Reba
type: MusicGroup
genre: vocaloid
popularity: 6
followers: 259
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1ed2e9741033a0d5eeaa912124c7f745913efe4e3aa771dc5c72c263fb4f413c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a7c983e9-81bb-4dd5-adf6-0b5430c4aed2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a7c983e9-81bb-4dd5-adf6-0b5430c4aed2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a7c983e9-81bb-4dd5-adf6-0b5430c4aed2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
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 0x1ed2e9741033a0d5eeaa912124c7f745913efe4e3aa771dc5c72c263fb4f413c. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7c983e9-81bb-4dd5-adf6-0b5430c4aed2.json and https://artists.proofprofile.net/proofs/artist/a7c983e9-81bb-4dd5-adf6-0b5430c4aed2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
album: Reba #2 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
  type: MusicAlbum
  date published: 2018-04-06
album: Reba #2 -Haneda International Music Festival Presents-
  type: MusicAlbum
  date published: 2018-04-06
album: Reba #3 -Haneda International Music Festival Presents-
  type: MusicAlbum
  date published: 2018-10-15
album: Reba #1 -Haneda International Music Festival Presents-
  type: MusicAlbum
  date published: 2018-10-26
album: Reba #1 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
  type: MusicAlbum
  date published: 2018-10-26
  track: アンインストール - アニメ「ぼくらの」より - 石川智晶
    type: MusicRecording
    duration: PT4M40S
    duration ms: 280653
    explicit: false
    by artist: Reba
    in album: Reba #1 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
      type: MusicAlbum
      date published: 2018-10-26
    genre: vocaloid
    isrc code: JPN821006950
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T00:45:53+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xdf3b20be720980f1665cfd98a34b571076c31795c5f50a1ae606315fa61583bf
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956856
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956856
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPN821006950
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:25:57Z
    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 0xdf3b20be720980f1665cfd98a34b571076c31795c5f50a1ae606315fa61583bf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPN821006950.
      date published: 2026-07-06T01:25:57Z
    audio: アンインストール - アニメ「ぼくらの」より - 石川智晶
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 122.494
      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: 0.536
      additional property: Energy
        type: PropertyValue
        value: 0.804
      additional property: Speechiness
        type: PropertyValue
        value: 0.032
      additional property: Acousticness
        type: PropertyValue
        value: 0.005
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.022
      additional property: Liveness
        type: PropertyValue
        value: 0.34
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.35
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.242
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Reba #4 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
  type: MusicAlbum
  date published: 2019-03-15
  track: 快晴 - Orangestar
    type: MusicRecording
    duration: PT4M25S
    duration ms: 265116
    explicit: false
    by artist: Reba
    in album: Reba #4 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
      type: MusicAlbum
      date published: 2019-03-15
    genre: vocaloid
    isrc code: JPN821009447
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T01:58:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd9b69d91c7bcd209c31ebbd3b343c3866ec4a43977096bbbda631555c641d9a2
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956889
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956889
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPN821009447
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T06:56:49Z
    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 0xd9b69d91c7bcd209c31ebbd3b343c3866ec4a43977096bbbda631555c641d9a2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPN821009447.
      date published: 2026-07-06T06:56:49Z
    audio: 快晴 - Orangestar
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 172.085
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.413
      additional property: Energy
        type: PropertyValue
        value: 0.957
      additional property: Speechiness
        type: PropertyValue
        value: 0.073
      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
album: Reba #5 -Haneda International Music Festival Presents-
album: Reba #6 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
album: Reba #5 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
album: Reba #7 -Haneda International Music Festival Presents-
album: Reba #7 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～

Acousticness
type: PropertyValue
value: 0.004

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.116

Valence (Positivity)
type: PropertyValue
value: 0.646

Loudness (dB)
type: PropertyValue
value: -2.669

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major

Reba #5 -Haneda International Music Festival Presents-
type: MusicAlbum
date published: 2020-02-07

Reba #6 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
type: MusicAlbum
date published: 2020-02-07

Reba #5 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
type: MusicAlbum
date published: 2020-02-07

Reba #7 -Haneda International Music Festival Presents-
type: MusicAlbum
date published: 2020-07-10

Reba #7 ～HANEDA INTERNATIONAL MUSIC FESTIVAL Presents～
type: MusicAlbum
date published: 2020-07-10