The website Bitcoin.org is believed to have been hacked as users have detected it promoting Bitcoin giveaways.

Users first reported about the dubious activities on the morning of 23 September, as the website's homepage displayed a pop-up asking to send Bitcoins to a dedicated address with promises they would receive double the amount in return.

"The Bitcoin foundation is giving back to the community! We want to support our users who have helped us along the years. Send Bitcoin to this address, and we will send double the amount in return", the message with an attached QR code reads.

The direct URL for Bitcoin.org is not working as of now. Domain hosting site Namecheap said on Twitter it has temporarily disabled the Bitcoin.org domain because of the alleged hack.

Registered in 2008, Bitcoin.org is now the oldest education resource website dedicated to the cryptocurrency.