Siege Perilous
type: MusicGroup
genre: power metal
genre: speed metal
description: thumb|upright=1.32|Sir Galahad takes the Siege Perilous at the Round Table, in a 15th-century illustration In Arthurian legend, the Siege Perilous (, also known as The Perilous Seat, ) is a vacant sea
popularity: 3
followers: 493
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
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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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e93078b55f3a624f0701a9d7b3b84c5ad1ddcbc90dcda9cfa011c04e26d7021. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cf89961-8d4a-4479-a54e-9b7bb3025cfc.json and https://artists.proofprofile.net/proofs/artist/5cf89961-8d4a-4479-a54e-9b7bb3025cfc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
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  date published: 2022-10-14
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album: Ereshkigal
  type: MusicAlbum
  date published: 2025-09-12
  track: Ereshkigal
    type: MusicRecording
    duration: PT5M15S
    duration ms: 315814
    explicit: false
    by artist: Siege Perilous
    in album: Ereshkigal
      type: MusicAlbum
      date published: 2025-09-12
    genre: power metal
    genre: speed metal
    isrc code: QZWFV2590211
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    additional property: OTSBitcoinBlockVerifyURL
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    additional property: OTSVerificationAPI
      type: PropertyValue
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    additional property: OTSTimestamp
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      value: 2026-07-03T21:18:05Z
    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 0x211e988a741ed73c5433b0d841cdc919319bb8673747a56b556b38fae85c3d25. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFV2590211.
      date published: 2026-07-03T21:18:05Z
    audio: Ereshkigal
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Musical Key
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
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        value: 4
      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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        value: 0.05
      additional property: Acousticness
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      additional property: Instrumentalness
        type: PropertyValue
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      additional property: Liveness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
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      additional property: Key Name
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        value: A
      additional property: Mode Name
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