Featherweight
type: MusicGroup
genre: metalcore
genre: post-hardcore
description: Featherweight is a weight class in the combat sports of boxing, kickboxing, mixed martial arts, and Greco-Roman wrestling. Boxing Professional boxing History A featherweight boxer weighs in at a li
popularity: 6
followers: 3558
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-06-17T08:11:48Z
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 0xccea3145008ba9ac2a388ecc9e7abc97578e6737a6ab40a1d859995f58ca5b5a. 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/6b055563-495f-4860-aac8-df072831cd4d.json and https://artists.proofprofile.net/proofs/artist/6b055563-495f-4860-aac8-df072831cd4d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
album: This is Heartbreak
  type: MusicAlbum
  date published: 2019-06-03
album: Rupture
  type: MusicAlbum
  date published: 2019-07-24
album: Silverback
  type: MusicAlbum
  date published: 2019-08-22
album: Gone too long
  type: MusicAlbum
  date published: 2019-09-09
album: Sleep Well
  type: MusicAlbum
  date published: 2019-10-11
album: Sleep Well
  type: MusicAlbum
  date published: 2019-10-11
album: In Ember
  type: MusicAlbum
  date published: 2020-10-22
  track: In Ember
    type: MusicRecording
    duration: PT4M10S
    duration ms: 250250
    explicit: false
    by artist: Featherweight
    in album: In Ember
      type: MusicAlbum
      date published: 2020-10-22
    genre: metalcore
    genre: post-hardcore
    isrc code: QZ8252040742
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
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      type: PropertyValue
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T04:47:21Z
    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 0x150d8453b4fad8e4b67ea1b4729b9a5fbac5b931c68055bedcdf83b86b251613. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ8252040742.
      date published: 2026-07-05T04:47:21Z
    audio: In Ember
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 97.501
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      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
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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)
        type: PropertyValue
        value: -3.996
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
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album: New Gloom
  type: MusicAlbum
  date published: 2022-11-03
album: New Gloom
  type: MusicAlbum
  date published: 2022-11-03
album: Solace
  type: MusicAlbum
  date published: 2023-07-14
album: Solace
  type: MusicAlbum
  date published: 2023-07-14
album: Where Struggle Begins
  type: MusicAlbum
  date published: 2024-05-24
album: Where Struggle Begins
  type: MusicAlbum
  date published: 2024-05-24
album: Echo
  type: MusicAlbum
  date published: 2025-01-22
  track: Echo
    type: MusicRecording
    duration: PT4M14S
    duration ms: 254200
    explicit: false
    by artist: Featherweight
    in album: Echo
      type: MusicAlbum
      date published: 2025-01-22
    genre: metalcore
    genre: post-hardcore
    isrc code: QZZEC2422051
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    additional property: CopyrightStatus
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
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    additional property: OTSVerificationAPI
      type: PropertyValue
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T10:54:45Z
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Echo
album: On The Fence Leaning Happy
album: The Frost Spoke Like God

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67b9949f2587386ef0e92662a8e798fc3ee6847d03343fda4541eb06780848a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:54:45Z), 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/QZZEC2422051.
date published: 2026-07-20T10:54:45Z

Echo
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 124.976
additional property: Musical Key
  type: PropertyValue
  value: 6
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.509
additional property: Energy
  type: PropertyValue
  value: 0.985
additional property: Speechiness
  type: PropertyValue
  value: 0.096
additional property: Acousticness
  type: PropertyValue
  value: 0
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.39
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.22
additional property: Loudness (dB)
  type: PropertyValue
  value: -3.053
additional property: Key Name
  type: PropertyValue
  value: F#
additional property: Mode Name
  type: PropertyValue
  value: Minor

On The Fence Leaning Happy
type: MusicAlbum
date published: 2025-07-08

The Frost Spoke Like God
type: MusicAlbum
date published: 2025-09-19