A note to the future.
No shovel needed.
Write a line to whoever’s around in 20, 50 or 100 years: your kids, your class, your town, yourself.
One honest difference from a buried box: it isn’t sealed. Anyone can read it from the day it’s sent. What it does keep is the date, and nobody can change a word.

A certificate to keep, and a line that can’t be lost.
- A certificate to frame. A PDF for Letter, A4 or 11×14, printed at home or at any print shop.
- A page to share. One link that opens on any phone, for everyone who should see it.
- A permanent record. The line itself on Bitcoin, with its date, checkable by anyone, with or without us.
- Signed by you. The certificate carries the name on the card that pays.
Who to write it for.
The certificate is signed with the name on the card that pays. The line can speak for a whole class, team or family.
A class or a team
One person orders; share the link at the reunion, or the launch party.
“Team Lantern, 2026: we shipped it. Whoever reads this: it worked.”
Your kids, years from now
Frame it now; they’ll read it differently at 18.
“Mia & Leo, 2026: you’re 4 and 7 and think we’re funny. Stay that way.”
Your future self
Set a reminder to open the link in twenty years.
“Note to me in 2046: you were scared and did it anyway. Keep going.”
Notes to the future.
“To whoever reads this in 2126: we were here, and we were hopeful.”
“Class of 2026: we made it. Check in at the 50th, okay?”
“Dear 2050 me: did you ever learn to make Grandma's pie?”
How it’s kept.
01Write to the future
Up to 80 plain letters, about one sentence. Say who it’s for and when, like “To whoever reads this in 2076.” It’s public from day one, so write it to be read now, too.
02It joins the next block
About every ten minutes Bitcoin adds a block, stamped with the time. Your note usually goes into the next one, and that block’s time is its date.
03Open it any time
The transaction ID on your certificate opens the words on a public Bitcoin explorer. Put the certificate somewhere you’ll find it.
- 10:09
- 10:21
- 10:31Your note
- 10:42
- 10:50
Not sealed. Readable from day one.
The note is public as soon as it’s sent. Names on your certificate aren’t on Bitcoin or the public page.
Public anyone can see it
Time Capsule
“To whoever reads this in 2126: we were here, and we were hopeful.”
These words go on Bitcoin, for good.
Private only via your link
- Signed byChris Patel
- Emailchris@example.com
What it proves, and what it isn’t.
It proves
- These exact words existed by that date
- Nobody has changed a letter since
- Nobody could have backdated it
What it isn’t
- Sealed or secret until a later date
- A promise that anyone will read it, or when
If you want a note only one person can open later, this isn’t it. A sealed letter or a lawyer is.
Good to know.
No. It’s public on Bitcoin from the day it’s sent, and anyone can read it. If you need it sealed until later, this isn’t the right tool.
Nobody can promise that. Bitcoin has added blocks every day since 2009 and is copied on thousands of computers, so it doesn’t depend on any one company, us included. As long as it keeps running, the note stays put.
Keep your certificate or your order email: the transaction ID opens the note on a public Bitcoin explorer. It’s also in our public registry while we’re around.
Yes. One person orders and signs the certificate, and the link can be shared with everyone.
$49, paid once by card, everything included, Bitcoin’s fee too. You get a link to share and a certificate to print and frame.
Say something to later.
Write your note, pay by card. It usually goes into Bitcoin’s next block, about ten minutes later.
Coming soon