After last October Stellar is distributing again up to 16 billion Lumens to Bitcoin holders or 16% of the initial Lumens in their distribution program.
For each Bitcoin you can claim almost 1,000 Lumens.
Example:
16,400,000 Bitcoins in existence - you own 5 Bitcoins
On June 26th stellar.org will take a snapshot of the blockchain at the first block mined - this will record the coin balances of all bitcoin accounts at that time.
On June 27th they will provide a link to a claim page, where you will need to complete this process:
Authenticate with Facebook
Enter your Stellar account ID
Verify Bitcoin account by signing a special message with your private key using your existing bitcoin wallet
If your Bitcoins are located on one of these exchanges
Kraken
BTC38
Poloniex
Deribit
Yuanbao
NaoBTC
there is no action for you to take.
The exchanges will handle the process automatically crediting your account with the appropriate amount of Lumens.
For more information you can read the Stellar blog here.
