coinbase-transaction

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Event July 6, 2012 Added September 8, 2026 Updated September 8, 2026 BIP (Bitcoin Improvement Proposal)

BIP 34 — Block v2, Height in Coinbase

Gavin Andresen

Embeds the block height in each coinbase transaction's scriptSig and raises block version to 2, activated once 95% of the last 1,000 blocks signal support, enforcing coinbase uniqueness.