A method for securing an interblockchain transaction, the interblockchain transaction involving a first transfer on a permissioned blockchain and a second transfer on a permissionless public blockchain, the method comprising: performing, by a permissioned blockchain processing circuitry: receiving, from a first user application, a registration request including a first permissioned blockchain public key and a first permissionless blockchain public key, the first permissioned blockchain public key being valid on the permissioned blockchain and the first permissionless blockchain public key being valid on the permissionless public blockchain; receiving, from a second user application, a second registration request including a second permissioned blockchain public key and a second permissionless blockchain public key, the second permissioned blockchain public key being valid on the permissioned blockchain and the second permissionless blockchain public key being valid on the permissionless public blockchain; receiving, from the first user application, a transaction identification, the transaction identification identifying a first transfer transaction executed on the permissionless public blockchain, the transaction identification identifying the first and second permissionless blockchain public keys; verifying, using the transaction identification, completion of the first transfer transaction; and in response to verifying the completion of the first transfer transaction, carrying out a second transfer transaction on the permissioned blockchain, the second transfer transaction involving a transfer from the second permissioned blockchain public key to the first permissioned blockchain public key, wherein the second transfer transaction is a transfer, from the second permissioned blockchain public key to the first permissioned blockchain public key, of a token representing a share of a collectable, the method further comprising registering the collectable with the permissioned blockchain, wherein registering the collectable with the permissioned blockchain includes generating a unique ID that uniquely identifies the collectable on the permissioned blockchain, pairing a unique object fingerprint to the unique ID, and storing the unique ID and the unique object fingerprint to the permissioned blockchain, wherein the registration request received from the first user application includes a biometric commitment. receiving, from a first user application, a registration request including a first permissioned blockchain public key and a first permissionless blockchain public key, the first permissioned blockchain public key being valid on the permissioned blockchain and the first permissionless blockchain public key being valid on the permissionless public blockchain; receiving, from a second user application, a second registration request including a second permissioned blockchain public key and a second permissionless blockchain public key, the second permissioned blockchain public key being valid on the permissioned blockchain and the second permissionless blockchain public key being valid on the permissionless public blockchain; receiving, from the first user application, a transaction identification, the transaction identification identifying a first transfer transaction executed on the permissionless public blockchain, the transaction identification identifying the first and second permissionless blockchain public keys; verifying, using the transaction identification, completion of the first transfer transaction; and in response to verifying the completion of the first transfer transaction, carrying out a second transfer transaction on the permissioned blockchain, the second transfer transaction involving a transfer from the second permissioned blockchain public key to the first permissioned blockchain public key, wherein the second transfer transaction is a transfer, from the second permissioned blockchain public key to the first permissioned blockchain public key, of a token representing a share of a collectable, the method further comprising registering the collectable with the permissioned blockchain, wherein registering the collectable with the permissioned blockchain includes generating a unique ID that uniquely identifies the collectable on the permissioned blockchain, pairing a unique object fingerprint to the unique ID, and storing the unique ID and the unique object fingerprint to the permissioned blockchain, wherein the registration request received from the first user application includes a biometric commitment.