Simple, honest pricing

Live now: Free — 0 sats. Stamp & verify with OpenTimestamps. No account, no Lightning invoice.

Future (planned): Pay-per-stamp 21 sats (optional Lightning tip-through-us, covers product costs; proof still OTS on Bitcoin). Pro pack 2,100 sats (bulk stamps / API-friendly).

Chain: Bitcoin only (via OpenTimestamps).

Stamp free now