Helrunar
type: MusicGroup
genre: black metal
genre: folk metal
description: Helrunar is a German pagan metal band from Münster, founded in 2001. They played at the Summer Breeze Open Air in August 2007, and at the pagan metal Ragnarök Festival in 2008. Line-up Current member
popularity: 13
followers: 13042
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerifyInstructions
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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91b6ab05abacff1f3858cab3eff557dbd4368e8558ec8a8d3393c23e05ca313. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01274b7e-1063-4b06-80fb-56c91654d09d.json and https://artists.proofprofile.net/proofs/artist/01274b7e-1063-4b06-80fb-56c91654d09d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T04:52:46Z
album: Grátr
  type: MusicAlbum
  date published: 2003-05-08
album: Split
  type: MusicAlbum
  date published: 2005-05-29
album: Helrunar/Nachtmahr
  type: MusicAlbum
  date published: 2005-05-29
album: Frostnacht
  type: MusicAlbum
  date published: 2005-10-24
album: Frostnacht
  type: MusicAlbum
  date published: 2005-10-24
album: Frostnacht
  type: MusicAlbum
  date published: 2005-10-24
  track: Älter als das Kreuz
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    by artist: Helrunar
    in album: Frostnacht
      type: MusicAlbum
      date published: 2005-10-24
    genre: black metal
    genre: folk metal
    isrc code: DES560592008
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    additional property: CopyrightStatus
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4703c61e8e1effdd91da17b10adb4a4357fd623a8bccf44d4ae467fe1aff2853. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES560592008.
      date published: 2026-07-05T01:12:41Z
    audio: Älter als das Kreuz
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 183.462
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        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
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        value: 1
      additional property: Time Signature
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        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.157
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      additional property: Speechiness
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      additional property: Instrumentalness
        type: PropertyValue
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      additional property: Liveness
        type: PropertyValue
        value: 0.068
      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.637
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Baldr OK íss
  type: MusicAlbum
  date published: 2007-10-26
album: Baldr OK íss
  type: MusicAlbum
  date published: 2007-10-26
album: Baldr Ok Íss
  type: MusicAlbum
  date published: 2007-10-26
album: Grátr
  type: MusicAlbum
  date published: 2009-05-08
album: Gratr
  type: MusicAlbum
  date published: 2009-05-08
album: Sól
  type: MusicAlbum
  date published: 2011-01-07
album: Sól
  type: MusicAlbum
  date published: 2011-01-07
album: Sól
  type: MusicAlbum
  date published: 2011-01-07
album: Wein für Polyphem
  type: MusicAlbum
  date published: 2013-03-22
album: Wein für Polyphem
  type: MusicAlbum
  date published: 2013-03-22
album: Devils Devils Everywhere!
  type: MusicAlbum
  date published: 2015-01-26
album: Niederkunfft (Pre-Listening EP)
  type: MusicAlbum
  date published: 2015-02-20
album: Niederkunfft
  type: MusicAlbum
  date published: 2015-02-27
album: Niederkunfft
  type: MusicAlbum
  date published: 2015-02-27
album: Niederkunfft
  type: MusicAlbum
  date published: 2015-02-27
  track: Magdeburg brennt
    type: MusicRecording
    duration: PT5M18S
    duration ms: 318640
    explicit: false
    by artist: Helrunar
    in album: Niederkunfft
      type: MusicAlbum
      date published: 2015-02-27
    genre: black metal
    genre: folk metal
    isrc code: DES561497005
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    additional property: CopyrightStatus
      type: PropertyValue
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    additional property: OTSBitcoinBlock
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Magdeburg brennt
album: In Eis und Nacht
album: Blutmond
album: Vanitas Vanitatvm

CopyrightRegisteredAt
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value: 2026-07-21T00:57:53+00:00

CopyrightChainExplorerURL
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OTSHash
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OTSBitcoinBlock
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value: 958951

OTSBitcoinBlockVerifyURL
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value: https://blockstream.info/api/block-height/958951

OTSVerificationAPI
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value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES561497005

OTSTimestamp
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value: 2026-07-21T02:01:41Z

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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3e2a601fa0bb67fa1458072a3f8543443c42ccfc09b3e4036c863d65325c96. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES561497005.
date published: 2026-07-21T02:01:41Z

Magdeburg brennt
type: AudioObject
additional property: Tempo (BPM)
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  value: 160.091
additional property: Musical Key
  type: PropertyValue
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additional property: Mode (Major/Minor)
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additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.33
additional property: Energy
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additional property: Speechiness
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  value: 0.084
additional property: Acousticness
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additional property: Instrumentalness
  type: PropertyValue
  value: 0.757
additional property: Liveness
  type: PropertyValue
  value: 0.134
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.082
additional property: Loudness (dB)
  type: PropertyValue
  value: -6.257
additional property: Key Name
  type: PropertyValue
  value: D
additional property: Mode Name
  type: PropertyValue
  value: Major

In Eis und Nacht
type: MusicAlbum
date published: 2018-07-29

Blutmond
type: MusicAlbum
date published: 2018-08-30

Vanitas Vanitatvm
type: MusicAlbum
date published: 2018-09-28

Vanitas Vanitatvm
type: MusicAlbum
date published: 2018-09-28