BLOCK

Memory on Bitcoin.

collapse + firsts + as-of

Everyone thinks Bitcoin is money. We date memory on the timechain — so a past cannot be edited by a platform, a PDF, or a model.

Spark — hash a file or textVerify a hash

Save to a public moment — pending until a real Bitcoin height. The tip is never your height.

Not a truth claim. We do not hold keys.
A date is a caption. A first height is a fact.