Exhibit 31.2
CERTIFICATION
 
I, Robby Chang, certify that:
 
1. I have reviewed this Annual Report on Form 10-K/A of Riot Blockchain, Inc.;
 
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
 
  
 
/s/ Robby Chang
 
 
Chief Financial Officer
(Principal Financial Officer)
 
Date: June 29, 2018