# Latest **URL:** https://community.blockcerts.org/latest.md?page=6 [Latest](https://community.blockcerts.org/latest.md) · [Categories](https://community.blockcerts.org/categories.md) **Page:** 7 --- ## [Add issuer in the mobile app](https://community.blockcerts.org/t/add-issuer-in-the-mobile-app/1075)
**Author:** [@jdelprado](https://community.blockcerts.org/u/jdelprado)\ **Replies:** 2\ **Last updated:** [May 28, 2021, 10:12am UTC](https://community.blockcerts.org/t/add-issuer-in-the-mobile-app/1075 "2021-05-28T10:12:51Z")
Hello, I am trying to add a new issuer in the mobile application and I do not know what to add in the field “Add your one-time code”. \[foto1\] I have read several previous posts but it is not clear to me. I’m working … --- ## [Does Blockcerts Support Private Ethereum?](https://community.blockcerts.org/t/does-blockcerts-support-private-ethereum/2857)
**Author:** [@sevzen](https://community.blockcerts.org/u/sevzen)\ **Replies:** 2\ **Last updated:** [May 27, 2021, 11:13pm UTC](https://community.blockcerts.org/t/does-blockcerts-support-private-ethereum/2857 "2021-05-27T23:13:51Z")
I understand that Blockcerts is designed for public Ethereum and the point is to have the certificates as decentralized as possible. But I have a case where there is a network of organizations that needs a certificate s… --- ## [Problem adding credential](https://community.blockcerts.org/t/problem-adding-credential/2869)
**Author:** [@Gilthanas](https://community.blockcerts.org/u/Gilthanas)\ **Replies:** 1\ **Last updated:** [May 27, 2021, 1:20pm UTC](https://community.blockcerts.org/t/problem-adding-credential/2869 "2021-05-27T13:20:42Z")
Hello everyone! I have a problem with uploading credentials from my phone. When I try to upload files all of the files are grey (despite trying out different formats). Am I stupid and missed something? Kind regards. --- ## [Blockcert Complete Project Step by Step](https://community.blockcerts.org/t/blockcert-complete-project-step-by-step/83)
**Author:** [@hasanali](https://community.blockcerts.org/u/hasanali)\ **Replies:** 19\ **Last updated:** [May 20, 2021, 5:28pm UTC](https://community.blockcerts.org/t/blockcert-complete-project-step-by-step/83 "2021-05-20T17:28:09Z")
I am testing blockcerts and trying to make a test project for verifying certificates on bitcoin blockchain. So far I have cloned certs-schema repository and found templates of JSON. Now I have installed Docker and stuc… --- ## [UnableToSignTxError](https://community.blockcerts.org/t/unabletosigntxerror/2835)
**Author:** [@LSmith](https://community.blockcerts.org/u/LSmith)\ **Replies:** 6\ **Last updated:** [May 13, 2021, 4:23pm UTC](https://community.blockcerts.org/t/unabletosigntxerror/2835 "2021-05-13T16:23:38Z")
I managed to add a test certificate to bitcoin regtest by following the instructions in the cert-issuer README.md. However when I attempt to do the same process on the bitcoin testnet, I get the following error when atte… --- ## [Do BlockCerts promotes sustainable eductaion system?](https://community.blockcerts.org/t/do-blockcerts-promotes-sustainable-eductaion-system/2856)
**Author:** [@yogibbaba](https://community.blockcerts.org/u/yogibbaba)\ **Replies:** 0\ **Last updated:** [May 13, 2021, 12:07pm UTC](https://community.blockcerts.org/t/do-blockcerts-promotes-sustainable-eductaion-system/2856 "2021-05-13T12:07:29Z")
From past some years i am trying to promote sustainable education with some helpful products which are alternative to daily use education or study material like pen, pencil, books and some other products that are plastic… --- ## [Can Blockcerts be used with R3 Corda?](https://community.blockcerts.org/t/can-blockcerts-be-used-with-r3-corda/2844)
**Author:** [@sevzen](https://community.blockcerts.org/u/sevzen)\ **Replies:** 2\ **Last updated:** [May 12, 2021, 2:45am UTC](https://community.blockcerts.org/t/can-blockcerts-be-used-with-r3-corda/2844 "2021-05-12T02:45:18Z")
I understand how the Blockcerts can be viewed as the most decentralized when using it with a public blockchain. However, for the project I am working on, there are multiple organizations that are working together and th… --- ## [What information should goes into the hash?](https://community.blockcerts.org/t/what-information-should-goes-into-the-hash/2837)
**Author:** [@sevzen](https://community.blockcerts.org/u/sevzen)\ **Replies:** 3\ **Last updated:** [May 10, 2021, 12:07pm UTC](https://community.blockcerts.org/t/what-information-should-goes-into-the-hash/2837 "2021-05-10T12:07:06Z")
What is the best practice for choosing what goes into the hash? Some ideas are: First name and last name of recipient First name, last name, year of issuing, name of the certificate First name, last name, year of issu… --- ## [The Flow of Blockcerts](https://community.blockcerts.org/t/the-flow-of-blockcerts/2490)
**Author:** [@Yang](https://community.blockcerts.org/u/Yang)\ **Replies:** 3\ **Last updated:** [May 9, 2021, 8:36pm UTC](https://community.blockcerts.org/t/the-flow-of-blockcerts/2490 "2021-05-09T20:36:08Z")
Hello, I read an article about Blockcerts, and drew of flow of it. Is there anything that needed to be revised or added? Thanks in advance! --- ## [How to Install Blockcerts for beginners](https://community.blockcerts.org/t/how-to-install-blockcerts-for-beginners/2819)
**Author:** [@aongoro](https://community.blockcerts.org/u/aongoro)\ **Replies:** 3\ **Last updated:** [May 7, 2021, 6:37am UTC](https://community.blockcerts.org/t/how-to-install-blockcerts-for-beginners/2819 "2021-05-07T06:37:48Z")
Information on the actual implementation of Blockcerts. How would an organization go about this process? Are there experts who can be hired to install and train? --- ## [Check Authencity "Transaction ocurred at time when issuing address was not considered valid"](https://community.blockcerts.org/t/check-authencity-transaction-ocurred-at-time-when-issuing-address-was-not-considered-valid/2805)
**Author:** [@Chidoman](https://community.blockcerts.org/u/Chidoman)\ **Replies:** 6\ **Last updated:** [May 4, 2021, 3:41pm UTC](https://community.blockcerts.org/t/check-authencity-transaction-ocurred-at-time-when-issuing-address-was-not-considered-valid/2805 "2021-05-04T15:41:34Z")
hi i’ve seen this problem , in other post ,i followed them but i cant solve it my cert-tools conf.ini issuer information issuer\_url = https://cloudmex.io/ issuer\_email = hola@cloudmex.io issuer\_name = Universidad … --- ## [Blog Post: "The Blockchain in Education"](https://community.blockcerts.org/t/blog-post-the-blockchain-in-education/779)
**Author:** [@Chris\_J](https://community.blockcerts.org/u/Chris_J)\ **Replies:** 4\ **Last updated:** [April 16, 2021, 10:14am UTC](https://community.blockcerts.org/t/blog-post-the-blockchain-in-education/779 "2021-04-16T10:14:29Z")
Since there have been so many new initiatives and announcements in regard to securing educational records with a blockchain, I decided to map out the space and show the unique positioning and value of Blockcerts. Comment… --- ## [Blockchain dedicated to academia](https://community.blockcerts.org/t/blockchain-dedicated-to-academia/2809)
**Author:** [@anilzen](https://community.blockcerts.org/u/anilzen)\ **Replies:** 0\ **Last updated:** [April 15, 2021, 6:59pm UTC](https://community.blockcerts.org/t/blockchain-dedicated-to-academia/2809 "2021-04-15T18:59:37Z")
It seems that the certification is currently pegged to a handful of existing blockchains with their preferred coins that have wild price fluctuations. Is there any discussion or suggestion to build a new blockchain (alt… --- ## [Blockcerts v3-beta](https://community.blockcerts.org/t/blockcerts-v3-beta/2802)
**Author:** [@lm-mc](https://community.blockcerts.org/u/lm-mc)\ **Replies:** 2\ **Last updated:** [April 13, 2021, 9:10pm UTC](https://community.blockcerts.org/t/blockcerts-v3-beta/2802 "2021-04-13T21:10:43Z")
Hi community, Following the release of the v3-alpha version last year, we’ve been working on the v3-beta update. The main purpose of this update is to add the display and metadata options as part of the official Blockc… --- ## [Merkletools dependences pysha3](https://community.blockcerts.org/t/merkletools-dependences-pysha3/649)
**Author:** [@enriquelizaso](https://community.blockcerts.org/u/enriquelizaso)\ **Replies:** 6\ **Last updated:** [April 12, 2021, 11:57am UTC](https://community.blockcerts.org/t/merkletools-dependences-pysha3/649 "2021-04-12T11:57:50Z")
Hi there! I’m trying to install cert-issuer, but when I run “python setup.py install”, I get the following error: Processing dependencies for cert-issuer==2.0.11 error: pysha3 1.0.2 is installed but pysha3==1.0b1 is r… --- ## [Dict object has no attribute split issue for etheruem setup](https://community.blockcerts.org/t/dict-object-has-no-attribute-split-issue-for-etheruem-setup/2350)
**Author:** [@arycloud](https://community.blockcerts.org/u/arycloud)\ **Replies:** 1\ **Last updated:** [April 12, 2021, 11:57am UTC](https://community.blockcerts.org/t/dict-object-has-no-attribute-split-issue-for-etheruem-setup/2350 "2021-04-12T11:57:46Z")
I’m facing an issue while running cert-issuer -c conf.ini and I have the following in my ethereum\_requirments.txt file: coincurve==7.1.0 rlp\<1 ethereum==2.3.1 Here’s the complete Traceback: Traceback (most recent c… --- ## [How to add multiple issuers in a single certificate?](https://community.blockcerts.org/t/how-to-add-multiple-issuers-in-a-single-certificate/2785)
**Author:** [@dekts](https://community.blockcerts.org/u/dekts)\ **Replies:** 1\ **Last updated:** [April 8, 2021, 7:01pm UTC](https://community.blockcerts.org/t/how-to-add-multiple-issuers-in-a-single-certificate/2785 "2021-04-08T19:01:27Z")
how to add multiple issuers profile in a single certificate? --- ## [Blockchain in Education](https://community.blockcerts.org/t/blockchain-in-education/2770)
**Author:** [@alaique](https://community.blockcerts.org/u/alaique)\ **Replies:** 1\ **Last updated:** [March 21, 2021, 12:51pm UTC](https://community.blockcerts.org/t/blockchain-in-education/2770 "2021-03-21T12:51:02Z")
Is there anyone who can assist with my question regarding Blockchain in Higher Education? Any qualifications, resources, articles, books, or ideas to get more information will be greatly appreciated. --- ## [\[ethereum\_ropsten\] Verification Error: MissingSchema: Invalid URL 'None': No schema supplied](https://community.blockcerts.org/t/ethereum-ropsten-verification-error-missingschema-invalid-url-none-no-schema-supplied/2755)
**Author:** [@nitinb](https://community.blockcerts.org/u/nitinb)\ **Replies:** 1\ **Last updated:** [March 12, 2021, 2:35pm UTC](https://community.blockcerts.org/t/ethereum-ropsten-verification-error-missingschema-invalid-url-none-no-schema-supplied/2755 "2021-03-12T14:35:20Z")
I am able to issue a certificate in Etherium ropsten network . I can view the certificate using flask app cert-viewer . but when I tried to verify the certificate by clicking the verify button ,It doesn’t verify. There… --- ## [Competencies for MakerSpaces, HackerSpaces & Fab Labs](https://community.blockcerts.org/t/competencies-for-makerspaces-hackerspaces-fab-labs/2760)
**Author:** [@jakes](https://community.blockcerts.org/u/jakes)\ **Replies:** 1\ **Last updated:** [March 7, 2021, 8:36pm UTC](https://community.blockcerts.org/t/competencies-for-makerspaces-hackerspaces-fab-labs/2760 "2021-03-07T20:36:44Z")
Hi, I’m presently working on my Masters around around the area of Makers & MakerSpaces (including HackerSpaces, Fab Labs, etc). My own competency around blockchain technologies is pretty superficial. One area of need … --- ## ["Security analysis of a blockchain-based protocol for the certification of academic credentials"](https://community.blockcerts.org/t/security-analysis-of-a-blockchain-based-protocol-for-the-certification-of-academic-credentials/2762)
**Author:** [@jakes](https://community.blockcerts.org/u/jakes)\ **Replies:** 0\ **Last updated:** [March 6, 2021, 8:41pm UTC](https://community.blockcerts.org/t/security-analysis-of-a-blockchain-based-protocol-for-the-certification-of-academic-credentials/2762 "2021-03-06T20:41:00Z")
We have analyzed a blockchain-based protocol for the certification of academic credentials named Blockcerts, which aims at certifying digital certificates compliant with the Open Badges standard through a public bloc… --- ## [Can we verify a pdf/image file directly using blockcerts](https://community.blockcerts.org/t/can-we-verify-a-pdf-image-file-directly-using-blockcerts/2748)
**Author:** [@nitinb](https://community.blockcerts.org/u/nitinb)\ **Replies:** 3\ **Last updated:** [February 25, 2021, 7:02am UTC](https://community.blockcerts.org/t/can-we-verify-a-pdf-image-file-directly-using-blockcerts/2748 "2021-02-25T07:02:47Z")
Hi Guys, Past few days I am trying my hand on Blockcerts. Its awesome. Really liked trying it out. I have just one query . Can we verify a PDF file directly? The file may contain some Images, graphs ,Text. The idea i… --- ## [Use cert\_issuer instead of cert tools to create certificate?](https://community.blockcerts.org/t/use-cert-issuer-instead-of-cert-tools-to-create-certificate/2725)
**Author:** [@nitinb](https://community.blockcerts.org/u/nitinb)\ **Replies:** 1\ **Last updated:** [February 24, 2021, 2:18pm UTC](https://community.blockcerts.org/t/use-cert-issuer-instead-of-cert-tools-to-create-certificate/2725 "2021-02-24T14:18:03Z")
As I understood Cert\_tools repo is used to create a blockcert certificate. & cert issuer can issue certificate ,ie put them in blockchain network. But I have a querry- Can we use cert\_issuer to both create and issue … --- ## [Fix iso format for v3 in cert-tool](https://community.blockcerts.org/t/fix-iso-format-for-v3-in-cert-tool/2753)
**Author:** [@yosuke](https://community.blockcerts.org/u/yosuke)\ **Replies:** 1\ **Last updated:** [February 24, 2021, 2:10pm UTC](https://community.blockcerts.org/t/fix-iso-format-for-v3-in-cert-tool/2753 "2021-02-24T14:10:34Z")
I just found the problem of iso\_format between cert\_tool and cert\_issuer in V3. When I tried to issue the template that I created with cert\_tool, I got the format error because the value of “issueOn” did not match the m… --- ## [Blockcerts V3 Proposal - Verifiable Credentials & Decentralized Identifiers](https://community.blockcerts.org/t/blockcerts-v3-proposal-verifiable-credentials-decentralized-identifiers/2221)
**Author:** [@aronning](https://community.blockcerts.org/u/aronning)\ **Replies:** 22\ **Last updated:** [February 21, 2021, 6:59pm UTC](https://community.blockcerts.org/t/blockcerts-v3-proposal-verifiable-credentials-decentralized-identifiers/2221 "2021-02-21T18:59:30Z")
Hello community! Some of you may already know and/or have been following along. Over the last few months, since Rebooting the Web of Trust 9, we have been coming up with drafts and proposals for Blockcerts V3 for the al… --- ## [Android Wallet - Credential is in an outaded format](https://community.blockcerts.org/t/android-wallet-credential-is-in-an-outaded-format/2747)
**Author:** [@nSync](https://community.blockcerts.org/u/nSync)\ **Replies:** 0\ **Last updated:** [February 9, 2021, 4:40pm UTC](https://community.blockcerts.org/t/android-wallet-credential-is-in-an-outaded-format/2747 "2021-02-09T16:40:22Z")
Hi! I’m currently working on Blockcertes for my thesis and I have created my own certificate with cert-tools and cert-issuer in the bitcoin testnet but, when I try to view my certificate with the app “Blockcerts”, for a… --- ## [Open Badges implementation without Blockcerts](https://community.blockcerts.org/t/open-badges-implementation-without-blockcerts/2742)
**Author:** [@Takuma](https://community.blockcerts.org/u/Takuma)\ **Replies:** 1\ **Last updated:** [February 8, 2021, 11:03am UTC](https://community.blockcerts.org/t/open-badges-implementation-without-blockcerts/2742 "2021-02-08T11:03:58Z")
Hi, everyone. I have a quesion on Open Badges. Are there any way to implement Open Badges without Blockcerts? If so, I wonder how can I ensure security? I mean how to prevent forgeries and / or falsifications? I rea… --- ## [Blockcerts Training](https://community.blockcerts.org/t/blockcerts-training/2687)
**Author:** [@jackblock](https://community.blockcerts.org/u/jackblock)\ **Replies:** 1\ **Last updated:** [February 5, 2021, 5:19pm UTC](https://community.blockcerts.org/t/blockcerts-training/2687 "2021-02-05T17:19:45Z")
Any one can help me? I’ll like to be trained and want to understand blockcerts implementation process from issuing , revocation and verification. --- ## [Unable to install cert tools](https://community.blockcerts.org/t/unable-to-install-cert-tools/2558)
**Author:** [@tommparekh](https://community.blockcerts.org/u/tommparekh)\ **Replies:** 1\ **Last updated:** [February 5, 2021, 5:02pm UTC](https://community.blockcerts.org/t/unable-to-install-cert-tools/2558 "2021-02-05T17:02:38Z")
I am trying to install cert tools in vagrant ubuntu 18.04 box using python virtual env. Getting below errors. Building wheels for collected packages: cert-tools, pycoin … --- ## [How to get issuer\_public\_key to put in conf.in in cert\_tools](https://community.blockcerts.org/t/how-to-get-issuer-public-key-to-put-in-conf-in-in-cert-tools/2724)
**Author:** [@nitinb](https://community.blockcerts.org/u/nitinb)\ **Replies:** 0\ **Last updated:** [January 29, 2021, 11:31am UTC](https://community.blockcerts.org/t/how-to-get-issuer-public-key-to-put-in-conf-in-in-cert-tools/2724 "2021-01-29T11:31:06Z")
Hi I am fairly new to blockcerts and trying to replicate it. I am using cert\_tools to create a custom certificate. I have few doubts doubts - How can I get the issuer\_public\_key to mention in conf.ini in the cert\_… [Previous page](https://community.blockcerts.org/latest.md?page=5) [Next page](https://community.blockcerts.org/latest.md?page=7)