Alternatives

Products that do what Proof Of Time Travel does

Using blockchain to prove time travel

1
TimeSeal▲116
Restoring digital trust, one blockchain timestamp at a time
2023
2
Blockchain Demo▲862
Visual demonstration of blockchain technology
2017 · blockchaindemo.io
3AE
An educational blockchain implementation in Python▲412
2017 · github.com
4
Time Ledger▲326
Manage your time like you manage your money.
Feb 2026
5
TimeProof▲5
Prove it existed. Permanently.
Jan 2026
6BT
btproof - trusted timestamping on the Bitcoin blockchain▲75
2013 · btproof.com
7
Time Travel▲85
Simple, beautiful and interactive world clock.
2019
8
Social Blockchain▲143
Explore what the world is sharing
2018
9
Time Travel▲89
Convert timezones faster than ever!
2020
10
BlockchainNote.live▲70
Note that can be changed by anyone, but only once an hour
2022
11TT
Time travel debugging AI for more reliable vibe coding▲129
Hi HN, I'm the CEO at https://replay.io. We've been building a time travel debugger for web apps for several years now (previous HN post: https://news.ycombinator.com/item?id=28539247) and are combining our tech with AI to automate the debugging process. AIs are really good at writing code but really bad at debugging -- it's amazing to use Claude to prompt an app into existence, and pretty frustrating when that app doesn't work right and Claude is all thumbs fixing the problem. The basic reason for this is a lack of context. People can use devtools to understand…
2025 · nut.new
12
Streams▲106
Real-time blockchain data streaming made simple
2024
13
Claimby▲107
Free legally-valid timestamps for your files, ideas & art.
2018
14
Handshake▲217
Put promises on the blockchain
2018
15
ChainGPT▲188
Unleash the power of Blockchain AI with ChainGPT
2023
16AA
Anchor any file to Bitcoin to prove it existed at a specific time▲8
Finding the balance between humans and machines has been the thread through my career. I always had a thing for AI and couldn't wait for it to actually deliver on what was promised. Now it does, and it's more important than ever that humans and machines keep working well together. AI makes creation trivial. Text, code, design, strategy, in seconds. But one thing AI does not create: independently verifiable proof of when something existed. Reproducing is now cheaper and easier than creating. Chronology becomes contestable at the moment it matters most. The universal problem was known. I…
Mar 2026 · umarise.com
17OF
OpenTimes – Free travel times between U.S. Census geographies▲207
Hi HN! Today I'm launching OpenTimes, a free database of roughly 150 billion pre-computed, point-to-point travel times between United States Census geographies. In addition to letting you visualize travel isochrones on the homepage, OpenTimes also lets you download massive amounts of travel time data for free and with no limits. The primary goal here is to enable research and fill a gap I noticed in the open-source spatial ecosystem. Researchers (social scientists, economists, etc.) use large travel time matrices to quantify things like access to healthcare, but they often end up paying…
2025 · opentimes.org
18
ConfessionChain▲93
Anonymous confessions on the blockchain
2018
19
Blockdata▲107
A simpler way to do blockchain research
2018
20
Proof.ink▲100
Proven immutable data stored on the Steem blockchain
2019
21
ProveSource▲98
Boost your website conversions for free
2018
22WA
WordLines – A zero-knowledge proof-based blockchain puzzle game▲83
2022 · github.com
23
Bitproof▲113
True certification in the bitcoin blockchain
2015
24
yousaidthat.org▲63
Prove that you said things before anyone else
Jun 2026 · yousaidthat.org

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