Tracing flow of tagged funds on a blockchain

A method of tracing flow of tagged funds on a blockchain, the method comprising:

• obtaining, by a blockchain network participant, at least a portion of a blockchain ledger representing a global transaction history of funds on the blockchain;
• receiving, at a transmitter, an identifier of funds on the blockchain ledger
• replaying the identifier of funds against the global transaction history to yield a spending history of the identifier of funds;
• receiving, at the transmitter, a tagging profile, the tagging profile including a set of tagged transaction outputs on the blockchain ledger and weight values associated therewith;
• replaying the tagging profile against the global transaction history to yield a propagation profile, the propagation profile including transaction outputs and weight values associated therewith derived from the tagging profile;
• determining whether the spending history of the identifier of funds satisfies an intersection condition with respect to the propagation profile;
• blocking a requested transaction if the intersection condition is satisfied;
• and
• issuing a new transaction to return funds associated with the requested transaction to a sender of funds upon the intersection condition being satisfied.

A method of tracing flow of tagged funds on a blockchain, the method comprising:

• obtaining, by a blockchain network participant, at least a portion of a blockchain ledger representing a global transaction history of funds on the blockchain;
• receiving, at a transmitter, an identifier of funds on the blockchain ledger and a tagging profile including a set of tagged transaction outputs on the blockchain ledger and weight values associated therewith pursuant to a request from the blockchain network participant, wherein each of the weight values is indicative of an amount of the funds included in a corresponding one of the set of tagged transaction outputs;
• ascertaining a spending history of the identifier of funds and a propagation profile;
• determining whether the spending history of the identifier of funds satisfies an intersection condition with respect to the propagation profile;
• blocking a requested transaction if the intersection condition is satisfied;
• and
• issuing a new transaction to return funds associated with the requested transaction upon the intersection condition being satisfied.