Taylor Swift has said talent manager Scooter Braun has sold her master recordings to a private equity firm and would not enter negotiations with her unless she signed an "ironclad" non-disclosure agreement.

The pop superstar has been embroiled in a very public and bitter row with the high-profile music executive since he bought her back catalogue last year.

She provided an update yesterday in a lengthy note on social media, saying Braun sold the rights to her first six albums to a third party.

Reports in the US suggested the deal was worth more than $300m.

Braun bought the Big Machine record label in 2019 after Swift left the label in 2018 for a new deal with Universal Music Group

Swift said Braun's team wanted her to sign an "ironclad NDA stating I would never say another word" about him "unless it was positive".

She added: "So I would have to sign a document that would silence me forever before I could even have a chance to bid on my own work.

"My legal team said that this is absolutely NOT normal, and they've never seen an NDA like this presented unless it was to silence an assault accuser by paying them off."

She said they would "not even quote my team a price" and "these master recordings were not for sale to me".

Swift, a ten-time Grammy winner, said a private equity firm called Shamrock Holdings had bought "100% of my music, videos and album art" from Braun.

Swift said the company told her Braun had insisted they make no contact with her before the sale was final or the deal would be off.

The singer said the terms of the deal mean Braun will "continue to profit off my old musical catalogue for many years" and his involvement means she will not forge a partnership with Shamrock Holdings.

The 30-year-old confirmed she has begun the process of re-recording her old music, saying "it has already proven to be both exciting and creatively fulfilling".

Braun's clients include Justin Bieber and Ariana Grande. He did not immediately respond to a request for comment.