Matthew James Hemmer
type: MusicGroup
popularity: 8
followers: 658
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: OTSRecordURL
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additional property: OTSVerificationAPI
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32f263c946d77ccec1731bdb84515d85298164fb9b940454606a48b233c02f1. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2657a1c-5e60-40c2-8378-cba067a19a78.json and https://artists.proofprofile.net/proofs/artist/d2657a1c-5e60-40c2-8378-cba067a19a78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
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  type: MusicAlbum
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album: Freestyle (v. TRIIIPIIIN)
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  date published: 2019-11-15
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  date published: 2019-12-12
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album: im here to take u home
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album: back2back2back (REMIX)
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album: whatever
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album: SYMPHONY
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album: drink til the morning
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album: by my side
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album: I FEEL LIKE GOD
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album: IE GOD
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album: MISTAKES
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  date published: 2020-06-06
album: OASIS
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album: THE CITY
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  date published: 2020-07-26
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  date published: 2020-08-14
album: GUESS
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  date published: 2020-08-28
album: savemylife
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album: GOODNIGHT
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  date published: 2021-07-17
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  date published: 2021-08-12
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album: nightfall
album: FALL
album: DARKER
album: PRIME
album: SADBOY

APHRODITE
type: MusicAlbum
date published: 2022-02-14

IDK
type: MusicAlbum
date published: 2022-03-03

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type: MusicAlbum
date published: 2022-03-22

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type: MusicAlbum
date published: 2022-04-22

SMILE
type: MusicAlbum
date published: 2022-05-17

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type: MusicAlbum
date published: 2022-05-27

nightfall
type: MusicAlbum
date published: 2022-08-05

FALL
type: MusicAlbum
date published: 2022-09-09

DARKER
type: MusicAlbum
date published: 2022-10-28

PRIME
type: MusicAlbum
date published: 2022-11-24

SADBOY
type: MusicAlbum
date published: 2023-02-14

FIXED
type: MusicAlbum
date published: 2023-03-26

unowhere2findme
type: MusicAlbum
date published: 2023-04-24

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date published: 2023-05-23

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type: MusicAlbum
date published: 2023-06-16

BTRL8THNVR (Part I: FALL)
type: MusicAlbum
date published: 2023-07-17

DRAIN
type: MusicAlbum
date published: 2023-10-01

NOOSE
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date published: 2023-11-11

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MINE
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CRUSH
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Interlude (v. UNINSTALLPOKEMONVIOLENT)
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date published: 2024-05-27

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date published: 2024-06-07

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type: MusicAlbum
date published: 2024-09-06

CONFLICTED
type: MusicAlbum
date published: 2024-09-27

DAMSEL
type: MusicAlbum
date published: 2024-11-11

HELPLESS
type: MusicAlbum
date published: 2025-01-01

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type: MusicAlbum
date published: 2025-01-24

Dis N Dat
type: MusicAlbum
date published: 2025-02-14

SENTIMENTAL
type: MusicAlbum
date published: 2025-05-02

GREATNESS
type: MusicAlbum
date published: 2025-06-03

Interlude (v. all e-girls end up in heaven)
type: MusicAlbum
date published: 2025-06-10

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date published: 2025-07-11

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date published: 2025-08-08

SOUNDCHECK
type: MusicAlbum
date published: 2025-09-19

SHE SAID
type: MusicAlbum
date published: 2025-10-10