Krystal Xu
type: MusicGroup
genre: anime
popularity: 12
followers: 257
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xc5371267dfbd2dbecddd158625858e74510a6bdf5e5bd781fbea1b221382c98e
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 953605
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953605
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1035ac10-b4cf-4fa5-9264-6e270db78472.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1035ac10-b4cf-4fa5-9264-6e270db78472.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1035ac10-b4cf-4fa5-9264-6e270db78472
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T07:39:50Z
additional property: OTSCanonicalRecord
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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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5371267dfbd2dbecddd158625858e74510a6bdf5e5bd781fbea1b221382c98e. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1035ac10-b4cf-4fa5-9264-6e270db78472.json and https://artists.proofprofile.net/proofs/artist/1035ac10-b4cf-4fa5-9264-6e270db78472.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T07:39:50Z
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album: Fake Wings
  type: MusicAlbum
  date published: 2017-12-14
album: Fake Wings (From ".hack//SIGN")
  type: MusicAlbum
  date published: 2017-12-14
album: Sincerely (Violet Evergarden)
  type: MusicAlbum
  date published: 2018-05-07
album: Sincerely (From "Violet Evergarden")
  type: MusicAlbum
  date published: 2018-05-07
album: Resuscitated Hope (From "Gosick")
  type: MusicAlbum
  date published: 2018-08-14
album: Resuscitated Hope
  type: MusicAlbum
  date published: 2018-08-14
album: Resuscitated Hope (From "Gosick")
  type: MusicAlbum
  date published: 2018-08-14
  track: Resuscitated Hope (From "Gosick")
    type: MusicRecording
    duration: PT4M52S
    duration ms: 292194
    explicit: false
    by artist: Krystal Xu
    in album: Resuscitated Hope (From "Gosick")
      type: MusicAlbum
      date published: 2018-08-14
    genre: anime
    isrc code: QZDA81810873
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T16:52:45+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x286e879870a5131fdd2d966e87cbd00acbc2f7d521ca9bec2d2601699ccc3dca
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958444
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958444
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA81810873
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T19:12:23Z
    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 0x286e879870a5131fdd2d966e87cbd00acbc2f7d521ca9bec2d2601699ccc3dca. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA81810873.
      date published: 2026-07-17T19:12:23Z
    audio: Resuscitated Hope (From "Gosick")
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 129.944
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.506
      additional property: Energy
        type: PropertyValue
        value: 0.629
      additional property: Speechiness
        type: PropertyValue
        value: 0.032
      additional property: Acousticness
        type: PropertyValue
        value: 0.432
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.091
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.369
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.792
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Credens Justitiam (From "Puella Magi Madoka Magica")
  type: MusicAlbum
  date published: 2019-07-01
album: Credens Justitiam (From "Puella Magi Madoka Magica")
  type: MusicAlbum
  date published: 2019-07-01
  track: Credens Justitiam (From "Puella Magi Madoka Magica")
    type: MusicRecording
    duration: PT3M58S
    duration ms: 238936
    explicit: false
    by artist: Krystal Xu
    in album: Credens Justitiam (From "Puella Magi Madoka Magica")
      type: MusicAlbum
      date published: 2019-07-01
    genre: anime
    isrc code: QZGWW1929713
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T20:01:00+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x129fc9c0a391f32ff02d09485a0611e6339bfbfcdc4b881fc47c59af66ab54f9
    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/QZGWW1929713
    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 0x129fc9c0a391f32ff02d09485a0611e6339bfbfcdc4b881fc47c59af66ab54f9. 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/QZGWW1929713.
      date published: 2026-07-06T01:25:57Z
    audio: Credens Justitiam (From "Puella Magi Madoka Magica")
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 135.549
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      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: Sayonara (From "Adieu Galaxy Express 999")
album: Isabella's Lullaby (From "The Promised Neverland")
album: Believe (From "Fate/Stay Night")
album: Anime Dream
album: Break (From "Yashahime: Princess Half-Demon")
album: Homura (From "Demon Slayer: Kimetsu no Yaiba")
album: Anima (From "Sword Art Online: Alicization")
album: Dawn (From "Back Arrow")
album: The Edge of Dawn (from "Fire Emblem: Three Houses")
album: The Sea and a Pearl (From "Fena: Pirate Princess")
album: Red Swan (From "Attack on Titan") [English Version]
album: Saikai
album: Akeboshi (From "Demon Slayer: Kimetsu no Yaiba") [English Cover]
album: Jasmine (from "Tsubasa: Reservoir Chronicle") [English Cover]
album: Sis Puella Magica (From "Puella Magi Madoka Magica") [Kyubey's Version]
album: The Promise of the World (From "Howl's Moving Castle") [English Version]
album: Lend Me Your Voice (From "Belle") [English Cover]
album: Inside a Dream (From "Deemo: Memorial Keys") [Cover]
album: Tears of Suzume (From "Suzume") [Cover]
album: Where The Wind Blows (From "One Piece Film: Red") [English Cover]
album: Moon Halo (from "Honkai Impact 3rd") [Cover]
album: La Vaguelette (from "Genshin Impact") [Cover]

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.294

Energy
type: PropertyValue
value: 0.648

Speechiness
type: PropertyValue
value: 0.036

Acousticness
type: PropertyValue
value: 0.566

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.098

Valence (Positivity)
type: PropertyValue
value: 0.216

Loudness (dB)
type: PropertyValue
value: -8.178

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

Sayonara (From "Adieu Galaxy Express 999")
type: MusicAlbum
date published: 2019-08-19

Sayonara (From "Adieu Galaxy Express 999")
type: MusicAlbum
date published: 2019-08-19

Isabella's Lullaby (From "The Promised Neverland")
type: MusicAlbum
date published: 2019-09-12

Isabella's Lullaby (From "The Promised Neverland")
type: MusicAlbum
date published: 2019-09-12

Believe (From "Fate/Stay Night")
type: MusicAlbum
date published: 2020-12-28

Anime Dream
type: MusicAlbum
date published: 2021-01-08
track: Stories (From "Code Geass")
  type: MusicRecording
  duration: PT5M16S
  duration ms: 316818
  explicit: false
  by artist: Krystal Xu
  in album: Anime Dream
    type: MusicAlbum
    date published: 2021-01-08
  genre: anime
  isrc code: QZGWX2061179
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T23:27:59+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf81c5f4446f8606afa634d52042513b4443960a93b8a5f934b60deb32dfa487d
  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/QZGWX2061179
  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 0xf81c5f4446f8606afa634d52042513b4443960a93b8a5f934b60deb32dfa487d. 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/QZGWX2061179.
    date published: 2026-07-06T01:25:57Z
  audio: Stories (From "Code Geass")
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 65.988
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.465
    additional property: Energy
      type: PropertyValue
      value: 0.423
    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.122
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.096
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.143
    additional property: Loudness (dB)
      type: PropertyValue
      value: -10.073
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Break (From "Yashahime: Princess Half-Demon")
type: MusicAlbum
date published: 2021-02-05

Homura (From "Demon Slayer: Kimetsu no Yaiba")
type: MusicAlbum
date published: 2021-02-12

Anima (From "Sword Art Online: Alicization")
type: MusicAlbum
date published: 2021-02-18

Dawn (From "Back Arrow")
type: MusicAlbum
date published: 2021-03-12

The Edge of Dawn (from "Fire Emblem: Three Houses")
type: MusicAlbum
date published: 2021-11-11

The Sea and a Pearl (From "Fena: Pirate Princess")
type: MusicAlbum
date published: 2021-11-24

Red Swan (From "Attack on Titan") [English Version]
type: MusicAlbum
date published: 2021-12-14

Saikai
type: MusicAlbum
date published: 2022-02-28

Akeboshi (From "Demon Slayer: Kimetsu no Yaiba") [English Cover]
type: MusicAlbum
date published: 2022-08-24

Jasmine (from "Tsubasa: Reservoir Chronicle") [English Cover]
type: MusicAlbum
date published: 2022-09-23

Sis Puella Magica (From "Puella Magi Madoka Magica") [Kyubey's Version]
type: MusicAlbum
date published: 2022-10-17

The Promise of the World (From "Howl's Moving Castle") [English Version]
type: MusicAlbum
date published: 2022-12-05

Lend Me Your Voice (From "Belle") [English Cover]
type: MusicAlbum
date published: 2022-12-16

Inside a Dream (From "Deemo: Memorial Keys") [Cover]
type: MusicAlbum
date published: 2023-02-09

Tears of Suzume (From "Suzume") [Cover]
type: MusicAlbum
date published: 2023-07-24

Where The Wind Blows (From "One Piece Film: Red") [English Cover]
type: MusicAlbum
date published: 2023-08-15

Moon Halo (from "Honkai Impact 3rd") [Cover]
type: MusicAlbum
date published: 2023-12-28

La Vaguelette (from "Genshin Impact") [Cover]
type: MusicAlbum
date published: 2024-11-15