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bip-322 · opentimestamps
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§ stamp · verify

verify a stamp.

Paste an envelope JSON, drop a .stamp file, or open a share link. Full verification checks the canonical message reconstructs, the BIP-322 signature verifies, and (if present) the OTS proof is well-formed. Optional: upload the content bytes to confirm the hash matches.

[01]load envelope
[02]content bytes (optional)

Upload the file the stamp covers. The verifier streams SHA-256 locally and compares against content.hash. Content never leaves this tab; bytes are not kept in memory (safe for multi-GB files).