Wrong.
The proclamation declared "that all persons held as slaves" within the rebellious states "are, and henceforward shall be free."
Slavery is still legal. Read the 13th amendment you just used as proof.
...all persons held as slaves within the rebellious states are, and henceforward shall be free...
Translation: All persons held as slaves in enemy territory we don't control are free!
Okay... Boss Proclamation: "All American political prisoners held abroad are and henceforward shall be free!" Yay me... I just freed every American political prisoner in the World! Go write history books about me and build monuments to me! Put my picture on your pennies!
The north held enemy territory. You sound silly as usual.
And the EP did not apply to slaves in northern-held territory.
Yes actually it did.
The map will speak for itself. The striped areas are all under authority and control of the CSA as of Jan.1, 1863. As such, they constitute an "enemy of state at time of war" and are subject to provisions under war powers of the US. But that means absolutely nothing in terms of reality... it's merely words on a piece of paper. You cannot "free" what you have no control of. The EP can't be applied because there is no authority there to enforce it. It's equal to passing a law that Iran can't build nukes.
The IMPORTANT part is the darker areas. This is part of the Confederacy but it had already been captured and had come under control of the Union before EP. Therefore, the slave owners there are not "enemies of state" anymore, they are citizens with Constitutional rights again. You cannot take their property. THIS is also why no slaves were freed in Northern slave states.
Now... there are a few "exception" areas... the circled areas on the map are places where "slaves" were primarily used to load ships and barges. This was a very small and insignificant number of slaves who were pretty much displaced by war when the US naval forces took the ports. Same applied to the barges along the Mississippi. Most of the owners of these slaves had already abandoned them and fled for their lives.
As for what happened from there in terms of lands captured by the North... it was very a confusing and controversial period with many various things happening that we never learned about in history class. In some cases, slaves were 'liberated' and allowed to just 'go free' with the shirt on their backs... sometimes they were impressed into service of the US Army... sometimes they were shipped off to what amounted to refugee camps where most of them starved to death in 1864, as supplies of food and medicine had to be rationed... soldiers always came first.