Natural history collections are estimated to hold more than 2.5 billion specimens worldwide, a major proportion of which is owned by CETAF organisations. Being the only physical evidence of the past occurrence of organisms in space and time and therefore a tremendously important fundament for biodiversity research, it is crucial that biological collection objects can be consistently referenced with globally unique and stable identifiers. Ideally, such as system has a mechanism for resolving identifiers so that Users and software systems are automatically redirected to images, websites or metadata for the specimens of interest. ...