Opt
type: MusicGroup
genre: celtic
description: REDIRECT OPT
popularity: 12
followers: 674
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9509243e3a70b78772a6a08ad561b5d6a41759987eb2102ac0c804b56bb3aaeb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953782
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953782
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d3f34da9-d86b-4d30-9406-243c282f09a3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d3f34da9-d86b-4d30-9406-243c282f09a3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d3f34da9-d86b-4d30-9406-243c282f09a3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T12:13:59Z
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 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 0x9509243e3a70b78772a6a08ad561b5d6a41759987eb2102ac0c804b56bb3aaeb. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3f34da9-d86b-4d30-9406-243c282f09a3.json and https://artists.proofprofile.net/proofs/artist/d3f34da9-d86b-4d30-9406-243c282f09a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T12:13:59Z
album: 夜、寝る前に聴く音楽集
  type: MusicAlbum
  date published: 2015-03-15
album: before sleeping
  type: MusicAlbum
  date published: 2015-03-15
album: 日本の夏、寝る前に聴く納涼音楽集
  type: MusicAlbum
  date published: 2015-08-25
album: Enjoy Cool Evening
  type: MusicAlbum
  date published: 2015-08-25
album: 雨の音
  type: MusicAlbum
  date published: 2015-10-23
album: rain sound
  type: MusicAlbum
  date published: 2015-10-23
album: フィドルは踊る、ケルト風音楽集
  type: MusicAlbum
  date published: 2017-02-24
album: dancing fiddle -celtic music-
  type: MusicAlbum
  date published: 2017-02-24
album: 雨の音、詰め合わせ
  type: MusicAlbum
  date published: 2017-06-11
  track: 花時雨
    type: MusicRecording
    duration: PT9M18S
    duration ms: 558855
    explicit: false
    by artist: Opt
    in album: 雨の音、詰め合わせ
      type: MusicAlbum
      date published: 2017-06-11
    genre: celtic
    isrc code: TCJPF1776044
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-02T22:00:15+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x20fb49bac0cd5c348125422c22e50701d717f52c83986adbb40c20b4de41d47a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956420
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956420
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1776044
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T00:42:11Z
    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 0x20fb49bac0cd5c348125422c22e50701d717f52c83986adbb40c20b4de41d47a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPF1776044.
      date published: 2026-07-03T00:42:11Z
    audio: 花時雨
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 71.321
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.074
      additional property: Energy
        type: PropertyValue
        value: 1
      additional property: Speechiness
        type: PropertyValue
        value: 0.051
      additional property: Acousticness
        type: PropertyValue
        value: 0.267
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.97
      additional property: Liveness
        type: PropertyValue
        value: 0.861
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0
      additional property: Loudness (dB)
        type: PropertyValue
        value: -15.971
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: 地雨
    type: MusicRecording
    duration: PT8M34S
    duration ms: 514352
    explicit: false
    by artist: Opt
    in album: 雨の音、詰め合わせ
      type: MusicAlbum
      date published: 2017-06-11
    genre: celtic
    isrc code: TCJPF1776048
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T02:19:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x49a339da0401526fe487849e80252c0dfd97178edcab66bbfee58c01923140a1
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956634
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956634
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1776048
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T10:04:33Z
    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 0x49a339da0401526fe487849e80252c0dfd97178edcab66bbfee58c01923140a1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPF1776048.
      date published: 2026-07-04T10:04:33Z
    audio: 地雨
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 82.153
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      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
  track: 桜雨
  track: 雷雨
album: Rain Sounds
album: Omoide To Sayo
album: 思い出と小夜
album: The Sound Of Waves
album: 傘の音、詰め合わせ
album: Assorted Umbrella Sounds
album: Wave Sounds
album: 波の音、詰め合わせ
album: Forest Album
album: 森を旅する音楽集
album: 夜に生まれたピアノ曲集
album: Night Piano
album: Bard's Destination
album: 水景とピアノ
album: Waterscape and Piano
album: 翠の軒先
album: Emerald eaves
album: Seaside Road in Spring
album: 海道の春

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.129

Energy
type: PropertyValue
value: 0.997

Speechiness
type: PropertyValue
value: 0.046

Acousticness
type: PropertyValue
value: 0.132

Instrumentalness
type: PropertyValue
value: 0.991

Liveness
type: PropertyValue
value: 0.35

Valence (Positivity)
type: PropertyValue
value: 0

Loudness (dB)
type: PropertyValue
value: -19.696

Key Name
type: PropertyValue
value: Bb

Mode Name
type: PropertyValue
value: Minor

桜雨
type: MusicRecording
duration: PT9M1S
duration ms: 541652
explicit: false
by artist: Opt
in album: 雨の音、詰め合わせ
  type: MusicAlbum
  date published: 2017-06-11
genre: celtic
isrc code: TCJPF1776049
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-03T01:44:44+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2bd2f694701245292d250c81b8f72e6ee1fa93d2c22a49e8f617b2cc087f97da
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956474
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956474
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1776049
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-03T08:56:35Z
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 0x2bd2f694701245292d250c81b8f72e6ee1fa93d2c22a49e8f617b2cc087f97da. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPF1776049.
  date published: 2026-07-03T08:56:35Z
audio: 桜雨
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 81.655
  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 1
  additional property: Danceability
    type: PropertyValue
    value: 0.077
  additional property: Energy
    type: PropertyValue
    value: 1
  additional property: Speechiness
    type: PropertyValue
    value: 0.051
  additional property: Acousticness
    type: PropertyValue
    value: 0.148
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.978
  additional property: Liveness
    type: PropertyValue
    value: 0.543
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0
  additional property: Loudness (dB)
    type: PropertyValue
    value: -16.26
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Major

雷雨
type: MusicRecording
duration: PT9M2S
duration ms: 542975
explicit: false
by artist: Opt
in album: 雨の音、詰め合わせ
  type: MusicAlbum
  date published: 2017-06-11
genre: celtic
isrc code: TCJPF1776054
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-05T02:13:27+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0cf41174f9853e8164963e1d2fe6aa9e020e3c2f1c89d11076fba7b040037831
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956772
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956772
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1776054
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-05T10:01:46Z
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 0x0cf41174f9853e8164963e1d2fe6aa9e020e3c2f1c89d11076fba7b040037831. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPF1776054.
  date published: 2026-07-05T10:01:46Z
audio: 雷雨
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 81.262
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.119
  additional property: Energy
    type: PropertyValue
    value: 1
  additional property: Speechiness
    type: PropertyValue
    value: 0.067
  additional property: Acousticness
    type: PropertyValue
    value: 0.428
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.887
  additional property: Liveness
    type: PropertyValue
    value: 0.727
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.928
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Rain Sounds
type: MusicAlbum
date published: 2017-06-11

Omoide To Sayo
type: MusicAlbum
date published: 2018-11-04

思い出と小夜
type: MusicAlbum
date published: 2018-11-04

The Sound Of Waves
type: MusicAlbum
date published: 2019-01-15

傘の音、詰め合わせ
type: MusicAlbum
date published: 2019-08-16

Assorted Umbrella Sounds
type: MusicAlbum
date published: 2019-08-16

Wave Sounds
type: MusicAlbum
date published: 2020-04-01

波の音、詰め合わせ
type: MusicAlbum
date published: 2020-04-01

Forest Album
type: MusicAlbum
date published: 2020-12-12

森を旅する音楽集
type: MusicAlbum
date published: 2020-12-12

夜に生まれたピアノ曲集
type: MusicAlbum
date published: 2021-04-10

Night Piano
type: MusicAlbum
date published: 2021-04-10

Bard's Destination
type: MusicAlbum
date published: 2022-09-08

Bard's Destination
type: MusicAlbum
date published: 2022-09-08

水景とピアノ
type: MusicAlbum
date published: 2023-07-26

Waterscape and Piano
type: MusicAlbum
date published: 2023-07-26

翠の軒先
type: MusicAlbum
date published: 2024-09-12

Emerald eaves
type: MusicAlbum
date published: 2024-09-12

Seaside Road in Spring
type: MusicAlbum
date published: 2025-03-27

海道の春
type: MusicAlbum
date published: 2025-03-27