What is the differences between blue sign and green sign of MQA?

I am subscribing Tidal Hifi plan. I can see the 2 types of sign on the bottom when I am playing the same style file. Please let me know those differences.

Check this link http://bobtalks.co.uk/blog/mqa-philosophy/mqa-authentication-and-quality/
At Provenance chapter the answer to you question


Thank you very much!!