Lost Media Archive
The Life and Times of Juniper Lee is an American animated television series, created by former MTV reality star Judd Winick for Cartoon Network. The show was produced by Cartoon Network Studios and aired from 2005 to 2007.
The cartoon has been aired on Cartoon Network Turkey under the name Juniper Lee'nin Maceraları. Recordings of it are quite rare, though some promos and bumpers are found on YouTube.
Coming Up Now bumper for Check it 1.0 era
https://www.youtube.com/watch?v=jKh4NV5StD4 (at 2:20)
Promo for Arrow era
https://www.youtube.com/watch?v=7ZHF0WwFAv8 (at 0:00)

Update (October 11, 2020): The footage of the first episode has been found!

Link: https://tarzantr.web.tv/video/juniper-leenin-maceralari-1-bolum-bu-senin-partin-tam-bolum-cartoon-network-turkiye__dxbaw07kh9s