Sister
type: MusicGroup
genre: indie rock
description: thumb|right|Two child sisters, the elder tending to the younger . thumb|The Game of Chess (1555) by Sofonisba Anguissola (It depicts her sisters Lucia (left), Minerva (right) and Europa (middle) Angui
popularity: 6
followers: 894
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x24bce206233fd3f0c0cf3c76da11f24624b6cb7eb4a0e4924c6cb7b4980edb56
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953879
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953879
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0937c8d7-4ef6-4e39-a981-3d2545e14c05.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0937c8d7-4ef6-4e39-a981-3d2545e14c05.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0937c8d7-4ef6-4e39-a981-3d2545e14c05
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T02:57:35Z
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 0x24bce206233fd3f0c0cf3c76da11f24624b6cb7eb4a0e4924c6cb7b4980edb56. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0937c8d7-4ef6-4e39-a981-3d2545e14c05.json and https://artists.proofprofile.net/proofs/artist/0937c8d7-4ef6-4e39-a981-3d2545e14c05.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:57:35Z
album: Talk of the Town
  type: MusicAlbum
  date published: 2021-09-10
album: Bam Bam
  type: MusicAlbum
  date published: 2022-02-03
album: Can't Be Love
  type: MusicAlbum
  date published: 2023-06-09
album: Never Gunna Get It Back
  type: MusicAlbum
  date published: 2023-11-24
album: Feel It
  type: MusicAlbum
  date published: 2024-02-23
  track: Feel It
    type: MusicRecording
    duration: PT2M45S
    duration ms: 165098
    explicit: false
    by artist: Sister
    in album: Feel It
      type: MusicAlbum
      date published: 2024-02-23
    genre: indie rock
    isrc code: QZDA42448097
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T14:49:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd0ada8a84e53366d7eaa83ab2e184b904ca0097c76405c6fca2ed5ad02c03533
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958746
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958746
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42448097
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T17:51:21Z
    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 0xd0ada8a84e53366d7eaa83ab2e184b904ca0097c76405c6fca2ed5ad02c03533. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:51:21Z), 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/QZDA42448097.
      date published: 2026-07-19T17:51:21Z
    audio: Feel It
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 76.461
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.563
      additional property: Energy
        type: PropertyValue
        value: 0.83
      additional property: Speechiness
        type: PropertyValue
        value: 0.05
      additional property: Acousticness
        type: PropertyValue
        value: 0.006
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.382
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.78
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.246
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Lip Service
  type: MusicAlbum
  date published: 2024-05-08
album: I'm Not In Love
  type: MusicAlbum
  date published: 2024-08-16
  track: I'm Not In Love
    type: MusicRecording
    duration: PT2M55S
    duration ms: 175090
    explicit: false
    by artist: Sister
    in album: I'm Not In Love
      type: MusicAlbum
      date published: 2024-08-16
    genre: indie rock
    isrc code: QZTAX2404106
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T12:57:44+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x291be47525182665819a3e18f55b404266083faf0396957bf7306edbde86c3b3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958736
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958736
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2404106
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T16:00:44Z
    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 0x291be47525182665819a3e18f55b404266083faf0396957bf7306edbde86c3b3. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:00:44Z), 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/QZTAX2404106.
      date published: 2026-07-19T16:00:44Z
    audio: I'm Not In Love
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 87.032
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.482
      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
album: Hot

Energy
type: PropertyValue
value: 0.764

Speechiness
type: PropertyValue
value: 0.044

Acousticness
type: PropertyValue
value: 0.004

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.171

Valence (Positivity)
type: PropertyValue
value: 0.252

Loudness (dB)
type: PropertyValue
value: -7.223

Key Name
type: PropertyValue
value: Eb

Mode Name
type: PropertyValue
value: Minor

Hot
type: MusicAlbum
date published: 2025-06-27