Time Record Card

Proof of a moment

Scratch it. Register it. It's permanent.

A Time Record Card is a physical card with a hidden code. The instant you register that code, this service creates a timestamped record — hashed, batched, and anchored into the Bitcoin blockchain via OpenTimestamps — that anyone can verify independently, forever, whether or not this site is still running.

Have a card?

Scratch off the panel and enter the 12-character code below.

No zeros, ones, O, I, L, or U.

How it works

  1. Register. Enter your card's code once. That moment is timestamped to the millisecond.
  2. Hash. The record is folded into a Merkle tree with other registrations from the same hour.
  3. Anchor. The tree's root is stamped into the Bitcoin blockchain via OpenTimestamps — a proof no single party, including us, can forge or backdate.
  4. Verify. Anyone, anytime, with nothing but open tools and the public record, can confirm it. See how to verify.