I read in this great thread that which BIP are standards is not always obvious. What about BIP 65? To which extent is it standard?

Currently, all I know is that "Miners following the developers of the "Core" Bitcoin client have been adopting BIP-65, with approximately 25% of the last found blocks claiming to be ready for the soft fork on the version string in the block header. " ... not very precise.


  • 1
    I updated the thread you linked to, since it only contained information up to 0.10. Commented Aug 24, 2016 at 16:09

1 Answer 1


The softfork defined by BIP 65 activated in december 2015. This means that the whole network enforces the new rules proposed by BIP 65, and it is safe to use CLTV opcodes in scripts since then.

  • 1
    hey @Pieter, BIP65 also includes a section called "Replace nLockTime entirely", has this been enforced as well? is nLockTime now deprecated?
    – knocte
    Commented Jan 10, 2017 at 3:01
  • 1
    That section is under motivation, and explains one of the things that become possible to do (with more changes) due to the BIP65 rules. It does not describe BIP65 itself. Commented Jan 10, 2017 at 3:09

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.