Each Proof Posit is a dated, numbered measurement of Robinhood Chain, sealed before publication: signed by two hardware witnesses and anchored in Bitcoin. Each is free to read, and each has its own verification page.
Turn a case to see the Posit behind its certificate. Where a Posit has a Full Proof, the complete method behind it, the case links to it.
The sealed certificate in its glass case. Front: certificate JFD-20260929-CERT-00001, as sealed. Back: the Proof Posit it certifies, JFD-20260929-PP-00001, with its fingerprint and Bitcoin anchor.
The sealed certificate in its glass case. Front: certificate JFD-20261006-CERT-00001, as sealed. Back: the Proof Posit it certifies, JFD-20261006-PP-00001, with its fingerprint and Bitcoin anchor.
The sealed certificate in its glass case. Front: certificate JFD-20260929-CERT-00002, as sealed. Back: the Proof Posit it certifies, JFD-20260929-PP-00002, with its fingerprint and Bitcoin anchor.
The sealed certificate in its glass case. Front: certificate JFD-20260929-CERT-00003, as sealed. Back: the Proof Posit it certifies, JFD-20260929-PP-00003, with its fingerprint and Bitcoin anchor.
The sealed certificate in its glass case. Front: certificate JFD-20261005-CERT-00001, as sealed. Back: the Proof Posit it certifies, JFD-20261005-PP-00001, with its fingerprint and Bitcoin anchor.