Indestructible Data: How Arbitrary Data is Added to the Blockchain
Channel: chaintuts
Date: 2020-03-13

It's not just value transfers - Bitcoin and major Bitcoin forks can store arbitrary data, creating interesting use cases! Learn about scripts & OP_RETURN.

Two minor corrections: OP_RETURN doesn't return true, but rather immediately marks the tx as provably unspendable. It is still a valid tx. As well, BCH has an OP_RETURN limit of 220 bytes, not 80.