Life & fun · alternatives · 2026

btproof is a trusted timestamping service that records information on the Bitcoin blockchain. Launched in 2013, it provides users with a way to create cryptographic proof that data existed at a specific point in time… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. btproof - trusted timestamping on the Bitcoin blockchain launched in 2013; newer entries below may have overtaken it.

1. 1
   TimeSeal▲116

   Restoring digital trust, one blockchain timestamp at a time

   2023 · timeseal.com · its alternatives →

2. 2BC
   Bitcoinproof - Create a forgery-proof timestamp for your data▲8

   2013 · vog.github.io · its alternatives →

3. 3
   Bitproof▲113

   True certification in the bitcoin blockchain

   2015 · its alternatives →

4. 4
   The Bitcoin Note – Secure, Self-Custodial Bitcoin Wallets in Cash Form▲344

   The Bitcoin Note: Physical secure Bitcoin that you can easily share, spend or hold.

   2022 · offline.cash · its alternatives →

5. 5
   Claimby▲107

   Free legally-valid timestamps for your files, ideas & art.

   2018 · claimby.com · its alternatives →

6. 6SV
   Seal – Verifiable timestamp for your private ideas▲113

   2022 · docs.planet.ink · its alternatives →

7. 7
   Bitrated – Bitcoin m-of-n arbitrated transactions▲155

   Bitcoin Trust Platform - Identity & reputation management, multi-signature smart contracts and consumer protection for Bitcoin and other cryptocurrencies.

   2013 · bitrated.com · its alternatives →

8. 8
   Btfy – a blockchain that uses weather observations▲10

   Hi HN, I built Btfy, an experimental blockchain that uses weather observations as a source of unpredictability for consensus The motivation is simple. Proof of Work generates uncertainty by performing computations. I wanted to explore whether we could obtain some of that uncertainty from the real world instead. Btfy combines weather observation data with a Verifiable Delay Function (VDF): Weather Observation Data -> VDF -> Block -> Hash Chain In the current implementation, observation data is collected from multiple locations, a VDF is computed, and the result is used to generate a block.…

   Aug 2026 · github.com · its alternatives →

9. 9
   Stampd.io - A document blockchain stamping service▲32

   Use the public blockchains to timestamp your files with indelible proof. Create non-fungible tokens (NFT) in Cardano.

   2015 · stampd.io · its alternatives →

10. 10
    Autoproof▲247

    Protect your company codebase

    2023 · autoproof.dev · its alternatives →

11. 11
    Woleet▲73

    Bitcoin-anchored proof that documents are authentic

    May 2026 · woleet.io · its alternatives →

12. 12
    TxHash Blockchain as a Service▲120

    Cryptocurrency and smart contract event notifications

    2018 · its alternatives →

13. 13
    Bitcoin-Safe Desktop Wallet (FOSS)▲66

    Free & OpenSource software for managing cold storage wallets

    Apr 2026 · bitcoin-safe.org · its alternatives →

14. 14
    TimeProof▲5

    Prove it existed. Permanently.

    Jan 2026 · its alternatives →

15. 15
    Blocknify▲71

    Sign sensitive documents without sacrificing your privacy.

    2018 · its alternatives →

16. 16
    BRD 3.0 for iPhone▲74

    The simple way to purchase and protect your cryptocurrency.

    2018 · apps.apple.com · its alternatives →

17. 17DP
    Decentralized P2P Messaging with Blockchain Verified Identities▲95

    2018 · stealthy.im · its alternatives →

18. 18
    Versiobit▲83

    Archives your files, versioned and audit-proof by Blockchain

    2023 · versiobit.com · its alternatives →

19. 19
    Blocksign, a Bitcoin service for legally signing any document▲17

    Blockchain is a wonderful record keeper that can track every transaction that happens in the string.

    2014 · blocksignit.com · its alternatives →

20. 20
    yousaidthat.org▲63

    Prove that you said things before anyone else

    Jun 2026 · yousaidthat.org · its alternatives →

21. 21
    STAMPD.IO▲5

    Use the Blockchain to timestamp files with indelible proof.

    2019 · stampd.io · its alternatives →

22. 22
    SBIX Certify▲13

    ✨ Instant legal proof-of-existence for any document.

    Dec 2025 · certify.sbix.io · its alternatives →

23. 23
    Trustroot▲85

    Fraud and theft protection for cryptocurrency

    2018 · trustroot.io · its alternatives →

24. 24
    Proof Of Time Travel▲87

    Using blockchain to prove time travel

    2018 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →