Unverkalt
type: MusicGroup
genre: sludge metal
popularity: 6
followers: 1399
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x90cb8d6f8232fbf050ba192c97a12aff1cef9503cb6b12d06f5c0c5d77c72242
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954717
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954717
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f637098a-e548-4a14-bf2e-010df25bb46c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f637098a-e548-4a14-bf2e-010df25bb46c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f637098a-e548-4a14-bf2e-010df25bb46c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T15:47:51Z
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 0x90cb8d6f8232fbf050ba192c97a12aff1cef9503cb6b12d06f5c0c5d77c72242. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f637098a-e548-4a14-bf2e-010df25bb46c.json and https://artists.proofprofile.net/proofs/artist/f637098a-e548-4a14-bf2e-010df25bb46c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T15:47:51Z
album: The Boundary
  type: MusicAlbum
  date published: 2020-07-17
album: The Boundary
  type: MusicAlbum
  date published: 2020-07-17
album: Solitude II
  type: MusicAlbum
  date published: 2020-09-26
album: L'origine du monde
  type: MusicAlbum
  date published: 2020-11-20
  track: Les fleurs de la vanité
    type: MusicRecording
    duration: PT6M32S
    duration ms: 392586
    explicit: false
    by artist: Unverkalt
    in album: L'origine du monde
      type: MusicAlbum
      date published: 2020-11-20
    genre: sludge metal
    isrc code: USL4R2014866
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T06:03:20+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x391949b61db4f4c71726a96d05861ac090ea726bcb5d5c05b71a2945fc87af99
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958110
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958110
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2014866
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T06:57:12Z
    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 0x391949b61db4f4c71726a96d05861ac090ea726bcb5d5c05b71a2945fc87af99. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USL4R2014866.
      date published: 2026-07-15T06:57:12Z
    audio: Les fleurs de la vanité
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 99.966
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.423
      additional property: Energy
        type: PropertyValue
        value: 0.833
      additional property: Speechiness
        type: PropertyValue
        value: 0.041
      additional property: Acousticness
        type: PropertyValue
        value: 0
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.945
      additional property: Liveness
        type: PropertyValue
        value: 0.213
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.068
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.261
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: L'origine du monde
  type: MusicAlbum
  date published: 2020-11-20
album: Loathe & Love
  type: MusicAlbum
  date published: 2023-05-30
album: Loathe & Love
  type: MusicAlbum
  date published: 2023-05-30
album: Le Triomphe de la Mort
  type: MusicAlbum
  date published: 2023-08-25
album: Le Triomphe de la Mort
  type: MusicAlbum
  date published: 2023-08-25
album: A Lump of Death: A Chaos of Dead Lovers
  type: MusicAlbum
  date published: 2023-10-20
album: A Lump of Death: A Chaos of Dead Lovers
  type: MusicAlbum
  date published: 2023-10-20
  track: Loathe & Love
    type: MusicRecording
    duration: PT7M0S
    duration ms: 420000
    explicit: false
    by artist: Unverkalt
    in album: A Lump of Death: A Chaos of Dead Lovers
      type: MusicAlbum
      date published: 2023-10-20
    genre: sludge metal
    isrc code: USA2P2326928
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T06:32:27+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x253db8fc43608f08c1963ee31d536b872b0aaa24740415bdec5b07f25453223d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959107
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959107
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2326928
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T07:19:23Z
    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 0x253db8fc43608f08c1963ee31d536b872b0aaa24740415bdec5b07f25453223d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USA2P2326928.
      date published: 2026-07-22T07:19:23Z
    audio: Loathe & Love
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 89.996
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
      additional property: Time Signature
      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Mode (Major/Minor)
type: PropertyValue
value: 0

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.331

Energy
type: PropertyValue
value: 0.65

Speechiness
type: PropertyValue
value: 0.031

Acousticness
type: PropertyValue
value: 0

Instrumentalness
type: PropertyValue
value: 0.642

Liveness
type: PropertyValue
value: 0.343

Valence (Positivity)
type: PropertyValue
value: 0.037

Loudness (dB)
type: PropertyValue
value: -8.409

Key Name
type: PropertyValue
value: F#

Mode Name
type: PropertyValue
value: Minor