Notary system for a distributed ledger

A method performed by one or more computing systems for issuing tokens for an asset, the method comprising:

• generating a token identifier of a token representing the asset, the asset having an owner;
• accessing authorization information of the owner;
• generating an issue transaction that outputs:
• the token identifier;
• the authorization information;
• a description of the asset;
• and
• an identification of an issuer of the token;
• adding to the issue transaction an issuer signature generated by the issuer;
• and
• providing the issue transaction to a notary system for notarization.

A method performed by one or more computing systems for notarizing a transaction, the method comprising:

• accessing a transaction that outputs authorization information and a token;
• storing the authorization information in association with token designator for use in determining whether a subsequent transfer transaction for transferring the token is authorized;
• and
• notarizing the transaction.

A method performed by one or more computing systems for generating a transfer transaction, the method comprising:

• access a token identifier of a static token that is output by a prior transaction, the static token being owned by a current owner;
• accessing authorization information of a new owner of the token;
• adding as an input to the transfer transaction a token designator for the static token that is output by the prior transaction;
• adding as an output to the transfer transaction the token identifier;
• and
• adding as an output to the transfer the authorization information of the new owner.

One or more computing systems for notarizing a transaction, the one or more computing systems comprising:

• one or more computer-readable storage mediums for storing computer-executable instructions for controlling the one or more computing systems to:
• access a transaction that outputs authorization information and outputs data, the authorization information for determining whether a transfer of the data is authorized;
• store the authorization information in association with a data designator that identifies the data for use in determining whether a subsequent transfer transaction for transferring the data is authorized without having to access the transaction;
• and
• notarize the transaction;
• and
• one or more processors for executing the computer-executable instructions stored in the one or more computer-readable storage mediums.

One or more computer-readable storage mediums that store a transaction, the one or more computer-readable storage mediums comprising:

• a data structure that includes:
• a first input that inputs a token designator of a static token that is output by a prior transaction, the static token being owned by a current owner;
• a first output that outputs the token designator;
• a second output that outputs authorization information of a next owner of the token
• wherein the transaction inputs the token designator only once and outputs the token designator only once.

One or more computing systems coordinate notarization of a transfer transaction, the one or more computing systems comprising:

• one or more computer-readable storage mediums for storing computer-executable instructions for controlling the one or more computing systems to:
• under control of a first system:
• access a transfer transaction that:
• inputs a token identifier of a static token that is owned by a current owner;
• outputs authorization information of a new owner of the static token;
• and
• outputs the token identifier;
• send to a notary system the transfer transaction;
• and
• receive from the notary system the notarized transfer transaction;
• and
• under control of the notary system,
• receive from the first system the transfer transaction;
• determine whether the transfer transaction is authorized using prior authorization information stored by the notary system when a prior transaction that output the token identifier was notarized;
• store the authorization information of the transfer transaction and a token designator of the static token;
• notarize the transfer transaction;
• and
• send to the first system the notarized transaction;
• and
• one or more processors for executing the computer-executable instructions stored in the one or more computer-readable storage mediums.