Reading https://uport.me/library/pdf/whitepaper.pdf it states :
The uPort Registry Contract acts as a logically centralized but physically decentralized registry or lookup table mapping each uPort identitifier to an IPFS hash linking to a structure containing the user’s attributes, profile data and attestations (see below for more information on attestations).
From this statement are my interpretation correct :
The Registry contract is physically decentralized as it exists all ethereum mining node within their blockchain ?
The Registry contract is logically centralized as all logic is contained within a centralized location ?