Mgła
type: MusicGroup
genre: black metal
description: thumb|Logo Mgła (; ; ) is a Polish black metal band from Kraków, formed in 2000. The duo consists of vocalist, guitarist and bassist M. (Mikołaj Żentara) and drummer Darkside (Maciej Kowalski). The
popularity: 42
followers: 159921
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  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-12T19:28:13Z
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album: Presence
  type: MusicAlbum
  date published: 2006-01-30
album: Mdłości
  type: MusicAlbum
  date published: 2006-09-03
album: Further Down the Nest
  type: MusicAlbum
  date published: 2007-06-19
album: Groza
  type: MusicAlbum
  date published: 2008-08-13
album: With Hearts Toward None
  type: MusicAlbum
  date published: 2012-02-28
album: Exercises in Futility
  type: MusicAlbum
  date published: 2015-11-04
album: Age of Excuse
  type: MusicAlbum
  date published: 2019-09-03
album: Torn Aether (live recordings 2013-2022)
  type: MusicAlbum
  date published: 2024-11-21
  track: Age of Excuse III - live in Skopje 2019
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    by artist: Mgła
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      type: MusicAlbum
      date published: 2024-11-21
    genre: black metal
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    additional property: OTSVerifyInstructions
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      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-12T20:39:38Z
    audio: Age of Excuse III - live in Skopje 2019
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  track: With Hearts Toward None III - live in Brussels 2013
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    by artist: Mgła
    in album: Torn Aether (live recordings 2013-2022)
      type: MusicAlbum
      date published: 2024-11-21
    genre: black metal
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    additional property: OTSVerifyInstructions
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      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-12T20:41:42Z
    audio: With Hearts Toward None III - live in Brussels 2013
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  track: Exercises in Futility II - live in London 2022
  track: With Hearts Toward None I - live in Paris 2022
  track: Groza III - live in Vilnius 2017
  track: Exercises in Futility I - live in London 2015
  track: Further Down the Nest II - live in Wroclaw 2019
  track: Mdlosci I - live in Neustadt an der Orla 2013
  track: Exercises in Futility III - live in Warszawa 2017
  track: With Hearts Toward None IV - live in Arnhem 2013
  track: Further Down the Nest I - live in Munich 2016
  track: Age of Excuse V - live in Tampere 2022
  track: Age of Excuse IV - live in Milton Keynes 2022
  track: Exercises in Futility V - live in Barcelona 2019
  track: Age of Excuse VI - live in Aarburg 2022
  track: Exercises in Futility IV - live in Sundsvall 2022
  track: With Hearts Toward None VII - live in Toulouse 2019
  track: Exercises in Futility VI - live in Aleksandrow Lodzki 2021
album: World-without-us

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Valence (Positivity)
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Mode Name
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Exercises in Futility II - live in London 2022
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duration: PT6M43S
duration ms: 403880
explicit: true
by artist: Mgła
in album: Torn Aether (live recordings 2013-2022)
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  date published: 2024-11-21
genre: black metal
isrc code: GX5MY2406209
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-14T22:55:31Z
audio: Exercises in Futility II - live in London 2022
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With Hearts Toward None I - live in Paris 2022
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duration: PT4M33S
duration ms: 273586
explicit: true
by artist: Mgła
in album: Torn Aether (live recordings 2013-2022)
  type: MusicAlbum
  date published: 2024-11-21
genre: black metal
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-12T20:41:42Z
audio: With Hearts Toward None I - live in Paris 2022
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Groza III - live in Vilnius 2017
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duration: PT5M39S
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by artist: Mgła
in album: Torn Aether (live recordings 2013-2022)
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  date published: 2024-11-21
genre: black metal
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-03T19:59:51Z
audio: Groza III - live in Vilnius 2017
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Exercises in Futility I - live in London 2015
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duration: PT6M58S
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  date published: 2024-11-21
genre: black metal
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-16T08:19:47Z
audio: Exercises in Futility I - live in London 2015
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Further Down the Nest II - live in Wroclaw 2019
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-04T02:23:20Z
audio: Further Down the Nest II - live in Wroclaw 2019
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Mdlosci I - live in Neustadt an der Orla 2013
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-16T07:22:18Z
audio: Mdlosci I - live in Neustadt an der Orla 2013
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Exercises in Futility III - live in Warszawa 2017
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-17T19:12:23Z
audio: Exercises in Futility III - live in Warszawa 2017
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With Hearts Toward None IV - live in Arnhem 2013
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-20T07:01:21Z
audio: With Hearts Toward None IV - live in Arnhem 2013
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Further Down the Nest I - live in Munich 2016
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-04T11:19:20Z
audio: Further Down the Nest I - live in Munich 2016
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Age of Excuse V - live in Tampere 2022
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-16T20:12:32Z
audio: Age of Excuse V - live in Tampere 2022
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Age of Excuse IV - live in Milton Keynes 2022
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-16T20:12:32Z
audio: Age of Excuse IV - live in Milton Keynes 2022
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Exercises in Futility V - live in Barcelona 2019
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Age of Excuse VI - live in Aarburg 2022
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Exercises in Futility IV - live in Sundsvall 2022
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With Hearts Toward None VII - live in Toulouse 2019
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Exercises in Futility VI - live in Aleksandrow Lodzki 2021
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World-without-us
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date published: 2025-09-04