Your smoked hide looks great. Good even smoking across the hide. Will make some good leggings or quiver.
I am curious about the Osage chips for tanning a hide. Oak bark, Hemlock bark and Sumac bark are traditional tanning methods due to the "tannin" in the bark. I have not searched the Osage, but I would suspect if any "tannin" was in Osage it is strongest in the bark and not the chips. Otherwise it is only a good "stain" with no "tanning" values. Again, I have not researched the Osage, just know of traditional methods most use. You can order a "Quebraco bark" tanning powder from Van Dykes that is not too pricey. It is a natural bark with tannin. I have used it and it works well and is easier than pounding bark into small pieces. Good luck, I'm interested in the Osage results.