Mai Hoshimura
type: MusicGroup
genre: anime
description: is a Japanese pop singer-songwriter and pianist. On May 31, 2009, her contract with Sony ended. Biography Mai Hoshimura was born on April 18, 1981, in Matsue, Shimane. Hoshimura began to learn to
popularity: 26
followers: 6161
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additional property: CopyrightChainExplorerURL
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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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  date published: 2026-06-12T21:20:00Z
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album: Stay With You
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  date published: 2002
album: GET HAPPY
  type: MusicAlbum
  date published: 2003-05-14
album: GET HAPPY
  type: MusicAlbum
  date published: 2003-05-14
album: SOUP
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  date published: 2003-07-09
album: ビリーヴァー
  type: MusicAlbum
  date published: 2003-12-03
album: Cherish
  type: MusicAlbum
  date published: 2004-02-26
album: ひまわり
  type: MusicAlbum
  date published: 2004-06-09
album: SOUP
  type: MusicAlbum
  date published: 2004-08-19
  track: GET HAPPY
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    by artist: Mai Hoshimura
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      date published: 2004-08-19
    genre: anime
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    additional property: OTSVerifyInstructions
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-19T06:43:29Z
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album: Melodea
  type: MusicAlbum
  date published: 2005-03-16
album: Merry Go Round
  type: MusicAlbum
  date published: 2005-04-01
album: EVERY
  type: MusicAlbum
  date published: 2005-04-01
album: Merry Go Round
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  date published: 2005-04-01
album: 素直になれない
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  date published: 2005-04-01
album: RELAXIN' WITH JAPANESE LOVERS VOLUME 4
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  date published: 2005-08-03
album: Joyful
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  date published: 2006-01-25
album: Joyful
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  date published: 2006-01-25
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    by artist: Mai Hoshimura
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      type: MusicAlbum
      date published: 2006-01-25
    genre: anime
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    subject of: OpenTimestamps Proof of Existence
    audio: EVERY
  track: プラスティック・ラブ
  track: Merry Go Round
album: 桜日和
album: 瞬間、ストロボ。
album: かけがえのない人へ
album: regret
album: ひかり
album: MY LIFE
album: PIANO&BEST
album: おもひで。
album: MySelection2010-2013
album: GoodToday
album: ひかり / 桜日和 BESTタッグ

OTSVerificationAPI
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OTSTimestamp
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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 0x3af2d15df214a952b669b4a0eac3a89867d1bee1a60ddf30a39df87100b3bc74. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPN300500601.
date published: 2026-07-13T14:41:15Z

EVERY
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additional property: Time Signature
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additional property: Danceability
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プラスティック・ラブ
type: MusicRecording
duration: PT4M41S
duration ms: 281626
explicit: false
by artist: Mai Hoshimura
in album: Joyful
  type: MusicAlbum
  date published: 2006-01-25
genre: anime
isrc code: JPN300500883
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additional property: OTSTimestamp
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862614f9d414125a0eb3573d2a27bad21ea0b96e883d8af19020152422f7dd5a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPN300500883.
  date published: 2026-07-18T12:14:37Z
audio: プラスティック・ラブ
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Merry Go Round
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duration: PT4M36S
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by artist: Mai Hoshimura
in album: Joyful
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  date published: 2006-01-25
genre: anime
isrc code: JPN300501801
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additional property: OTSTimestamp
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7b987bfbe602fd76d3ba6d4b42f0096f8930a49fcb12fa0a6268b887970395. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:03:42Z), 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/JPN300501801.
  date published: 2026-07-15T11:03:42Z
audio: Merry Go Round
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桜日和
type: MusicAlbum
date published: 2007-02-28

桜日和
type: MusicAlbum
date published: 2007-03-07

瞬間、ストロボ。
type: MusicAlbum
date published: 2007-05-23

かけがえのない人へ
type: MusicAlbum
date published: 2007-10-19

regret
type: MusicAlbum
date published: 2008-06-04

regret
type: MusicAlbum
date published: 2008-06-04

ひかり
type: MusicAlbum
date published: 2008-08-17

ひかり
type: MusicAlbum
date published: 2008-08-20

MY LIFE
type: MusicAlbum
date published: 2008-09-17

MY LIFE
type: MusicAlbum
date published: 2008-09-17

PIANO&BEST
type: MusicAlbum
date published: 2009-03-11
track: 桜日和
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    date published: 2009-03-11
  genre: anime
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466a912752fd833225b19f5723cbe1f19f76101feaa8270c9a05555b15ef11d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPU900700081.
    date published: 2026-07-02T16:51:38Z
  audio: 桜日和
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PIANO&BEST
type: MusicAlbum
date published: 2009-03-11

おもひで。
type: MusicAlbum
date published: 2017-10-25

MySelection2010-2013
type: MusicAlbum
date published: 2020-12-16

GoodToday
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date published: 2020-12-16

ひかり / 桜日和 BESTタッグ
type: MusicAlbum
date published: 2022-03-23