Helike
type: MusicGroup
description: Helike (; , pronounced , modern ) was an ancient Greek polis or city-state that was submerged by a tsunami in the winter of 373 BC. It was located in the regional unit of Achaea, northern Peloponneso
popularity: 5
followers: 154
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc82aedff3602621fd7f789816d92dae4a96b5741b26bbac830109043995a43e7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bb9b3108-6e55-40b0-af32-32f14cf9f7df.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bb9b3108-6e55-40b0-af32-32f14cf9f7df.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bb9b3108-6e55-40b0-af32-32f14cf9f7df
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82aedff3602621fd7f789816d92dae4a96b5741b26bbac830109043995a43e7. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb9b3108-6e55-40b0-af32-32f14cf9f7df.json and https://artists.proofprofile.net/proofs/artist/bb9b3108-6e55-40b0-af32-32f14cf9f7df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:10:41Z
album: Symphonic Sphere
  type: MusicAlbum
  date published: 2020-06-14
album: Sparkle of Your Smile
  type: MusicAlbum
  date published: 2020-06-29
  track: All is Forgiven
    type: MusicRecording
    duration: PT2M32S
    duration ms: 152571
    explicit: false
    by artist: Helike
    in album: Sparkle of Your Smile
      type: MusicAlbum
      date published: 2020-06-29
    isrc code: SE4RG2065203
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T20:53:04+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x124e30b835841c7aa126f6b4ff0c75fec4c6e5847939830ca0b2396db0f96bbf
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959058
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959058
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE4RG2065203
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T23:53:58Z
    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
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124e30b835841c7aa126f6b4ff0c75fec4c6e5847939830ca0b2396db0f96bbf. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:53:58Z), 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/SE4RG2065203.
      date published: 2026-07-21T23:53:58Z
    audio: All is Forgiven
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 72.541
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.192
      additional property: Energy
        type: PropertyValue
        value: 0.033
      additional property: Speechiness
        type: PropertyValue
        value: 0.044
      additional property: Acousticness
        type: PropertyValue
        value: 0.951
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.973
      additional property: Liveness
        type: PropertyValue
        value: 0.088
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.157
      additional property: Loudness (dB)
        type: PropertyValue
        value: -27.616
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
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  type: MusicAlbum
  date published: 2020-12-21
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  type: MusicAlbum
  date published: 2021-02-21
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  type: MusicAlbum
  date published: 2021-05-24
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  type: MusicAlbum
  date published: 2021-09-23
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  type: MusicAlbum
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  type: MusicAlbum
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  date published: 2022-08-27
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  type: MusicAlbum
  date published: 2022-11-04
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  type: MusicAlbum
  date published: 2022-12-25
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  type: MusicAlbum
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  type: MusicAlbum
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  type: MusicAlbum
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  type: MusicAlbum
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  type: MusicAlbum
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  type: MusicAlbum
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