Finance (Crypto and exchanges), Proof of reserves

An exchange's proof of reserves on a trading terminal: a tag and the headline, a panel with the date the holdings were taken and who attested them, and up to six assets, each with its coin, its reserves, the customer balances against them and the ratio as sent over a meter of block cells that fills to it, lit in turn, then the button and the brand's analyst. The risk warning and the not-advice line stay on screen throughout. Eight seconds, and over half a second longer per asset.

Template	Finance (Crypto and exchanges), `tpl_20eb67de501a`
Variant	Proof of reserves
Version	1.0.0, the newest: what a channel following this variant draws
Shapes	9x16, 4x5, 1x1, 16x9, 2x3
Length	12 seconds

Example video

The 1x1 cut of this variant, drawn from its own worked example. Open the video on its own.

What it accepts

An exchange's proof of reserves: the headline, the date and who attested it, and up to six assets, each with its reserves, the customer balances against them and the ratio as sent on a meter of block cells, lit in turn, then the button and your analyst. The risk warning and the not-advice line stay on screen throughout. Eight seconds, over half a second longer per asset. metaData is never drawn.

Field	Type	Required	Limit	What it is
`clipData`	group	yes		Clip data: Everything drawn in the clip: the tag, the headline, the date and who attested the proof, the assets with their reserves, balances and ratios, the call to action and the risk lines.
`clipData.tag`	text		up to 20 characters	Tag: The kind of post, in the block at the top, such as Proof of reserves.
`clipData.stamp`	text		up to 24 characters	Status: A short status beside the light at the top, such as LIVE or 24/7.
`clipData.headline`	text		up to 72 characters	Headline: What the proof says, in a few words.
`clipData.asOfLabel`	text	yes	up to 24 characters	As-of caption: The caption before the date, such as As of.
`clipData.asOf`	text	yes	up to 40 characters	As of: The date and time the holdings and balances were taken, with its time zone, exactly as you want it shown.
`clipData.attestedByLabel`	text	yes	up to 24 characters	Attested-by caption: The caption before the name, such as Attested by.
`clipData.attestedBy`	text	yes	up to 60 characters	Attested by: Who attested the proof: the auditor or the firm that checked it.
`clipData.assetsLabel`	text		up to 40 characters	Table caption: The caption on the assets panel's header strip.
`clipData.reservesLabel`	text	yes	up to 16 characters	Reserves caption: The caption over each asset's reserves.
`clipData.balancesLabel`	text	yes	up to 20 characters	Balances caption: The caption over each asset's customer balances.
`clipData.ratioUnit`	text		up to 4 characters	Ratio unit: What follows each ratio, such as % or x. With % a ratio under 100 is drawn in your down colour and 100 or more in your up colour.
`clipData.assets`	list	yes	at least 1, up to 6	Assets: Up to six assets, each with its reserves, the customer balances and the ratio, exactly as you send them. Each is lit in turn.
`clipData.assets[]`	group			Asset
`clipData.assets[].symbol`	text	yes	up to 12 characters	Symbol: The asset's ticker symbol, such as BTC.
`clipData.assets[].name`	text		up to 32 characters	Name: The asset's name in words, under the symbol.
`clipData.assets[].reserves`	text	yes	up to 28 characters	Reserves: What the exchange holds, with its unit, as shown.
`clipData.assets[].balances`	text	yes	up to 28 characters	Customer balances: What customers are owed, with its unit, as shown.
`clipData.assets[].ratio`	number	yes	4 decimals	Ratio: The ratio of reserves to customer balances, with the decimals you want shown, such as 101.07 for 101.07%.
`clipData.note`	text		up to 140 characters	Note: One line on how the proof was made, under who attested it.
`clipData.cta`	group			Call to action: The button at the end and the line under it, such as a web address, a handle or a phone number.
`clipData.cta.label`	text	yes	up to 28 characters	Button: What the button says.
`clipData.cta.detail`	text		up to 48 characters	Line under it: An address, a handle, an app, a phone number.
`clipData.riskWarning`	text	yes	up to 400 characters	Risk warning: The risk warning your regulator asks for, shown in the risk panel from the first frame to the last. A long warning is set smaller, never cut.
`clipData.notAdvice`	text	yes	up to 160 characters	Not advice: The line saying a proof is a statement and not advice, under the risk warning from the first frame to the last.
`clipData.disclaimer`	text		up to 160 characters	Small print: Any other line that must be shown, above your brand's footer line.
`clipData.look`	group			Look: How the clip looks and moves. The same six switches in every format (theme, pace, corners, alignment, logo, logo size). Leave any out for the package's default: the brand's colours, standard pace, square corners, text at the start.
`clipData.look.theme`	enum		`brand`, `light`, `dark`, `bold`	Theme: Brand: your brand's own colours and background. Light or dark: a page tinted with your brand colour. Bold: your brand colour as the page.
`clipData.look.pace`	enum		`calm`, `standard`, `punchy`	Pace: How things arrive: calm fades, a standard rhythm, or punchy slams and hard cuts.
`clipData.look.corners`	enum		`square`, `soft`, `round`	Corners: The shape of cards, pictures and buttons.
`clipData.look.align`	enum		`start`, `centre`	Text alignment: Where the text lines up.
`clipData.look.logo`	enum		`auto`, `free`	Logo: The style's own: the logo on a small plate so it reads on any page. As it is: the logo whole, with no plate, frame or crop, for a logo made to stand on the page, such as one with a transparent background. As it is, make sure your logo reads on the page of the theme you choose.
`clipData.look.logoSize`	enum		`auto`, `small`, `large`	Logo size: Standard is the style's own size. Small draws the logo a fifth smaller, with its plate. Large draws it a quarter larger wherever the style has room for it, and at the standard size where it has none.
`metaData`	group			Meta data: Everything about the post that is never drawn in the clip: its title, its description in four lengths, one per kind of platform, and its hashtags. Reelwire adds the brand's description, link and hashtags after it. Left out, the post text is generated from the clip data.
`metaData.title`	text		up to 100 characters	Title: Used where the platform has a title of its own: Facebook Feed, LinkedIn, Pinterest and YouTube. Up to 100 characters, which every one of them takes.
`metaData.captionTiny`	text		up to 200 characters	Tiny description (Pinterest, Threads, X): Up to 200 characters. The brand's description, link and hashtags follow it within the platform's limit.
`metaData.captionShort`	text		up to 500 characters	Short description (Telegram, Threema, WeChat, WhatsApp): Up to 500 characters. The brand's description, link and hashtags follow it within the platform's limit.
`metaData.captionMedium`	text		up to 1500 characters	Medium description (Discord, Facebook Reels, Instagram, LinkedIn, Signal, Slack, TikTok): Up to 1500 characters. The brand's description, link and hashtags follow it within the platform's limit.
`metaData.captionLong`	text		up to 4000 characters	Long description (Facebook Feed, YouTube): Up to 4000 characters. The brand's description, link and hashtags follow it within the platform's limit.
`metaData.hashtags`	list		up to 15	Hashtags: Written without the #. Up to 15, which every platform takes.
`metaData.hashtags[]`	text		up to 60 characters	Hashtag

locales carries other languages: under each language code, the parts of clipData and metaData that differ, laid over the default, so a language with no copy still renders.

A picture is always a file from your media library: media:// followed by its id or its name. Anything the table does not list is refused, and so is anything over its limit, with a 400 schema_validation error that names the field.

Ask Reelwire for the whole JSON Schema, the document your content is checked against, without signing in:

curl "https://app.reelwire.io/v1/formats/template/tpl_20eb67de501a?variant=Proof%20of%20reserves&version=1.0.0"

Delivery JSON

Your own system sends this to one of your streams, POST /v1/stream, and every channel listening to that stream draws it with its template. data is the document described above; a stream with an empty field map passes it to the template unchanged. Try it first on POST /v1/stream/validate, which answers the same without publishing anything. Streams and feeds explains the rest, including how to map a document of your own shape instead.

{
  "streamId": "st_your_stream_id",
  "eventId": "01M2SQMKK3G1NVFXV31DCBVB95",
  "occurredAt": "2026-09-23T07:00:00Z",
  "locale": "en",
  "data": {
    "clipData": {
      "tag": "Proof of reserves",
      "stamp": "Audited",
      "headline": "Reserves cover customer balances in all six assets",
      "asOfLabel": "As of",
      "asOf": "30 September 2026, 23:59 UTC",
      "attestedByLabel": "Attested by",
      "attestedBy": "Northgate Assurance LLP, independent auditor",
      "assetsLabel": "Reserves against customer balances",
      "reservesLabel": "Reserves",
      "balancesLabel": "Customer balances",
      "ratioUnit": "%",
      "assets": [
        {
          "name": "Bitcoin",
          "ratio": 101.07,
          "symbol": "BTC",
          "balances": "21,210.88 BTC",
          "reserves": "21,437.52 BTC"
        },
        {
          "name": "Ether",
          "ratio": 101.01,
          "symbol": "ETH",
          "balances": "309,771.40 ETH",
          "reserves": "312,904.18 ETH"
        },
        {
          "name": "Tether",
          "ratio": 100.53,
          "symbol": "USDT",
          "balances": "1,198,200,000 USDT",
          "reserves": "1,204,550,000 USDT"
        },
        {
          "name": "USD Coin",
          "ratio": 100.25,
          "symbol": "USDC",
          "balances": "842,990,115 USDC",
          "reserves": "845,120,330 USDC"
        },
        {
          "name": "Solana",
          "ratio": 100.4,
          "symbol": "SOL",
          "balances": "4,861,002.4 SOL",
          "reserves": "4,880,215.9 SOL"
        },
        {
          "name": "XRP",
          "ratio": 100.22,
          "symbol": "XRP",
          "balances": "611,050,000 XRP",
          "reserves": "612,400,000 XRP"
        }
      ],
      "note": "Holdings on public addresses were checked against the customer ledger.",
      "cta": {
        "label": "Read the full report",
        "detail": "halcyon.example/reserves"
      },
      "riskWarning": "Don't invest unless you're prepared to lose all the money you invest. This is a high-risk investment and you should not expect to be protected if something goes wrong.",
      "notAdvice": "A proof of reserves is a statement of holdings at one date, not a guarantee of the future or investment advice.",
      "disclaimer": "",
      "look": {
        "logo": "auto",
        "pace": "standard",
        "align": "start",
        "theme": "brand",
        "corners": "square",
        "logoSize": "auto"
      }
    },
    "metaData": {
      "title": "Proof of reserves, 30 September 2026: every asset covered, attested by Northgate Assurance",
      "captionTiny": "Our proof of reserves at 30 Sep 2026: every asset held at 100.22% or more of customer balances. Crypto is high risk.",
      "captionShort": "Proof of reserves at 30 September 2026, 23:59 UTC, attested by Northgate Assurance LLP: reserves against customer balances in six assets, from 100.22% (XRP) to 101.07% (BTC). A statement of holdings at one date, not a guarantee. Don't invest unless you're prepared to lose all the money you invest.",
      "captionMedium": "Proof of reserves at 30 September 2026, 23:59 UTC, attested by Northgate Assurance LLP, our independent auditor. Holdings on public addresses were checked against the customer ledger for six assets: BTC 101.07%, ETH 101.01%, USDT 100.53%, USDC 100.25%, SOL 100.40% and XRP 100.22%. The full report is on our website. A proof of reserves is a statement of holdings at one date, not a guarantee of the future or investment advice. Don't invest unless you're prepared to lose all the money you invest. This is a high-risk investment and you should not expect to be protected if something goes wrong.",
      "captionLong": "Proof of reserves at 30 September 2026, 23:59 UTC, attested by Northgate Assurance LLP, our independent auditor. Holdings on public addresses were checked against the customer ledger for six assets. Bitcoin: 21,437.52 BTC held against 21,210.88 BTC owed, a ratio of 101.07%. Ether: 312,904.18 ETH against 309,771.40 ETH, 101.01%. Tether: 1,204,550,000 USDT against 1,198,200,000 USDT, 100.53%. USD Coin: 845,120,330 USDC against 842,990,115 USDC, 100.25%. Solana: 4,880,215.9 SOL against 4,861,002.4 SOL, 100.40%. XRP: 612,400,000 XRP against 611,050,000 XRP, 100.22%. The full report and the method are on our website. A proof of reserves is a statement of holdings at one date, not a guarantee of the future or investment advice. Don't invest unless you're prepared to lose all the money you invest. This is a high-risk investment and you should not expect to be protected if something goes wrong.",
      "hashtags": [
        "proofofreserves",
        "crypto",
        "transparency",
        "cryptoexchange",
        "audit"
      ]
    }
  }
}

The delivery names no version: which build draws it is the channel's choice, the newest of its variant or the one it is pinned to. eventId is a ULID you make once per event: sending the same one again changes nothing. occurredAt is when the thing happened, not when you sent it. locale is the language of the text in data, and data.locales carries other languages beside it.

Example video​

What it accepts​

Delivery JSON​

Example video

What it accepts

Delivery JSON