Abstract: A method of modifying a data block of a data structure comprising a plurality of linked data blocks comprising: receiving a selection of said a data block comprising block data; creating modified block data; transmitting a request to a plurality of validator devices over a network, the request comprising a modification record and requesting permission to modify the data block in accordance with the modified block data; determining that consensus is reached by the plurality of validator devices that the data block can be modified in accordance with the modified block data; in response to the determining: modifying the data block in accordance with the modified block data; and adding a modification data block to the data structure, the modification data block comprising: the modification record and a cryptographic hash of a data block that precedes the modification data block after addition of the modification data block to the data structure.

Abstract: A method of maintaining a data structure comprising: creating a data block; transmitting a message to validator devices requesting permission to add said data block to the data structure; determining that consensus is reached, and in response: forming a first sub-chain in the data-structure by adding the data block to the data structure, the first sub-chain starting with a genesis block and ending with said data block, wherein the data block comprises a block number indicating the number of blocks in the data structure from the genesis block, and creating a further data block; transmitting a further message to the validator devices requesting permission to add said further data block to the data structure; determining that consensus is reached, and in response, forming a second sub-chain by adding the further data block to the data structure after said data block, the second sub-chain starting with said further data block.

Abstract: A method of maintaining a data structure comprising: creating a data block; transmitting a message to validator devices requesting permission to add said data block to the data structure; determining that consensus is reached, and in response: forming a first sub-chain in the data-structure by adding the data block to the data structure, the first sub-chain starting with a genesis block and ending with said data block, wherein the data block comprises a block number indicating the number of blocks in the data structure from the genesis block, and creating a further data block; transmitting a further message to the validator devices requesting permission to add said further data block to the data structure; determining that consensus is reached, and in response, forming a second sub-chain by adding the further data block to the data structure after said data block, the second sub-chain starting with said further data block.

Abstract: Some embodiments of the present disclosure relate to a computer implemented method of storing data associated with an asset on a blockchain. Other embodiments relate to a computer implemented method of retrieving data associated with an asset that is stored on a blockchain. The methods are performed on a blockchain node of a blockchain network.

Abstract: A method of modifying a data block of a data structure comprising a plurality of linked data blocks comprising: receiving a selection of said data block comprising block data; creating modified block data; transmitting a request to a plurality of validator devices over a network, said request comprising a modification record and requesting permission to modify said data block in accordance with the modified block data; determining that consensus is reached by the plurality of validator devices that said data block can be modified in accordance with the modified block data; in response to said determining: modifying said data block in accordance with the modified block data; and adding a modification data block to the data structure, the modification data block comprising: the modification record and a cryptographic hash of a data block that precedes the modification data block after addition of the modification data block to the data structure.

Abstract: A method of maintaining a data structure comprising: creating a data block; transmitting a message to validator devices requesting permission to add said data block to the data structure; determining that consensus is reached, and in response: forming a first sub-chain in the data-structure by adding the data block to the data structure, the first sub-chain starting with a genesis block and ending with said data block, wherein the data block comprises a block number indicating the number of blocks in the data structure from the genesis block, and creating a further data block; transmitting a further message to the validator devices requesting permission to add said further data block to the data structure; determining that consensus is reached, and in response, forming a second sub-chain by adding the further data block to the data structure after said data block, the second sub-chain starting with said further data block.

Abstract: A method of modifying a data block of a data structure comprising a plurality of linked data blocks comprising: receiving a selection of said data block comprising block data; creating modified block data; transmitting a request to a plurality of validator devices over a network, said request comprising a modification record and requesting permission to modify said data block in accordance with the modified block data; determining that consensus is reached by the plurality of validator devices that said data block can be modified in accordance with the modified block data; in response to said determining: modifying said data block in accordance with the modified block data; and adding a modification data block to the data structure, the modification data block comprising: the modification record and a cryptographic hash of a data block that precedes the modification data block after addition of the modification data block to the data structure.

Abstract: A method of maintaining a data structure comprising: creating a data block; transmitting a message to validator devices requesting permission to add said data block to the data structure; determining that consensus is reached, and in response: forming a first sub-chain in the data-structure by adding the data block to the data structure, the first sub-chain starting with a genesis block and ending with said data block, wherein the data block comprises a block number indicating the number of blocks in the data structure from the genesis block, and creating a further data block; transmitting a further message to the validator devices requesting permission to add said further data block to the data structure; determining that consensus is reached, and in response, forming a second sub-chain by adding the further data block to the data structure after said data block, the second sub-chain starting with said further data block.