Start with the correct network
A hash is a transaction identifier. Use an explorer for the blockchain involved and compare the network with the receipt or wallet record. A transfer on one network should not be interpreted through an unrelated explorer.
Separate the record from the story
Transaction data can show addresses, value and status. An on-chain record does not by itself prove who controls an address, what someone promised, or whether a transfer was authorized. Those questions require additional evidence.
Check execution and token details
On Ethereum, a transaction may interact with a contract rather than make a simple payment. Read execution status and relevant token-transfer details. A submitted transaction and a successfully executed transfer are not interchangeable descriptions.
Keep the identifier with its context
Save the hash alongside the network, date, amount, asset and original payment instructions. This makes the record easier to connect with messages and receipts. A useful identifier supports analysis; it is not a mechanism for reversing a transfer.