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A sidechain is a designation for a blockchain ledger that runs in parallel to a primary blockchain. Entries from the primary blockchain can be linked to and from the sidechain; this allows the sidechain to otherwise operate independently of the primary blockchain (e.g., by using an alternate means of record keeping).
- "The Sidechains Breakthrough Almost Everyone in Bitcoin Missed". CoinDesk. 17 Jan 2018. Retrieved 8 Mar 2018.