In The Unicode Standard, Osage script implementation is discussed in Chapter 20 Americas.
The Osage script was encoded in The Unicode Standard version 9.0. The script is now encoded in the following block:
|Blocks||Character Range||Added in Unicode Version||Unicode chart|
At one point there was an intention for the script to be unified with Latin. However, at UTC #140 the decision was made to encode it as a separate script ( L2/14-177).
A number of proposals for its inclusion have been submitted to the Unicode Technical Committee and WG2: