No it didn't. That's a lie you tell yourself to comfort you in your effort to believe what you wish to believe. There were five northern states that continued slavery during the war, and even several of the officially "free" states continued having slavery within their borders.
And this says nothing of Illinois where it was legal to grab free blacks and "sell them down the river".
You also ignore the large northern support for the Corwin Amendment, which could not possibly have passed both the house and Senate without support from the Northern states. This amendment would guarantee the USA would remain a slave nation indefinitely.
Sell it to someone more gullible.
The Corwin Amendment was never ratified stupid. Tell yourself another lie.