can independently verify — no access to The Tower needed.