Johan Anker
type: MusicGroup
description: Johan August Anker (26 June 1871 – 2 October 1940) was a Norwegian sailor and yacht designer who competed in the 1908 Summer Olympics, in the 1912 Summer Olympics, and in the 1928 Summer Olympics. Pe
popularity: 4
followers: 425
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xce0357df1d1aed1d6df61f981f824932809a68123d3b9d64d853962b1d76218c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954689
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954689
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e28195a8-a437-44db-a58a-abfe760c37bb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e28195a8-a437-44db-a58a-abfe760c37bb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e28195a8-a437-44db-a58a-abfe760c37bb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T10:35:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xce0357df1d1aed1d6df61f981f824932809a68123d3b9d64d853962b1d76218c","name":"Johan Anker","registered_at":"2026-06-21T07:17:15Z","symbol":"NIM1859256","token_address":"0x7bdabd79db7fb017a58e770e292970acad13200c","type":"artist","uuid":"e28195a8-a437-44db-a58a-abfe760c37bb"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0357df1d1aed1d6df61f981f824932809a68123d3b9d64d853962b1d76218c. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e28195a8-a437-44db-a58a-abfe760c37bb.json and https://artists.proofprofile.net/proofs/artist/e28195a8-a437-44db-a58a-abfe760c37bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T10:35:31Z
  text: {"copyright_id":"0xce0357df1d1aed1d6df61f981f824932809a68123d3b9d64d853962b1d76218c","name":"Johan Anker","registered_at":"2026-06-21T07:17:15Z","symbol":"NIM1859256","token_address":"0x7bdabd79db7fb017a58e770e292970acad13200c","type":"artist","uuid":"e28195a8-a437-44db-a58a-abfe760c37bb"}
album: Hoop & Bid
  type: MusicAlbum
  date published: 2017-08-25
album: My Arms
  type: MusicAlbum
  date published: 2020-03-26
album: Soldaat
  type: MusicAlbum
  date published: 2020-10-02
album: Soldaat
  type: MusicAlbum
  date published: 2020-10-02
album: Ek Belowe
  type: MusicAlbum
  date published: 2021-09-24
album: Die Seën
  type: MusicAlbum
  date published: 2022-11-04
  track: Die Seën
    type: MusicRecording
    duration: PT6M56S
    duration ms: 416500
    explicit: false
    by artist: Johan Anker
    in album: Die Seën
      type: MusicAlbum
      date published: 2022-11-04
    isrc code: ZADGR2200174
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
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    additional property: OTSHash
    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958650
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZADGR2200174
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T03:36:41Z
    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 0x4c59560c3ef86125f6d0fe04038d11e0d65bd835a0eaf6e5f9221a8750aa6e83. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ZADGR2200174.
      date published: 2026-07-19T03:36:41Z
    audio: Die Seën
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 140.006
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.43
      additional property: Energy
        type: PropertyValue
        value: 0.698
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.389
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.091
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.11
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.229
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Briefie vir Kersfees
  type: MusicAlbum
  date published: 2024-11-08