6:11 AM PT -- We're told Jaidyn Alexis is signed to BuVision for a single through a joint venture with Columbia Records ... in other words, expect her biggest record yet.

Blueface's fiancée Jaidyn Alexis is now in a position to make her own splash in the music biz ... inking a record deal.

The newly engaged couple popped champagne Tuesday and toasted the immediate future -- Jaidyn signed a deal with Columbia Records.

The rookie rapper signed several pages of contracts with Blue by her side. A rep for the label also confirmed with TMZ Hip Hop the move was no publicity stunt.

Jaidyn just started hitting the booth this year but has remained dedicated to the craft.

Following BF's Vegas arrest last year, Jaidyn bailed him out and was ordered straight to the studio to get her skills up.

Her last string of music videos have amassed several million views each ... just the type of motion a record label like Columbia is looking for in this social media era.

BF's other baby mom, Chrisean Rock has been making waves herself on the indie circuit, most notably with her viral "Mr. Take Ya B*tch" collab with Lil Mabu.

Congrats to Jaidyn.