CoinSpeakerVeriBlock ‘Spams’ Bitcoin Network to Secure Blockchains of Other CryptosOn October 22, 2013, Bitcoin Core developers merged pull request to accept OP_RETURN as a valid transaction type, providing users with 80 bytes of space for embedding arbitrary data. OP_RETURN enables users to mark transaction outputs as unspendable.VeriBlock ‘Spams’ Bitcoin Network to Secure Blockchains of Other Cryptos
