Today, we wrapped up the week 5 study group session of the Bitcoin CLI live cohort. ⚡ This week, participants took a deeper dive into Bitcoin Script by exploring Pay-to-Script-Hash (P2SH) transactions and script-based timelocks. The cohort learned how P2SH makes it possible to embed more complex spending conditions into Bitcoin transactions, including multisignature and SegWit scripts. They also explored how timelock opcodes like CheckLockTimeVerify (CLTV) and CheckSequenceVerify (CSV) can be used to control when bitcoin can be spent, enabling more advanced and flexible transaction workflows. Through hands-on technical exercises, partner discussions, and collaborative learning, participants gained practical experience writing and working with these more advanced Bitcoin scripting features.

Today, we wrapped up the week 6 study group session of the Mastering Bitcoin live cohort. ⚡ This week, participants explored the blockchain and mining & consensus. The cohort examined how blocks are linked together to form Bitcoin's immutable ledger, how miners validate transactions and secure the network through proof of work, and how consensus allows thousands of independent nodes to agree on a single version of the blockchain without relying on a central authority. As always, participants met with their study partners ahead of the session to discuss the readings before coming together to share insights, ask questions, and unpack these concepts during the group study.

We've just wrapped up the week 4 study group session of the Bitcoin CLI live cohort. ⚡ This week, participants explored more advanced ways of building Bitcoin transactions by working with timelocks and OP_RETURN, learning how transactions can be scheduled for future execution or used to store small amounts of data on the blockchain. The cohort also took its first deep dive into Bitcoin Script, the scripting language that powers Bitcoin's spending conditions. Participants learned how scripts are used to authorize transactions, explored common script types like P2PKH and P2WPKH, and began writing and testing their own scripts to better understand how Bitcoin transactions are validated. As always, the week combined hands-on technical exercises, partner discussions, and collaborative learning, giving participants the opportunity to apply what they learned and deepen their understanding together.