parkan

# request fingerprint lookup from the API
% curl -X POST -H 'Content-Type: application/json' \
  -d '{"image_url": "http://www.susanmeiselas.com/images/uploads/MolotovMan-Booklet_520p_70_1.jpg"}' \
  https://mediachain-resolver.herokuapp.com/search
{
  "matches": [
    {
      "confidence": 1.0,
      "instance_id": "6580df51ed0d44b3a5519c1fc4e69e378df6ffde",
      "metadata_id": "QmRBHQVmjKTv6ust1SVjJ4WLQb2p7PJaA1bEespBjb8SwY"

parkan

Design

This is the layer of the Canonical Content Registry that allows location of metadata identifiers pointing into the registration store based on perceptual similarity. The DHT is keyed by an appropriate perceptual hash (for example, Fixed Length MH Hash from phash.org for images) hashed again using a Locality Sensitive Hash such as RHH, which allows for efficient similarity search as in Hamming DHT. Keys that collide fully are chained and may be disambiguated as described below.

As in the Hamming DHT, near match keys may be returned, up to a threshold.

The values include a "name" identifier for the registration store and possibly several other perceptual hashes or other derived data (e.g. haar-like features, histogram, etc) for the work that can be used to further disambiguate the query. The client may send up these a

parkan

Canonical Content Registry Foundation

Today, there is no reliable way to persist metadata for digital media as it travels across the internet.

Mine is working to build a global content registry on top of the Bitcoin blockchain to serve as an open metadata layer for canonical representations of digital media.

The goal of such a registry is to enable a new decentralized hypermedia protocol that powers the next generation of digital content applications, where creators and consumers to own their media, identity and interactions across the internet, without dependency on industrial or platform gatekeepers.

In March, we published a high level summary of how such such a system could work, titled the Canonical Content Registry. Today, we are taking the first steps to start building it by sharing a proposal for a technical implementation on top of Blockstore. We welcome your feedback and look forward to starting a conversation.

parkan

b2d-shellinit(){
    [ -z "$DOCKER_HOST" ] && $(boot2docker shellinit)
}

alias dc='b2d-shellinit; docker-compose'
alias dcr='b2d-shellinit; docker-compose run'
alias dcr-heroku='b2d-shellinit; docker-compose run `heroku config -a XXX-production | tail +2 | tr -s " " | sed -E "s/^([^ ]+): (.+)/-e \1=\2/" | tr "\\n" " "` api rails c'
alias dcr-heroku-staging='b2d-shellinit; docker-compose run `heroku config -a XXX-staging | tail +2 | tr -s " " | sed -E "s/^([^ ]+): (.+)/-e \1=\2/" | tr "\\n" " "` api rails c'

parkan

Verifying I am +arkadiy on my passcard. https://onename.com/arkadiy

parkan

# this replaces https://github.com/tpope/heroku-surrogate for docker containers (sort of)
docker-compose run `heroku config -a $APPNAME | tail +2 | tr -s " " | sed -E "s/^([^ ]+): (.+)/-e \1=\2/" | tr "\\n" " "` api rails c

parkan

parkan

[0ff3a49...//src]% git remote -v                                (arkadiy@sodium:~/src/)
origin	https://chromium.googlesource.com/chromium/src.git (fetch)
origin	https://chromium.googlesource.com/chromium/src.git (push)
[0ff3a49...//src]% git shortlog -sn | wc -l                     (arkadiy@sodium:~/src/)
    3385

parkan

[~]% pip install twisted                                              (arkadiy@sodium:~)
Downloading/unpacking twisted
  Downloading Twisted-14.0.2.tar.bz2 (4.3MB): 4.3MB downloaded
  Running setup.py (path:/private/var/folders/sm/38kkrt9n5z5524hmxqn3h8yh0000gq/T/pip_build_arkadiy/twisted/setup.py) egg_info for package twisted

Downloading/unpacking zope.interface>=3.6.0 (from twisted)
  Downloading zope.interface-4.1.1.tar.gz (864kB): 864kB downloaded
  Running setup.py (path:/private/var/folders/sm/38kkrt9n5z5524hmxqn3h8yh0000gq/T/pip_build_arkadiy/zope.interface/setup.py) egg_info for package zope.interface

    warning: no previously-included files matching '*.dll' found anywhere in distribution

parkan

#!/usr/local/bin/ruby

grep = `git grep -n #{ARGV[0]} #{ARGV[1]}`

interrupt = false

grep.split("\n").each do |file_with_line|
  exit if interrupt

  file, line_number, line = file_with_line.split(':', 3)