Convocation
type: MusicGroup
genre: doom metal
genre: sludge metal
description: thumb|300px|right|Student receiving an academic degree during convocation. A convocation (from Latin convocare 'to call/come together', a rough calque of Greek ἐκκλησία ekklēsia) is a group of people
popularity: 3
followers: 3284
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSCanonicalRecord
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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  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cb02492ab1e6d649e7208b708c68aabdabae9e8c38d322c62f590742acaabc. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e61699b7-b16c-4fde-bcc0-647927093cc2.json and https://artists.proofprofile.net/proofs/artist/e61699b7-b16c-4fde-bcc0-647927093cc2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
album: Scars Across
  type: MusicAlbum
  date published: 2018-03-30
album: Ashes Coalesce
  type: MusicAlbum
  date published: 2020-07-03
album: Graveless yet Dead
  type: MusicAlbum
  date published: 2023-10-04
album: Lepers and Derelicts
  type: MusicAlbum
  date published: 2023-10-31
album: No Dawn for the Caliginous Night
  type: MusicAlbum
  date published: 2023-11-24
album: Empty Room
  type: MusicAlbum
  date published: 2025-10-01
  track: Empty Room
    type: MusicRecording
    duration: PT8M58S
    duration ms: 538240
    explicit: false
    by artist: Convocation
    in album: Empty Room
      type: MusicAlbum
      date published: 2025-10-01
    genre: doom metal
    genre: sludge metal
    isrc code: USL4R2564718
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    additional property: OTSBitcoinBlockVerifyURL
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    additional property: OTSVerificationAPI
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      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2564718
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T06:56:49Z
    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 0x2995b52d1aef1c396c4488514b537cafebf373104c4c9bb528c1fdc91cc793b8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4R2564718.
      date published: 2026-07-06T06:56:49Z
    audio: Empty Room
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.907
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
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      additional property: Acousticness
        type: PropertyValue
        value: 0
      additional property: Instrumentalness
        type: PropertyValue
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      additional property: Liveness
        type: PropertyValue
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.771
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
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