Natsumi Mizuki
type: MusicGroup
genre: enka
genre: kayokyoku
popularity: 9
followers: 542
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x70499f1181575ca7de12c7dce42f4a3663fcd8f610ff265a5107670cc67bf98a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4aa478c3-409a-423a-998b-4c53e5515998.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4aa478c3-409a-423a-998b-4c53e5515998.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4aa478c3-409a-423a-998b-4c53e5515998
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x70499f1181575ca7de12c7dce42f4a3663fcd8f610ff265a5107670cc67bf98a","name":"Natsumi Mizuki","registered_at":"2026-06-16T15:35:33Z","symbol":"NIM1096716","token_address":"0x7d4f4d892f4b1be4db0b3129a5b2335919f6b69f","type":"artist","uuid":"4aa478c3-409a-423a-998b-4c53e5515998"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70499f1181575ca7de12c7dce42f4a3663fcd8f610ff265a5107670cc67bf98a. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4aa478c3-409a-423a-998b-4c53e5515998.json and https://artists.proofprofile.net/proofs/artist/4aa478c3-409a-423a-998b-4c53e5515998.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x70499f1181575ca7de12c7dce42f4a3663fcd8f610ff265a5107670cc67bf98a","name":"Natsumi Mizuki","registered_at":"2026-06-16T15:35:33Z","symbol":"NIM1096716","token_address":"0x7d4f4d892f4b1be4db0b3129a5b2335919f6b69f","type":"artist","uuid":"4aa478c3-409a-423a-998b-4c53e5515998"}
album: 泣いてひとり旅
  type: MusicAlbum
  date published: 2013-05-22
album: 風未練/南国土佐を後にして
  type: MusicAlbum
  date published: 2014-06-04
album: 曽々木海岸/別れ月
  type: MusicAlbum
  date published: 2015-04-22
album: 筑波の風/寒緋桜
  type: MusicAlbum
  date published: 2016-01-27
album: なつみの数え唄
  type: MusicAlbum
  date published: 2016-05-25
album: 逢ってみたい人／うたつぐみ
  type: MusicAlbum
  date published: 2016-11-23
album: 帰って来やれ／雪の隠れ里
  type: MusicAlbum
  date published: 2017-08-23
album: 江差恋しぐれ
  type: MusicAlbum
  date published: 2018-04-25
album: みちのく恋唄/はちきん祭り歌
  type: MusicAlbum
  date published: 2019-02-27
album: 津軽の風笛
  type: MusicAlbum
  date published: 2019-08-21
album: きぬかけの路
  type: MusicAlbum
  date published: 2020-05-27
album: 恋紅
  type: MusicAlbum
  date published: 2021-06-23
album: くれない渡り鳥
  type: MusicAlbum
  date published: 2022-01-12
album: 玄海みれん
  type: MusicAlbum
  date published: 2022-06-08
album: あかつき情話
  type: MusicAlbum
  date published: 2023-05-24
album: 恋のパシュート
  type: MusicAlbum
  date published: 2023-07-05
album: 寒牡丹
  type: MusicAlbum
  date published: 2024-05-22
  track: 寒牡丹
    type: MusicRecording
    duration: PT4M47S
    duration ms: 287851
    explicit: false
    by artist: Natsumi Mizuki
    in album: 寒牡丹
      type: MusicAlbum
      date published: 2024-05-22
    genre: enka
    genre: kayokyoku
    isrc code: JPKI02411557
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T22:40:13+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa8b10300ff2aa3b61da67062e7add1785478e1b3b77e93e63c32f4659f65e9e6
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959076
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959076
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKI02411557
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T23:41:40Z
    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b10300ff2aa3b61da67062e7add1785478e1b3b77e93e63c32f4659f65e9e6. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/JPKI02411557.
      date published: 2026-07-21T23:41:40Z
    audio: 寒牡丹
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 121.983
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.54
      additional property: Energy
        type: PropertyValue
        value: 0.786
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.613
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.156
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.641
      additional property: Loudness (dB)
        type: PropertyValue
        value: -1.359
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: トラック野郎おとこ旅
    type: MusicRecording
    duration: PT3M37S
    duration ms: 217542
    explicit: false
    by artist: Natsumi Mizuki
    in album: 寒牡丹
      type: MusicAlbum
      date published: 2024-05-22
    genre: enka
    genre: kayokyoku
    isrc code: JPKI02411558
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T17:38:52+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9e22983adaaa2b3f423d372a405e4033b86f8bcf9bfb02a58ecc9d49da44101c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958180
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: トラック野郎おとこ旅
album: 水城なつみ 全曲集 ～寒牡丹～
album: 都会の流れ星

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958180

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKI02411558

OTSTimestamp
type: PropertyValue
value: 2026-07-15T17:59:52Z

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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e22983adaaa2b3f423d372a405e4033b86f8bcf9bfb02a58ecc9d49da44101c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/JPKI02411558.
date published: 2026-07-15T17:59:52Z

トラック野郎おとこ旅
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 122.004
additional property: Musical Key
  type: PropertyValue
  value: 5
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.555
additional property: Energy
  type: PropertyValue
  value: 0.861
additional property: Speechiness
  type: PropertyValue
  value: 0.041
additional property: Acousticness
  type: PropertyValue
  value: 0.675
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.055
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.789
additional property: Loudness (dB)
  type: PropertyValue
  value: -1.186
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
  value: Minor

水城なつみ 全曲集 ～寒牡丹～
type: MusicAlbum
date published: 2025-01-01

都会の流れ星
type: MusicAlbum
date published: 2025-06-11