MARY CHEN
type: MusicGroup
genre: opm
description: Chen Man-li (; born 5 February 1955), also known by her English name Mary Chen, is a Taiwanese environmentalist and politician. A longtime leader of the Homemakers' Union and Foundation and the Nation
popularity: 10
followers: 91
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548ea93a3dd23313166e250b1799bc897f45500aca061d0eef369a8977f786a7. Chain 2 (Bitcoin): anchored in block 954023 (2026-06-16T23:57:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37cbb729-2da4-4042-bd99-3448d58eafa8.json and https://artists.proofprofile.net/proofs/artist/37cbb729-2da4-4042-bd99-3448d58eafa8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T23:57:23Z
  text: {"copyright_id":"0x548ea93a3dd23313166e250b1799bc897f45500aca061d0eef369a8977f786a7","name":"MARY CHEN","registered_at":"2026-06-16T09:03:54Z","symbol":"NIM1003272","token_address":"0xb982236daa1ce820abcc4118ef7a69f4cd1c4bef","type":"artist","uuid":"37cbb729-2da4-4042-bd99-3448d58eafa8"}
album: Sana'y Alam Mo
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  date published: 2021-04-16
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    explicit: false
    by artist: MARY CHEN
    in album: Sana'y Alam Mo
      type: MusicAlbum
      date published: 2021-04-16
    genre: opm
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
      type: PropertyValue
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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 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 0x1c381498d779249deddeb4985b9f5b569c5a87ee35418392d1709bfc4cdef320. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PHUM72100112 — a six-check JSON result.
      date published: 2026-07-18T19:24:05Z
    audio: Sana'y Alam Mo
      type: AudioObject
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      additional property: Time Signature
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      additional property: Danceability
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.178
      additional property: Key Name
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        value: C
      additional property: Mode Name
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album: Paulit-ulit
  type: MusicAlbum
  date published: 2022-03-09
album: Madaling Magmadali
  type: MusicAlbum
  date published: 2025-05-30
  track: Madaling Magmadali
    type: MusicRecording
    duration: PT3M8S
    duration ms: 188943
    explicit: false
    by artist: MARY CHEN
    in album: Madaling Magmadali
      type: MusicAlbum
      date published: 2025-05-30
    genre: opm
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    additional property: OTSTimestamp
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      value: 2026-07-17T07:07:02Z
    additional property: OTSVerifyInstructions
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      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 0xa8369f13264d568069fc2c486c7e083de375abbeaa552a747303ea440242522b. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PHV032513135 — a six-check JSON result.
      date published: 2026-07-17T07:07:02Z
    audio: Madaling Magmadali
      type: AudioObject
      additional property: Tempo (BPM)
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        value: 72.544
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
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        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.688
      additional property: Energy
        type: PropertyValue
        value: 0.554
      additional property: Speechiness
        type: PropertyValue
        value: 0.061
      additional property: Acousticness
        type: PropertyValue
        value: 0.847
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.007
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Walang Perpekto

Liveness
type: PropertyValue
value: 0.573

Valence (Positivity)
type: PropertyValue
value: 0.592

Loudness (dB)
type: PropertyValue
value: -6.595

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Major

Walang Perpekto
type: MusicAlbum
date published: 2025-08-15