Fig 1.
An overview of the proposed solution.
Table 1.
Summary of comparative analysis: Existing vs proposed solution.
Fig 2.
Research context: Web3 and blockchain systems.
Fig 3.
Overviewing steps of the research method.
Fig 4.
Architectural components view of solution.
Fig 5.
An examination test process for the certification and decentralization.
Fig 6.
Smart contract deployed and tested.
Table 2.
Descriptive statistics for certificate generation and blockchain recording.
Fig 7.
Executed smart contract of metaverse certificate test to save the record.
Fig 8.
Real certificate generated.
Fig 9.
Metaverse visual example as a question for test.
Fig 10.
The block size and transaction count are determining factors affecting gas consumption.
Fig 11.
Execution time for saving grades and generating certificates on the blockchain ledger.
Fig 12.
CPU usage during cryptographic and ledger operations over multiple executions.