Prepare the chicken thighs by trimming any excess fat and placing them in the slow cooker.
In a bowl, combine the orange juice, soy sauce, honey, rice vinegar, garlic, and ginger. Mix well until smooth.
Pour the mixture over the chicken in the slow cooker, ensuring all pieces are coated.
Cover and cook on low for 6-8 hours or on high for 3-4 hours, until the chicken is tender and easily pulls apart.
Once cooked, carefully remove the chicken from the slow cooker and shred it with two forks.
In a small bowl, mix the cornstarch with a tablespoon of water to create a slurry, Then stir it into the sauce in the slow cooker.
Return the shredded chicken to the slow cooker and stir to coat in the thickened sauce. Let it cook on high for an additional 15-20 minutes.
Serve the orange chicken over rice or with steamed vegetables and garnish with sesame seeds and chopped green onions.