Maaya Sakammoto
type: MusicGroup
popularity: 12
followers: 5
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0de83088167df78c6689b28f58bc7d5e700554b4beee9144497d83240b02b910
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953592
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953592
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/031bf48d-7897-41b4-a1dc-47bd19291557.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/031bf48d-7897-41b4-a1dc-47bd19291557.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/031bf48d-7897-41b4-a1dc-47bd19291557
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T05:36:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0de83088167df78c6689b28f58bc7d5e700554b4beee9144497d83240b02b910","name":"Maaya Sakammoto","registered_at":"2026-06-14T04:46:14Z","symbol":"NIM0342791","token_address":"0x7fe6ca8b289cfb9a1c5ef82dbffa7f8219b4cd1e","type":"artist","uuid":"031bf48d-7897-41b4-a1dc-47bd19291557"}
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 0x0de83088167df78c6689b28f58bc7d5e700554b4beee9144497d83240b02b910. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/031bf48d-7897-41b4-a1dc-47bd19291557.json and https://artists.proofprofile.net/proofs/artist/031bf48d-7897-41b4-a1dc-47bd19291557.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T05:36:59Z
  text: {"copyright_id":"0x0de83088167df78c6689b28f58bc7d5e700554b4beee9144497d83240b02b910","name":"Maaya Sakammoto","registered_at":"2026-06-14T04:46:14Z","symbol":"NIM0342791","token_address":"0x7fe6ca8b289cfb9a1c5ef82dbffa7f8219b4cd1e","type":"artist","uuid":"031bf48d-7897-41b4-a1dc-47bd19291557"}
track: MAP for LOVE
  type: MusicRecording
  duration: PT4M47S
  duration ms: 287866
  explicit: false
  by artist: Tomita Lab.
  by artist: KENTO NAGATSUKA (WONK)
  by artist: WONK
  by artist: Maaya Sakammoto
  by artist: 長岡亮介
  by artist: Petrolz
  by artist: Naz
  by artist: bird
  by artist: Sakura Fujiwara
  by artist: Yasuyuki Horigome
  by artist: Sara Yoshida
  by artist: MONONKVL
  by artist: Ryohu
  by artist: KANDYTOWN
  in album: MAP for LOVE
    type: MusicAlbum
    date published: 2021-04-21
  genre: japanese-r-b
  genre: japanese-jazztronica
  isrc code: JPVI02100700
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-08T11:23:46+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xacff8ab9f1e7a1fc8e9526a1fe94de9a0ca64a1c998ecdae51ac7fef25c6ade1
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 953520
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/953520
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI02100700
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-06-13T13:32:09Z
  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 0xacff8ab9f1e7a1fc8e9526a1fe94de9a0ca64a1c998ecdae51ac7fef25c6ade1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPVI02100700.
    date published: 2026-06-13T13:32:09Z
  audio: MAP for LOVE
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 178.207
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.388
    additional property: Energy
      type: PropertyValue
      value: 0.591
    additional property: Speechiness
      type: PropertyValue
      value: 0.033
    additional property: Acousticness
      type: PropertyValue
      value: 0.49
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.117
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.437
    additional property: Loudness (dB)
      type: PropertyValue
      value: -10.153
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major