OLPHEUS
type: MusicGroup
genre: melodic hardcore
genre: metalcore
genre: post-hardcore
popularity: 4
followers: 801
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xec08ca72d2e044adb7742af9e1cff42a46077f03fc030fee04f333d96fa7dd11
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dfae9c17-637a-43be-ae97-60ab9e236fa1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dfae9c17-637a-43be-ae97-60ab9e236fa1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/dfae9c17-637a-43be-ae97-60ab9e236fa1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
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 0xec08ca72d2e044adb7742af9e1cff42a46077f03fc030fee04f333d96fa7dd11. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfae9c17-637a-43be-ae97-60ab9e236fa1.json and https://artists.proofprofile.net/proofs/artist/dfae9c17-637a-43be-ae97-60ab9e236fa1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
album: Tsunagu
  type: MusicAlbum
  date published: 2017-09-09
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  type: MusicAlbum
  date published: 2017-09-09
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  type: MusicAlbum
  date published: 2019-10-04
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  date published: 2019-10-04
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  type: MusicAlbum
  date published: 2021-01-16
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  type: MusicAlbum
  date published: 2021-01-16
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  type: MusicAlbum
  date published: 2022-11-27
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  type: MusicAlbum
  date published: 2022-11-27
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  type: MusicAlbum
  date published: 2024-11-02
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  type: MusicAlbum
  date published: 2024-11-02