_____ ____  _   _ _____ ____ _____  _    __  __ ____
|_   _|  _ \| | | | ____/ ___|_   _|/ \  |  \/  |  _ \
  | | | |_) | | | |  _| \___ \ | | / _ \ | |\/| | |_) |
  | | |  _ <| |_| | |___ ___) || |/ ___ \| |  | |  __/
  |_| |_| \_\\___/|_____|____/ |_/_/   \_\_|  |_|_|


Cryptographic timestamping, from the terminal.


Install (macOS or Linux; amd64 or arm64):

    curl -fsSL https://get.truestamp.com/install.sh | sh

Pin a specific version:

    curl -fsSL https://get.truestamp.com/install.sh | TRUESTAMP_VERSION=vX.Y.Z sh

Install to a custom directory:

    curl -fsSL https://get.truestamp.com/install.sh | TRUESTAMP_INSTALL_DIR=~/bin sh

Upgrade:

    truestamp upgrade

    Once installed, `truestamp upgrade` is install-method aware. For
    install.sh / manual installs it downloads the latest release,
    verifies SHA-256 (and cosign if present), and atomically replaces
    the binary in place. For Homebrew / `go install` it prints the
    right `brew upgrade` / `go install @latest` command to run.

    `truestamp upgrade --check` exits 0 up-to-date, 1 if an upgrade is
    available, 2 on network error, 3 if the latest release is a
    pre-release (won't auto-install; pass `--version` to opt in).

    Other commands print a once-per-day "new version available" notice
    on stderr. Suppress with `--no-upgrade-check` or
    `TRUESTAMP_NO_UPGRADE_CHECK=1`, or in CI (auto-detected).

    Re-running `curl ... | sh` also works.


Signature verification (macOS and Linux):

    install.sh verifies the SHA-256 checksum of every download. If
    cosign is on your PATH, it will additionally verify the cosign
    signature of the checksums file (keyless, via Sigstore). When cosign
    is not installed this step is skipped silently.

    Install cosign:

        brew install cosign

    Require cosign verification (refuse to install without it):

        curl -fsSL https://get.truestamp.com/install.sh | TRUESTAMP_REQUIRE_COSIGN=1 sh


Other install channels:

    Homebrew    brew install truestamp/tap/truestamp-cli
    Go install  go install github.com/truestamp/truestamp-cli/cmd/truestamp@latest


Source      github.com/truestamp/truestamp-cli
Releases    github.com/truestamp/truestamp-cli/releases
Script      get.truestamp.com/install.sh
License     MIT


Copyright (c) 2021-2026 Truestamp, Inc. All rights reserved.