For the big birthdays.
The 40th, the 50th, the 90th.
Most birthday cards end up in a drawer. For the big ones, write a line that stays put.
It’s engraved on Bitcoin with the date, and comes with a certificate to frame and a link the whole family can open. It’s a good gift for someone who doesn’t need more stuff.
“Happy 50th, Dad. Fifty years of bad jokes and good advice. Love, all of us.”
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, and theirs in “In honor of”.
Ways to give it.
You sign the certificate with the name on your card; their name goes in “In honor of”. The line itself can say it’s from everyone.
From the whole family
One of you orders and signs; the line speaks for all of you. Share the link in the family chat.
“Happy 60th, Mom. From all five of us, with love and very loud singing.”
A surprise at the party
Print the certificate, frame it, and hand it over with the cake. The link opens on everyone’s phone.
“Jen at 40: still first on the dance floor, still our favorite. — the gang”
When you can’t be there
Send the link with a note. They can print the certificate themselves, any time.
“Happy 70th, Grandpa. We’re far away, but you’re always close. — Lily”
Lines you might write.
“Mom, 70 today. Still the best cook and the worst driver we know.”
“Happy 40th, Jen. Still first on the dance floor. Love, the gang.”
How it’s kept.
01Write one line
Up to 80 plain letters, about one sentence. Put the birthday in it, like “Happy 50th, Dad,” and sign it from whoever it’s from.
02Bitcoin dates it
About every ten minutes Bitcoin adds a block, stamped with the time. Your line usually goes into the next one, and stays there.
03Frame it, share it
Print the certificate for the card or the party, and send the link around. The transaction ID opens your line on a public Bitcoin explorer.
- 10:09
- 10:21
- 10:31Your line
- 10:42
- 10:50
The line is public. Full names aren’t.
Anyone can read the line, for good, so first names and “Dad” work best. The full names on your certificate aren’t on Bitcoin or the public page: only people you share your private link with see them.
Public anyone can see it
Milestone Birthday
“Happy 50th, Dad. Fifty years of bad jokes and good advice. Love, all of us.”
These words go on Bitcoin, for good.
Private only via your link
- Signed byKate Morgan
- In honor ofTom Morgan
- Emailkate@example.com
What it proves, and what it isn’t.
It proves
- These words were written by that date
- Nobody has changed a letter since
- They don’t depend on us, or any website, staying around
What it isn’t
- A physical gift: the certificate is a PDF you print
- Private: anyone can read the words
If you’re giving it in person, print the certificate and bring it along.
Good to know.
Yes. For now the certificate is signed with the name on the card that pays. Forward the private link from your order email, or print the certificate and give it in person.
Whenever you like. The date on Bitcoin is the day you engrave it, so put the birthday in the words if it matters: “Happy 50th, Dad.”
Sign it in the words, like “Love, all of us.” One person orders and pays, and everyone can open the link.
No. Once it’s on Bitcoin nobody can change it or take it out, us included. Read it twice before you pay.
$49, paid once by card, everything included, Bitcoin’s fee too. You get a link to share and a certificate to print and frame.
Make this one last.
Write the line, pay by card. It usually goes into Bitcoin’s next block, about ten minutes later.
Coming soon