I agree with Amanda's answer, there is not particular standard yet. Here are some certificates currently available. From Blockchain Training Alliance1) Certified Blockchain Business Foundations (CBBF) 2) Certified Blockchain Solution Architect (CBSA) 3) Certified Blockchain Developer - Ethereum (CBDE) 4) BTA Certified Blockchain Developer - Hyperledger Fabric (CBDH)From CryptoCurrency Certification Consortium1) Certified Bitcoin Professional (CBP) 2) Certified Bitcoin Expert (CBX)From Coursera1) IBM Blockchain Foundation for Developers
Blockchain certifications are not a standard yet but soon you will start seeing some certifications launched by companies.