I am a little late to the party. But from my online research, PicRights.com shares the street address as Masterfile:
3 Concorde Gate, 4th Floor
Toronto, ON, Canada M3C 3N7
The PicRights website claims that Masterfile, AFP, SciencePhotoLibrary, Loupe Images, Cephas Picture Library, PA Images, Aurora Photos, Jill Greenberg, CartoonStock, and the Associated Press are "clients".
It also lists this business address in Switzerland:
PicRights Europe GmbH
Albisstrasse 14
8134 Adliswil Switzerland
Given the fact that Masterfile has had their Toronto street address for many years, it appears to me that PicRights is leveraging Masterfile's prior and existing office and operations infrastructure for their copyright enforcement letters. It is unclear to me which was created first, PicRights Switzerland or PicRights Canada. Regardless, they appear to be working symbiotically with the Masterfile operation.
Along with PicRights.com, ArtistDefense.com also shares Masterfile's street address.
In addition to sharing the street address, what they have in common are the names of the worker bees like "Geoff Beal" who previously operated as "Geoffrey Beal" years ago. A familiar name "Michael Hilsheimer" who I remember was with Masterfile years ago now works for PicRights.com.
Has anyone dealt with PicRights.com?