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Now we know why Kanye West hates Jay Z with a passion. Kanye went on a Twitter rampage, posting his contracts and urinating on his Grammy Award.

@lavidaNOTA, who calls himself The Authority, is a South African record label owner who read over the contracts that Kanye posted on Twitter.com this week.

@lavidaNOTA writes, "I have 16-years experience in the music business... It took me all night to understand Kanye's contracts. Aspiring artists have no idea what they are getting themselves into. This is why it’s important to ask people who have been through it for advice!"

Apparently, Jay Z sold the masters to Kanye's first six albums just so he could get his own masters back.

"Kanye contracts SUMMARY: Apart from the inducement which Kanye had to sign to get his advances. This shows that Jay Z sold the masters to first 6 @kanyewest's albums just so he could get his own back. He did so knowing Def Jam won't sell them back to Kanye in future. That's BEEF!"

"[Kanye] owns album[s] 7-10 but the most lucrative and most critically acclaimed albums are owned by Roc-A-Fella which is wholly owned by Def Jam... The majors will never sell you your masters because that’s what gives them market share and drives profits and Jay Z knew that."

@lavidaNOTA says Twitter CEO Jack Dorsey banning Kanye from Twitter had nothing to do with him posting a Forbes editor's phone number.

"Jack Dorsey aka @jack was jogging with Jay Z just a few weeks ago. Now Kanye is banned from tweeting for 12-24 hours. Sounds about rights!"