To "assess" what "type" of Bitcoin you're dealing with, all you need is the block headers.
Assuming you can get that, it's trivial to find competing headers if they exist, and to check the timestamps and received times of block headers.
What the chain says
- Block
- 673 185
- Time
- 2021-02-06T05:30:18Z
- Signer
- 15YXRhqbHawbH49aYzfiww2UQ4Cz82GL4t
- App
- twetch
- Type
- post
- Content type
- text/plain
- Name in tx
- twetch#622
Fields the transaction did not carry are omitted. Open the payload to see the bytes as stored.
Signed by
15YXRhqbHawbH49aYzfiww2UQ4Cz82GL4t Verified