The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 2025
Filed:
May. 12, 2021
Nchain Licensing Ag, Zug, CH;
Alessio Pagani, London, GB;
Craig Steven Wright, London, GB;
nChain Licensing AG, Zug, CH;
Abstract
A method of using a tree structure overlaid on a blockchain, wherein each node of the tree is a different transaction. The method comprises: inspecting the blockchain to identify at least part of the tree structure, including identifying a target child node which includes a record of a file in the respective payload of that node, and identifying a path comprising one or more edges back through the tree structure from the target child node to the root node. The method then comprises: A) for each edge along the identified path from target child node back to root node, checking that the respective child node is signed by a key associated with the respective parent node, and B) checking that a current instance of the file matches the record included in the target child node. The current instance of the file is verified at least on condition of these checks.