Joined September 2016
11 Photos and videos
OpenTimestamps retweeted
Canada’s proposed Bill C-22 is so broad that my @opentimestamps calendar service could be a Electronic Service regulated by it. One calendar is hosted in Toronto. C-22 requires metadata retention up to one year; my calendars delete IP logs after two weeks. I will not comply.
🚨 Canada’s Bill C-22 is here & it’s the same surveillance bill from last year's failed C-2. 🚨 What does this mean? ❌ Your metadata would be stored by electronic service providers - for example messaging and email providers - for up to 12 months. ❌ The government would force these companies to build surveillance capabilities directly into their platforms. The government calls it “lawful access” but we know that forcing providers to enable access to encrypted data puts EVERYONE'S privacy & security at risk. 😡 Because we know that there is no backdoor for the good guys only! Help us fight for Canadian's privacy & say no to this surveillance bill. Send a letter to reject Bill C-22 here 👉 internetsociety.org/our-work… #Canada #CanadaBill #Surveillance
3
26
145
10,534
OpenTimestamps retweeted
Replying to @Jeremybtc
It would be great if @x used @opentimestamps on all their posts. It would cryptographically prove beyond a shadow of a doubt that posts were posted when it says they were posted. Probably futile, but cc @nikitabier.
2
2
11
4,002
Good reason to use OpenTimestamps to timestamp your git commits: if GitHub, etc. does something insane to old commits, you can easily spot it because the timestamps will be wiped out. Also, PGP sign your git commits locally! petertodd.org/2016/opentimes…

This GitHub incident is insane. Merge queue commits have been reverting previously merged commits at random. This not only breaks the mental contract teams have with Git in general, but is subtle enough to be really hard to unravel after the fact. githubstatus.com/incidents/z…
3
1
17
12,661
OpenTimestamps retweeted
Maybe you should read the paper, because yeah, exactly one mitigation I mentioned ;)
1
1
7
2,095
The Bob calendar is down right now because it's out of funds to pay tx fees: bob.btc.calendar.opentimesta… If people can send funds to bc1q83zmvtfks2dnvqfgcmxme24kah602cxr59h5v7 to get it back up that'd be much appreciated.
5
12
3,676
bellingcat.gitbook.io/toolki… @bellingcat's archival tool for social media posts, videos, and images uses OpenTimestamps. YouTube, Twitter, Telegram, etc. won't provide a signature on their data. So the best verifiable evidence that an archive is authentic is an OTS timestamp.
2
3
14
3,284
Historical reunion of the "Merkle Brothers" tonight at the @SatoshiLugano!!! The @opentimestamps OGs: @RCasatta and @peterktodd!
21
9
88
8,960
OpenTimestamps retweeted
.@internetarchive why are you not using @opentimestamps? We are now in an era of seemless fabrication of content. Thermodynamic impossible to forge proofs of when data was first recorded is literally the most important thing on the internet now.
6
8
85
4,379
OpenTimestamps retweeted
Awesome! Someone finally collected this bounty: github.com/opentimestamps/op…
29 Aug 2025
Replying to @peterktodd
You can construct an @opentimestamps proof for the file @CommerceGov timestamped and the transaction fcf172401ca9d89013f13f5bbf0fc7577cb8a3588bf5cbc3b458ff36635fec00 Bounty: first person who replies with a valid OpenTimestamps proof for this gets 100k sats!
5
4
29
7,285
Triggering some Solana degens for science. 😂 97DDKmdqUcdU5EViLYuWydBE72W9inSbJVmN62GyBAGS
88
58
230
55,951
Interesting project! projecttimestamper.org/
Replying to @projtimestamper
So our independent work at Project Timestamper has been to digitally timestamp these 86 million individual recorded tracks to anchor their authenticity. We embedded these timestamps on the Bitcoin blockchain using the OpenTimestamps service. 6/
4
5
38
18,671
OpenTimestamps retweeted
We just contributed to The OpenTimestamps Calendars on Geyser! Creators using Web3 COAs with OTS should consider this: geyser.fund/project/opentime…

3
9
8,843
OpenTimestamps retweeted
27 Dec 2025
I was renewing some domain names and noticed that the @opentimestamps domains were getting a bit close to expiry. They're now renewed until 2035! OTS is here for the long run! Of course, that costs money. Help me keep it running for another decade: geyser.fund/project/opentime…
5
9
64
11,433
OpenTimestamps retweeted
Another major highlight: The Ministry of Foreign Affairs (@cancilleriasv) and the Ministry of Environment (@MedioAmbienteSV) have begun protecting official documents on the Bitcoin blockchain, using @opentimestamps. @carlostoriello @realSimpleProof This is digital sovereignty in action — transparent, immutable, verifiable. diarioelsalvador.com/cancill…

1
3
15
3,487
RT @peterktodd: The E Salvadoran government is pioneering the use of efficient, @opentimestamps based, Bitcoin time-stamping. All governme…
2
2,189
OpenTimestamps retweeted
1 Oct 2025
geyser.fund/project/opentime… At the btc Berlin Hackathon we're doing a new award: The Most Unnecessary Use of OpenTimestamps In An Otherwise Serious Entry, with a 42,000sat prize. With your donations we hope to guide a young hitchhiker to an entire galaxy of OpenTimestamps uses..

5
5
27
12,722
OpenTimestamps retweeted
Replying to @opentimestamps
@opentimestamps New Haskell library and -client! Work in progress, but already functional. Details and links to Codeberg repositories here: photonsphere.org/post/2025-0…
1
2
5
3,092
OpenTimestamps retweeted
29 Aug 2025
You can construct an @opentimestamps proof for the file @CommerceGov timestamped and the transaction fcf172401ca9d89013f13f5bbf0fc7577cb8a3588bf5cbc3b458ff36635fec00 Bounty: first person who replies with a valid OpenTimestamps proof for this gets 100k sats!
4
5
18
14,171