Sleeping Key
type: MusicGroup
genre: neoclassical
popularity: 18
followers: 1615
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4ee2fc9c9a8fa5549d90c3d4a54387342ea27def6ef1854804593ba1b51fda40
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953803
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953803
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e5475d25-baf6-4270-9355-fcde551daab5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e5475d25-baf6-4270-9355-fcde551daab5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e5475d25-baf6-4270-9355-fcde551daab5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T15:41:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4ee2fc9c9a8fa5549d90c3d4a54387342ea27def6ef1854804593ba1b51fda40","name":"Sleeping Key","registered_at":"2026-06-15T04:31:36Z","symbol":"NIM0682851","token_address":"0x10536173226d8d470c21bb892619b733c689d2f2","type":"artist","uuid":"e5475d25-baf6-4270-9355-fcde551daab5"}
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 0x4ee2fc9c9a8fa5549d90c3d4a54387342ea27def6ef1854804593ba1b51fda40. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5475d25-baf6-4270-9355-fcde551daab5.json and https://artists.proofprofile.net/proofs/artist/e5475d25-baf6-4270-9355-fcde551daab5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T16:39:18Z
  text: {"copyright_id":"0x4ee2fc9c9a8fa5549d90c3d4a54387342ea27def6ef1854804593ba1b51fda40","name":"Sleeping Key","registered_at":"2026-06-15T04:31:36Z","symbol":"NIM0682851","token_address":"0x10536173226d8d470c21bb892619b733c689d2f2","type":"artist","uuid":"e5475d25-baf6-4270-9355-fcde551daab5"}
album: Dew
  type: MusicAlbum
  date published: 2022-02-11
album: Dawn
  type: MusicAlbum
  date published: 2022-04-15
album: Contemplation
  type: MusicAlbum
  date published: 2022-06-24
album: Evening Song
  type: MusicAlbum
  date published: 2022-09-23
album: Yonder
  type: MusicAlbum
  date published: 2023-02-10
album: Slow Down
  type: MusicAlbum
  date published: 2023-05-19
album: Serene
  type: MusicAlbum
  date published: 2023-06-16
album: Autumn
  type: MusicAlbum
  date published: 2023-10-20
  track: Autumn
    type: MusicRecording
    duration: PT2M42S
    duration ms: 162500
    explicit: false
    by artist: Sleeping Key
    in album: Autumn
      type: MusicAlbum
      date published: 2023-10-20
    genre: neoclassical
    isrc code: GX5MX2309221
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T13:16:14+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xba84ee5cbd75f2242884e130ce138fdad226191139d1efaf1386a3d08e49eaa7
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958420
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958420
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX5MX2309221
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T13:33:01Z
    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 0xba84ee5cbd75f2242884e130ce138fdad226191139d1efaf1386a3d08e49eaa7. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GX5MX2309221.
      date published: 2026-07-17T13:33:01Z
    audio: Autumn
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 62.615
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.476
      additional property: Energy
        type: PropertyValue
        value: 0.004
      additional property: Speechiness
        type: PropertyValue
        value: 0.052
      additional property: Acousticness
        type: PropertyValue
        value: 0.987
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.94
      additional property: Liveness
        type: PropertyValue
        value: 0.108
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.295
      additional property: Loudness (dB)
        type: PropertyValue
        value: -27.741
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: In Winter
  type: MusicAlbum
  date published: 2023-12-08
album: Breath of Spring
  type: MusicAlbum
  date published: 2024-03-01
album: Summer Night
  type: MusicAlbum
  date published: 2024-06-07
  track: Summer Night
    type: MusicRecording
    duration: PT2M25S
    duration ms: 145000
    explicit: false
    by artist: Sleeping Key
    in album: Summer Night
      type: MusicAlbum
      date published: 2024-06-07
    genre: neoclassical
    isrc code: GX38U2484107
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T17:52:54+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xec46dc880354a7bb52a3336a298c3a7ef80c2784b04e2c7c619dbeee35c384f8
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956728
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956728
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX38U2484107
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:43:49Z
    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 0xec46dc880354a7bb52a3336a298c3a7ef80c2784b04e2c7c619dbeee35c384f8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX38U2484107.
      date published: 2026-07-05T01:43:49Z
    audio: Summer Night
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 77.72
      additional property: Musical Key
      additional property: Mode (Major/Minor)
      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
album: Autumn Night
album: Winter Impressions
album: Spring Letter
album: Fragile
album: Dusk
album: On the Quiet
album: Tranquil

Musical Key
type: PropertyValue
value: 0

Mode (Major/Minor)
type: PropertyValue
value: 1

Time Signature
type: PropertyValue
value: 3

Danceability
type: PropertyValue
value: 0.318

Energy
type: PropertyValue
value: 0.004

Speechiness
type: PropertyValue
value: 0.058

Acousticness
type: PropertyValue
value: 0.992

Instrumentalness
type: PropertyValue
value: 0.91

Liveness
type: PropertyValue
value: 0.089

Valence (Positivity)
type: PropertyValue
value: 0.201

Loudness (dB)
type: PropertyValue
value: -27.967

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Major

Autumn Night
type: MusicAlbum
date published: 2024-10-18

Winter Impressions
type: MusicAlbum
date published: 2025-01-03

Spring Letter
type: MusicAlbum
date published: 2025-01-24
track: Spring Letter
  type: MusicRecording
  duration: PT1M58S
  duration ms: 118790
  explicit: false
  by artist: Sleeping Key
  in album: Spring Letter
    type: MusicAlbum
    date published: 2025-01-24
  genre: neoclassical
  isrc code: GXF972486687
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T03:14:30+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x14aa0c29ba9e72423e182db51ab595e5cda005d56cbb11450f93cf1b0df82e30
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958357
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958357
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF972486687
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-17T03:33:42Z
  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 0x14aa0c29ba9e72423e182db51ab595e5cda005d56cbb11450f93cf1b0df82e30. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GXF972486687.
    date published: 2026-07-17T03:33:42Z
  audio: Spring Letter
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 65.291
    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: 0.261
    additional property: Energy
      type: PropertyValue
      value: 0.025
    additional property: Speechiness
      type: PropertyValue
      value: 0.088
    additional property: Acousticness
      type: PropertyValue
      value: 0.971
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.897
    additional property: Liveness
      type: PropertyValue
      value: 0.103
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.147
    additional property: Loudness (dB)
      type: PropertyValue
      value: -31.641
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

Fragile
type: MusicAlbum
date published: 2025-04-25
track: Fragile
  type: MusicRecording
  duration: PT2M17S
  duration ms: 137260
  explicit: false
  by artist: Sleeping Key
  in album: Fragile
    type: MusicAlbum
    date published: 2025-04-25
  genre: neoclassical
  isrc code: GX38U2591409
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-12T23:06:13+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x0daa6f6f8dab69d224bd04941c69b14378034f521e60f07131ec3e89fa4b070b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957770
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957770
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX38U2591409
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-12T23:17:00Z
  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 0x0daa6f6f8dab69d224bd04941c69b14378034f521e60f07131ec3e89fa4b070b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX38U2591409.
    date published: 2026-07-12T23:17:00Z
  audio: Fragile
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 69.639
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.289
    additional property: Energy
      type: PropertyValue
      value: 0.023
    additional property: Speechiness
      type: PropertyValue
      value: 0.059
    additional property: Acousticness
      type: PropertyValue
      value: 0.978
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.941
    additional property: Liveness
      type: PropertyValue
      value: 0.099
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.176
    additional property: Loudness (dB)
      type: PropertyValue
      value: -22.722
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major

Dusk
type: MusicAlbum
date published: 2025-06-06

On the Quiet
type: MusicAlbum
date published: 2025-08-22

Tranquil
type: MusicAlbum
date published: 2025-10-10