The Fair Credit Reporting Act requires Consumer Reporting Agencies to do two things that are fundamentally at odds with the idea of using a blockchain: Negative

The Fair Credit Reporting Act requires Consumer Reporting Agencies to do two things that are fundamentally at odds with the idea of using a blockchain: Negative information must be removed from your record after a certain amount of time. And false or inaccurate information - which some studies suggest exists on about 25% of consumer credit reports - must be removed or amended upon request. Both of these are Good Things. One of the most important things our legal system provides is opportunities for remediation when something goes wrong.