block
Looking up this block in the vault…
This block isn't in the vault.
The link may be incomplete, or the block was withdrawn.
proof
Checked in your browser, just now.
These are the 80 bytes the chip hashed. Your browser hashed them again with SHA-256, twice, and compared the result with the vault's record.
- read the 80-byte header
- SHA-256, twice
- compare with the hash in the vault
PASS
Do not take this page's word for it. The same check, on your machine:
record
The record
The full record, byte for byte
block-coin
Hold this block in your hand.
$39US shipping included
A 3D-printed coin with an NFC chip inside, printed to order in the USA. Tap it with any phone and this page opens, re-verifying the proof in front of whoever is holding it. Clay orange, copper, or ink black, chosen at checkout.
Typically in the mail within ten business days. Made to order; see the terms.
Or keep it on paper.
One clean page, US Letter or A4: the plate as it stands above, when it was struck, and how anyone can check it. Print it, or save it as a PDF.
your-line
Strike your own.
One line, up to 90 characters, mined by the same chip into a block like this one. From $6.99.