This document describes concepts and considerations on the use of trust anchors for systems leveraging blockchain and distributed ledger technologies (DLTs) for identity management, i.e. the mechanism by which one or more entities can create, be given, modify, use and revoke a set of identity attributes.

More details can also be found here: https://www.iso.org/obp/ui/en/#iso:std:iso:tr:23644:ed-1:v1:en