Matthew Check
type: MusicGroup
popularity: 6
followers: 239
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additional property: CopyrightChainExplorerURL
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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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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf844f79aaf80cb0775871be19cea55bed2ced60adc84c7fea01757150ae0ac0a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8275ca6c-80b3-47fe-a09c-e306e71e6e8c.json and https://artists.proofprofile.net/proofs/artist/8275ca6c-80b3-47fe-a09c-e306e71e6e8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
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album: The Amazing Worth
  type: MusicAlbum
  date published: 2008
album: The Amazing Worth
  type: MusicAlbum
  date published: 2008
album: Back to Sleep
  type: MusicAlbum
  date published: 2008
album: The November Album
  type: MusicAlbum
  date published: 2013
album: Sometimes a Woman
  type: MusicAlbum
  date published: 2013
album: Couple of Reasons
  type: MusicAlbum
  date published: 2013
album: The Condesa Queen
  type: MusicAlbum
  date published: 2020-12-11
album: Tattoo
  type: MusicAlbum
  date published: 2022-02-10
album: Okay with It
  type: MusicAlbum
  date published: 2022-02-24
album: The Last Song
  type: MusicAlbum
  date published: 2022-03-11
album: The Bridgeford Sessions
  type: MusicAlbum
  date published: 2022-03-11
album: Back in 99
  type: MusicAlbum
  date published: 2022-05-05
album: Sisters (Live)
  type: MusicAlbum
  date published: 2022-05-13
album: Live @ Rockwood Music Hall
  type: MusicAlbum
  date published: 2022-05-20
album: The Very Beginning
  type: MusicAlbum
  date published: 2022-08-04
album: The Way That You Are
  type: MusicAlbum
  date published: 2022-09-01
album: Old Wooden Floor
  type: MusicAlbum
  date published: 2022-09-15
album: Without a Throne
  type: MusicAlbum
  date published: 2022-09-30
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    duration: PT5M11S
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    explicit: true
    by artist: Matthew Check
    in album: Without a Throne
      type: MusicAlbum
      date published: 2022-09-30
    isrc code: QZHZ52214229
    additional property: CopyrightID
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    additional property: OTSTimestamp
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      value: 2026-07-19T18:06:22Z
    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 0xfc0626f6e6f0d06a2ad10d59469c48c81a181e637aff1d4351827192e4f5acaa. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:22Z), 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/QZHZ52214229.
      date published: 2026-07-19T18:06:22Z
    audio: The Very Beginning
      type: AudioObject
      additional property: Tempo (BPM)
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        value: 121.129
      additional property: Musical Key
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
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      additional property: Speechiness
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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: -7.704
      additional property: Key Name
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        value: C
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  track: Because You Can
    type: MusicRecording
    duration: PT3M47S
    duration ms: 227947
    explicit: false
    by artist: Matthew Check
    in album: Without a Throne
      type: MusicAlbum
      date published: 2022-09-30
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    additional property: CopyrightStatus
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    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Because You Can
album: Dead Flowers (Live)
album: On My Mind (Live)
album: Tattoo (Live)
album: Further and Further (Live)
album: What a Father Would Do (Absalom) [Live]
album: Live in 2022
album: Live @ The Bitter End
album: Sterling
album: Old Fashioned
album: At Least For Now
album: Mizmor L'David
album: L'kha Dodi
album: Joey (Live)
album: Drops of Rain (Acoustic Version)
album: Two Songs

OTSVerificationAPI
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value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ52223931

OTSTimestamp
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value: 2026-07-04T14:03:39Z

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 0x18948e7e6859d0613134c6f933c4c95a7794be622b354199fb1e00b09fa8bc11. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHZ52223931.
date published: 2026-07-04T14:03:39Z

Because You Can
type: AudioObject
additional property: Tempo (BPM)
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  value: 163.558
additional property: Musical Key
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additional property: Mode (Major/Minor)
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  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.557
additional property: Energy
  type: PropertyValue
  value: 0.724
additional property: Speechiness
  type: PropertyValue
  value: 0.033
additional property: Acousticness
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additional property: Instrumentalness
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additional property: Liveness
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additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.533
additional property: Loudness (dB)
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  value: -9.384
additional property: Key Name
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  value: D
additional property: Mode Name
  type: PropertyValue
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Dead Flowers (Live)
type: MusicAlbum
date published: 2023-04-07

On My Mind (Live)
type: MusicAlbum
date published: 2023-04-28

Tattoo (Live)
type: MusicAlbum
date published: 2023-05-12

Further and Further (Live)
type: MusicAlbum
date published: 2023-05-26

What a Father Would Do (Absalom) [Live]
type: MusicAlbum
date published: 2023-05-31

Live in 2022
type: MusicAlbum
date published: 2023-06-02

Live @ The Bitter End
type: MusicAlbum
date published: 2023-08-24

Sterling
type: MusicAlbum
date published: 2023-10-20

Old Fashioned
type: MusicAlbum
date published: 2023-11-10

The Way That You Are
type: MusicAlbum
date published: 2023-12-01

At Least For Now
type: MusicAlbum
date published: 2023-12-22

Mizmor L'David
type: MusicAlbum
date published: 2024-04-11

L'kha Dodi
type: MusicAlbum
date published: 2024-04-11

Joey (Live)
type: MusicAlbum
date published: 2025-08-19

Drops of Rain (Acoustic Version)
type: MusicAlbum
date published: 2025-08-19

Two Songs
type: MusicAlbum
date published: 2025-08-20