LBRYcrd
The blockchain that provides the digital content namespace for LBRY
... similar to Bitcoin. The blockchain is the foundation of the protocol stack. The most salient feature of the LBRY blockchain is the association of a normalized string of characters (a “name”) with a structured set of metadata. This coupling is called a claim. The LBRY blockchain stores names and metadata in a parallel Merkle tree, separate from the tree used to store transaction data. This allows LBRY URLs to be trustfully resolved even without a full copy of the blockchain.