Verify a transaction is included in a block — locally — with a merkle proof. ElectrumX supplies only the
merkle branch; this tab folds it with the txid and checks the reconstructed root equals the block header's
merkleRoot. The server can't fake inclusion. home · explorer
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The branch comes from blockchain.transaction.get_merkle; the header from blockchain.block.header,
both over the WebTorrent-less Electrum bridge. Folding + double-SHA256 are the node's own. Find a txid+height in the
explorer. Proven in test-spv.mjs. (Bitmark PoW is multi-algo, so this proves
inclusion under the header chain; difficulty is delegated.)