I have been sent Bitcoin but although the TX shows up on bitcoinexplorer and BscScan I have been informed that the Transaction Hash is fake.
You must be able to differentiate Bitcoin and Wrapped Bitcoin tokens. You must know all Wrapped Bitcoin tokens are tokens, sort of altcoins, and they are not Bitcoin.
Bitcoin is on Bitcoin blockchain and you must check Bitcoin transaction hash with Bitcoin Block explorers.
Wrapped Bitcoin tokens can be on many altcoin blockchains like Ethereum ERC20, Binance Smart Chain BEP20, Solana and more chains. You must check transaction hash of Wrapped Bitcoin token on altcoin block explorers.
List of Bitcoin block explorersWrapped tokens (Coingecko.com).
Wrapped tokens (Coinmarketcap.com).