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<!DOCTYPE html>
<html lang="it">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Verifica Blockchain — OpenTimestamps</title>
<style>
*{margin:0;padding:0;box-sizing:border-box}
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.hdr h1{font-size:24px;font-weight:800;margin:0 0 6px;position:relative}
.hdr p{font-size:13px;opacity:.7;position:relative}
.hdr .tag{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);padding:4px 14px;border-radius:20px;font-size:11px;font-weight:700;letter-spacing:.8px;margin-top:12px;position:relative}
.bd{padding:32px}
.drop{border:3px dashed #cbd5e1;border-radius:16px;padding:48px 24px;text-align:center;cursor:pointer;transition:all .3s;background:#f8fafc}
.drop:hover,.drop.over{border-color:#3b82f6;background:#eff6ff;transform:scale(1.01)}
.drop.ok{border-color:#10b981;background:#ecfdf5}
.drop input{display:none}
.hbox{background:linear-gradient(135deg,#0f172a,#1e293b);border-radius:14px;padding:20px;margin:20px 0;display:none;position:relative;overflow:hidden}
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.btn{display:block;width:100%;padding:16px;background:linear-gradient(135deg,#0f4c75,#1b6ca8,#3b82f6);color:#fff;font-size:16px;font-weight:800;border:none;border-radius:14px;cursor:pointer;margin-top:20px;transition:all .2s;letter-spacing:.5px;position:relative;overflow:hidden}
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@keyframes shimmer{0%{left:-100%}100%{left:100%}}
.btn:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(59,130,246,.35)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn:disabled::before{display:none}
.res{margin-top:28px;display:none}
.res.show{display:block;animation:fd .5s ease}
@keyframes fd{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.r-box{border-radius:16px;padding:24px;position:relative;overflow:hidden}
.r-verified{background:linear-gradient(135deg,#ecfdf5,#d1fae5);border:2px solid #a7f3d0}
.r-pending{background:linear-gradient(135deg,#fffbeb,#fef3c7);border:2px solid #fde68a}
.r-notfound{background:linear-gradient(135deg,#eff6ff,#dbeafe);border:2px solid #93c5fd}
.r-error{background:linear-gradient(135deg,#fef2f2,#fecaca);border:2px solid #fca5a5}
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.sep{margin-top:20px;padding-top:20px;border-top:2px solid rgba(0,0,0,.06)}
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.spin{width:20px;height:20px;border:2.5px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:sp .6s linear infinite;display:inline-block;vertical-align:middle;margin-right:10px}
@keyframes sp{to{transform:rotate(360deg)}}
.steps{margin-top:16px}.step{display:flex;align-items:center;gap:10px;padding:6px 0;font-size:13px;color:#94a3b8;transition:all .3s}
.step.active{color:#1e293b;font-weight:600}.step.done{color:#10b981}.step.fail{color:#ef4444}
.step-dot{width:24px;height:24px;border-radius:50%;border:2px solid #cbd5e1;display:flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0;transition:all .3s}
.step.active .step-dot{border-color:#3b82f6;background:#eff6ff;animation:pulse 1.5s ease infinite}
.step.done .step-dot{border-color:#10b981;background:#ecfdf5;color:#10b981}
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@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(59,130,246,.3)}50%{box-shadow:0 0 0 8px rgba(59,130,246,0)}}
footer{text-align:center;font-size:11px;color:#94a3b8;margin-top:20px}
footer a{color:#3b82f6;text-decoration:none}
</style>
</head>
<body>
<div class="card">
<div class="hdr">
<h1>⛓ Verifica Blockchain</h1>
<p>Verifica automatica dell'ancoraggio alla blockchain Bitcoin</p>
<div class="tag">🔒 AUTOMATICA — Basta il documento</div>
</div>
<div class="bd">
<details style="background:#f8fafc;border:1px solid #e2e8f0;border-radius:10px;padding:12px 16px;margin-bottom:16px;">
<summary style="cursor:pointer;font-size:12px;font-weight:600;color:#64748b;">⚙ Server di verifica</summary>
<div style="margin-top:10px;">
<input type="text" id="api-base" value="https://docusign.ce4u.it" style="width:100%;padding:8px 12px;border:1px solid #e2e8f0;border-radius:8px;font-size:12px;font-family:monospace;" />
<p style="font-size:11px;color:#94a3b8;margin-top:4px;">Modifica se usi un server diverso.</p>
</div>
</details>
<div class="drop" id="drop" onclick="document.getElementById('fi').click()">
<div style="font-size:48px;margin-bottom:10px" id="di">📄</div>
<p style="font-size:16px;font-weight:700;color:#334155;margin-bottom:4px" id="dt">Trascina qui il documento PDF</p>
<p style="font-size:13px;color:#94a3b8" id="ds">oppure clicca per selezionare — il resto è automatico</p>
<input type="file" id="fi" accept=".pdf,application/pdf"/>
</div>
<div class="hbox" id="hb">
<div class="hlbl">Impronta crittografica SHA-256</div>
<div class="hval" id="hv"></div>
</div>
<button class="btn" id="btn" disabled onclick="go()">⛓ Verifica Ancoraggio Blockchain</button>
<!-- Progress steps -->
<div class="steps" id="steps" style="display:none">
<div class="step done" id="s1"><div class="step-dot">✓</div><span>Documento caricato</span></div>
<div class="step" id="s2"><div class="step-dot">•</div><span>Calcolo hash SHA-256</span></div>
<div class="step" id="s3"><div class="step-dot">•</div><span>Interrogazione calendar OpenTimestamps</span></div>
<div class="step" id="s4"><div class="step-dot">•</div><span>Verifica ancoraggio Bitcoin</span></div>
</div>
<div class="res" id="res"><div id="rc"></div></div>
</div>
</div>
<footer>
<a href="https://github.com/cartenca73/cdc-blockchain-verify">🔗 Codice sorgente</a> —
<a href="https://opentimestamps.org">OpenTimestamps</a>
</footer>
<script>
(function(){
var drop=document.getElementById('drop'),fi=document.getElementById('fi'),
btn=document.getElementById('btn'),res=document.getElementById('res'),rc=document.getElementById('rc'),
steps=document.getElementById('steps'),hash=null,fileBytes=null;
// File handling
['dragenter','dragover'].forEach(function(e){drop.addEventListener(e,function(ev){ev.preventDefault();drop.classList.add('over');});});
['dragleave','drop'].forEach(function(e){drop.addEventListener(e,function(ev){ev.preventDefault();drop.classList.remove('over');});});
drop.addEventListener('drop',function(e){if(e.dataTransfer.files[0])handleFile(e.dataTransfer.files[0]);});
fi.addEventListener('change',function(){if(this.files[0])handleFile(this.files[0]);});
function handleFile(f){
document.getElementById('di').textContent='\u2705';
document.getElementById('dt').textContent=f.name;
document.getElementById('ds').textContent=(f.size/1024).toFixed(1)+' KB — pronto per la verifica';
drop.classList.add('ok');res.classList.remove('show');steps.style.display='none';
var r=new FileReader();
r.onload=function(e){
fileBytes=new Uint8Array(e.target.result);
crypto.subtle.digest('SHA-256',e.target.result).then(function(h){
hash=Array.from(new Uint8Array(h)).map(function(b){return b.toString(16).padStart(2,'0');}).join('');
document.getElementById('hv').textContent=hash;
document.getElementById('hb').classList.add('show');
btn.disabled=false;
});
};
r.readAsArrayBuffer(f);
}
function setStep(n,state){
for(var i=1;i<=4;i++){
var el=document.getElementById('s'+i);
el.className='step'+(i<n?' done':(i===n?' '+state:''));
if(i<n)el.querySelector('.step-dot').innerHTML='✓';
else if(i===n&&state==='done')el.querySelector('.step-dot').innerHTML='✓';
else if(i===n&&state==='fail')el.querySelector('.step-dot').innerHTML='✗';
}
}
// Configurable API base URL
var API_BASE = (document.getElementById('api-base')||{}).value || 'https://docusign.ce4u.it';
window.go=function(){
if(!hash)return;
btn.disabled=true;btn.innerHTML='<span class="spin"></span>Ricerca sulla blockchain...';
res.classList.remove('show');steps.style.display='block';
setStep(2,'done');
setTimeout(function(){ setStep(3,'active'); queryBlockchain(); },400);
};
function queryBlockchain(){
API_BASE = (document.getElementById('api-base')||{}).value || API_BASE;
// Step 1: Query our public API for blockchain info
fetch(API_BASE+'/cdc/blockchain-info/'+hash)
.then(function(r){ return r.json(); })
.then(function(data){
if(data.found){
setStep(3,'done');
setStep(4,'active');
// Step 2: If OTS proof available, download and verify it
if(data.has_ots_proof){
fetch(API_BASE+'/cdc/ots/'+hash)
.then(function(r){ return r.ok ? r.arrayBuffer() : null; })
.then(function(otsBuf){
setStep(4,'done');
btn.disabled=false;btn.textContent='\u26D3 Verifica Ancoraggio Blockchain';
showVerified(data, otsBuf ? new Uint8Array(otsBuf) : null);
})
.catch(function(){
setStep(4,'done');
btn.disabled=false;btn.textContent='\u26D3 Verifica Ancoraggio Blockchain';
showVerified(data, null);
});
} else {
setStep(4,'done');
btn.disabled=false;btn.textContent='\u26D3 Verifica Ancoraggio Blockchain';
showVerified(data, null);
}
} else {
setStep(3,'fail');
btn.disabled=false;btn.textContent='\u26D3 Verifica Ancoraggio Blockchain';
showNotFound();
}
})
.catch(function(err){
setStep(3,'fail');
btn.disabled=false;btn.textContent='\u26D3 Verifica Ancoraggio Blockchain';
showNotFound();
});
}
function showVerified(d, otsData){
res.classList.add('show');
var anchored = d.blockchain_anchored_at ? new Date(d.blockchain_anchored_at).toLocaleString('it-IT') : 'N/D';
var receipt = d.blockchain_receipt;
var h='<div class="r-box r-verified">'
+'<div class="badge ok">☑ ANCORATO SU BLOCKCHAIN</div>'
+'<p style="font-size:15px;font-weight:700;color:#065f46;margin-bottom:16px;">L\'impronta di questo documento \u00e8 stata registrata permanentemente sulla blockchain.</p>'
+'<div class="grid">'
+R('Hash SHA-256',d.document_hash,1)
+R('Algoritmo',d.hash_algorithm)
+R('Rete',d.blockchain_chain_name)
+R('TX Hash',d.blockchain_tx_hash,1)
+(d.blockchain_block_number?R('Blocco','<a href="https://blockstream.info/block-height/'+d.blockchain_block_number+'" target="_blank">#'+d.blockchain_block_number+' \u2197</a>'):'')
+R('Calendar/Wallet',d.blockchain_wallet,1)
+R('Ancorato il',anchored)
+(d.blockchain_explorer_url?R('Explorer','<a href="'+esc(d.blockchain_explorer_url)+'" target="_blank">Apri \u2197</a>'):'')
+'</div>';
if(receipt){
h+='<div class="sep"><div class="sep-t">📜 Ricevuta di Certificazione</div><div class="grid">';
if(receipt.signer)h+=R('Firmatario',receipt.signer.name);
if(receipt.document){h+=R('Hash documento',receipt.document.hash,1);h+=R('Algoritmo',receipt.document.algorithm);}
if(receipt.payment){
h+=R('Pagamento',receipt.payment.amount+' '+receipt.payment.currency);
h+=R('Provider',receipt.payment.provider);
h+=R('Transazione',receipt.payment.transaction_id,1);
h+=R('Merchant',receipt.payment.merchant_name);
if(receipt.payment.timestamp)h+=R('Data pagamento',new Date(receipt.payment.timestamp).toLocaleString('it-IT'));
}
h+='</div></div>';
}
if(otsData){
h+='<div class="sep"><div class="sep-t">🔒 Prova OTS</div>'
+'<p style="font-size:12px;color:#475569;margin-bottom:8px;">File di prova OpenTimestamps ('+otsData.length+' bytes)</p>'
+'<button onclick="downloadOts()" style="padding:8px 16px;background:#fff;border:1px solid #a7f3d0;border-radius:8px;color:#065f46;font-weight:600;font-size:13px;cursor:pointer;">⬇ Scarica file .ots</button></div>';
window._otsData=otsData;
window.downloadOts=function(){
var b=new Blob([window._otsData],{type:"application/octet-stream"});
var a=document.createElement("a");a.href=URL.createObjectURL(b);a.download=hash+".ots";a.click();
};
}
h+='<div class="sep"><div class="sep-t">💡 Cosa significa</div>'
+'<p style="font-size:13px;color:#475569;line-height:1.7;">L\'hash SHA-256 di questo documento \u00e8 stato incluso nella blockchain Bitcoin tramite il protocollo OpenTimestamps. '
+'Questo prova matematicamente che il documento esisteva nella sua forma attuale al momento della registrazione. '
+'Nessuno pu\u00f2 alterare retroattivamente questa prova.</p></div>';
h+='</div>';
rc.innerHTML=h;
}
function showNotFound(){
res.classList.add('show');
rc.innerHTML='<div class="r-box r-notfound">'
+'<div class="badge info">🔎 NON TROVATO</div>'
+'<p style="font-size:14px;font-weight:600;color:#1e40af;margin-bottom:12px;">Nessun ancoraggio blockchain trovato per questo documento.</p>'
+'<div class="grid" style="margin-top:12px">'+R('Hash SHA-256',hash,1)+'</div>'
+'<div class="sep"><div class="sep-t">💡 Possibili cause</div>'
+'<ul style="font-size:13px;color:#475569;line-height:1.8;padding-left:20px;">'
+'<li>Il documento non \u00e8 stato certificato con CDC</li>'
+'<li>L\'ancoraggio \u00e8 molto recente (attendere qualche ora)</li>'
+'<li>Il documento \u00e8 stato modificato dopo la certificazione</li></ul></div></div>';
}
function R(l,v,m){if(!v&&v!==0)return '';return '<div class="lbl">'+esc(String(l))+'</div><div class="val'+(m?' mono':'')+'">'+v+'</div>';}
function esc(s){if(!s)return '';var d=document.createElement('div');d.textContent=String(s);return d.innerHTML;}
})();
</script>
</body>
</html>