The Internet Society Blockchain Special Interest Group has been officially chartered and approved as part of the growing ISOC family of chapters and SIGs. Below is the text of the resolution issued on March 7, 2017 by the ISOC Board of Trustees welcoming the ISOC-BSIG:
Resolution 2017-08: Welcome new Special Interest Group
RESOLVED, that the ISOC Board of Trustees warmly welcomes the new ISOC Blockchain Special Interest Group, which was chartered and approved since the last Board meeting.
Source: http://www.internetsociety.org/who-we-are/board-trustees/list-resolutions