Sepa
type: MusicGroup
description: REDIRECT SEPA
popularity: 9
followers: 110
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe6a4a3a46187e3a941f4dbb78fd60d34cb6b8f7d50162cc4eeb03afdc136020f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953923
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953923
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ca2b7dc-dab9-475c-a294-dd75d887cc73.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ca2b7dc-dab9-475c-a294-dd75d887cc73.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1ca2b7dc-dab9-475c-a294-dd75d887cc73
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T09:51:37Z
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 0xe6a4a3a46187e3a941f4dbb78fd60d34cb6b8f7d50162cc4eeb03afdc136020f. Chain 2 (Bitcoin): anchored in block 953924 (2026-06-16T09:52:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ca2b7dc-dab9-475c-a294-dd75d887cc73.json and https://artists.proofprofile.net/proofs/artist/1ca2b7dc-dab9-475c-a294-dd75d887cc73.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T09:52:28Z
album: 知育ソング 聞くだけで覚えちゃう
  type: MusicAlbum
  date published: 2020-05-27
album: Kids Songs & Nursery Rhymes
  type: MusicAlbum
  date published: 2020-05-27
album: Kids Songs & Nursery Rhymes. / Just listening makes remember !
  type: MusicAlbum
  date published: 2023-05-27
  track: Good night ABC song & Twinkle Twinkle Little Star
    type: MusicRecording
    duration: PT2M31S
    duration ms: 151000
    explicit: false
    by artist: Sepa
    in album: Kids Songs & Nursery Rhymes. / Just listening makes remember !
      type: MusicAlbum
      date published: 2023-05-27
    isrc code: TCJPV2366961
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T13:43:51+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x33a2e91462cc6577c773e20dc113ba2b91e2c4a7bbb932e9e9fd5de773a807da
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956826
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956826
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPV2366961
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T19:27:56Z
    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 0x33a2e91462cc6577c773e20dc113ba2b91e2c4a7bbb932e9e9fd5de773a807da. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPV2366961.
      date published: 2026-07-05T19:27:56Z
    audio: Good night ABC song & Twinkle Twinkle Little Star
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.486
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.401
      additional property: Energy
        type: PropertyValue
        value: 0.095
      additional property: Speechiness
        type: PropertyValue
        value: 0.036
      additional property: Acousticness
        type: PropertyValue
        value: 0.96
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.001
      additional property: Liveness
        type: PropertyValue
        value: 0.103
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.1
      additional property: Loudness (dB)
        type: PropertyValue
        value: -13.019
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: 知育ソング 聞くだけで覚えちゃう！子供の歌
  type: MusicAlbum
  date published: 2023-05-27
  track: 英語の歌 数字 1〜20 -すうじのうた- - English Ver.
    type: MusicRecording
    duration: PT2M8S
    duration ms: 128394
    explicit: false
    by artist: Sepa
    in album: 知育ソング 聞くだけで覚えちゃう！子供の歌
      type: MusicAlbum
      date published: 2023-05-27
    isrc code: TCJPV2366954
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T09:04:59+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0694933ed23a1b62e9d40ef9100740a8789bb368883b861cfedff2647372b97c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956790
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956790
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPV2366954
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T12:31:54Z
    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 0x0694933ed23a1b62e9d40ef9100740a8789bb368883b861cfedff2647372b97c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPV2366954.
      date published: 2026-07-05T12:31:54Z
    audio: 英語の歌 数字 1〜20 -すうじのうた- - English Ver.
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 149.38
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.415
      additional property: Energy
        type: PropertyValue
        value: 0.705
      additional property: Speechiness
        type: PropertyValue
        value: 0.045
      additional property: Acousticness
        type: PropertyValue
        value: 0.481
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: 知育クリスマスソング
album: Learn christmas songs for Kids
album: Hinamatsurinrin ~Doll's Festival Song~
album: Our running Shinkansen
album: 走れ僕らの新幹線

Liveness
type: PropertyValue
value: 0.307

Valence (Positivity)
type: PropertyValue
value: 0.697

Loudness (dB)
type: PropertyValue
value: -5.676

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Major

知育クリスマスソング
type: MusicAlbum
date published: 2024-10-10

Learn christmas songs for Kids
type: MusicAlbum
date published: 2024-10-10

Hinamatsurinrin ~Doll's Festival Song~
type: MusicAlbum
date published: 2025-03-25

Our running Shinkansen
type: MusicAlbum
date published: 2025-09-01

走れ僕らの新幹線
type: MusicAlbum
date published: 2025-09-01