S. Rept. 116-177: Blockchain Promotion Act of 2019, Report to Accompany S. 553, Including Cost Estimate of the Congressional Budget Office, December 17, 2019 [open pdf - 441KB]
From the Purpose of the Bill: "The purpose of S. 553, the Blockchain Promotion Act of 2019, is to direct the Secretary of Commerce to establish an interagency working group to recommend to Congress a definition of blockchain technology and to make recommendations for additional interagency studies related to blockchain technology."
S. Rept. 116-177; Senate Report 116-177
U.S. Government Publishing Office: http://www.gpo.gov/