Del
type: MusicGroup
description: right|100px|thumb|Del operator,represented bythe nabla symbol Del, or nabla, is an operator used in mathematics (particularly in vector calculus) as a vector differential operator, usually represented
popularity: 20
followers: 3866
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6cee0eef8511a2a366f87ed4271a296eec030a11e45c89ec035dd409f2428396
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953687
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953687
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/69636c9e-d208-4030-8db4-3e9f1516ba1f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/69636c9e-d208-4030-8db4-3e9f1516ba1f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/69636c9e-d208-4030-8db4-3e9f1516ba1f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T20:19:15Z
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 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 0x6cee0eef8511a2a366f87ed4271a296eec030a11e45c89ec035dd409f2428396. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69636c9e-d208-4030-8db4-3e9f1516ba1f.json and https://artists.proofprofile.net/proofs/artist/69636c9e-d208-4030-8db4-3e9f1516ba1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T20:19:15Z
album: L.A
  type: MusicAlbum
  date published: 2018-09-13
album: Random Chords
  type: MusicAlbum
  date published: 2018-09-13
album: You Never Know
  type: MusicAlbum
  date published: 2018-09-13
album: Inspiration
  type: MusicAlbum
  date published: 2018-09-13
album: Fantasy
  type: MusicAlbum
  date published: 2018-09-13
album: Cold Sun
  type: MusicAlbum
  date published: 2018-09-13
album: Smells Like Summer
  type: MusicAlbum
  date published: 2018-09-13
album: Tropical Love
  type: MusicAlbum
  date published: 2018-09-13
album: Summer Moments
  type: MusicAlbum
  date published: 2018-09-13
  track: Summer Moments
    type: MusicRecording
    duration: PT3M5S
    duration ms: 185894
    explicit: false
    by artist: Del
    in album: Summer Moments
      type: MusicAlbum
      date published: 2018-09-13
    isrc code: QM2PV1834154
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T02:10:16+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8c6948a798c169b405856d73b7e5c19048d4a199c6ca35674617a236aa59ab4f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958808
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958808
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM2PV1834154
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T02:49:15Z
    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 0x8c6948a798c169b405856d73b7e5c19048d4a199c6ca35674617a236aa59ab4f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QM2PV1834154.
      date published: 2026-07-20T02:49:15Z
    audio: Summer Moments
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 102.01
      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: 0.769
      additional property: Energy
        type: PropertyValue
        value: 0.901
      additional property: Speechiness
        type: PropertyValue
        value: 0.049
      additional property: Acousticness
        type: PropertyValue
        value: 0.405
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.897
      additional property: Liveness
        type: PropertyValue
        value: 0.189
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.471
      additional property: Loudness (dB)
        type: PropertyValue
        value: -3.719
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Stories
  type: MusicAlbum
  date published: 2018-09-13
album: Travel the World
  type: MusicAlbum
  date published: 2018-09-13
album: Feel Free
  type: MusicAlbum
  date published: 2018-09-13
  track: Feel Free
    type: MusicRecording
    duration: PT3M0S
    duration ms: 180906
    explicit: false
    by artist: Del
    in album: Feel Free
      type: MusicAlbum
      date published: 2018-09-13
    isrc code: QM2PV1836039
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T16:37:21+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x36ea1c3b1e29f33be0b4a6c942e16553d1ddd07c0932671ea5452f804e7caae2
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM2PV1836039
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0x36ea1c3b1e29f33be0b4a6c942e16553d1ddd07c0932671ea5452f804e7caae2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM2PV1836039.
      date published: 2026-07-05T01:12:41Z
    audio: Feel Free
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 102.01
      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: Life Goes On
album: Nello
album: Wild Spirit
album: New Beginning
album: Deep
album: Obsession
album: Delicate Beats
album: Tropical Traveller
album: Summertime Vibes
album: Endless Summer
album: I Don't Wanna Be
album: Sometimes
album: Miami
album: Lost in the Shadows
album: Colors
album: Destiny
album: Wake Up
album: Tropical Power
album: Atmos
album: Summer Nights
album: No Sleep
album: infinity
album: fly away
album: All i want for Summer
album: 30 Degrees
album: Harmony
album: 5 Chords
album: You
album: Pantheon

Musical Key
type: PropertyValue
value: 4

Mode (Major/Minor)
type: PropertyValue
value: 0

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.673

Energy
type: PropertyValue
value: 0.565

Speechiness
type: PropertyValue
value: 0.037

Acousticness
type: PropertyValue
value: 0.146

Instrumentalness
type: PropertyValue
value: 0.761

Liveness
type: PropertyValue
value: 0.113

Valence (Positivity)
type: PropertyValue
value: 0.036

Loudness (dB)
type: PropertyValue
value: -9.847

Key Name
type: PropertyValue
value: E

Mode Name
type: PropertyValue
value: Minor

Life Goes On
type: MusicAlbum
date published: 2018-09-13
track: Life Goes On
  type: MusicRecording
  duration: PT3M11S
  duration ms: 191822
  explicit: false
  by artist: Del
  in album: Life Goes On
    type: MusicAlbum
    date published: 2018-09-13
  isrc code: QM2PV1835438
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T23:56:03+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x3628795dbc824756da310e3e100194058ce0175f4562fbd50c9c2c234a83f12e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956857
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956857
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM2PV1835438
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-06T01:26:17Z
  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 0x3628795dbc824756da310e3e100194058ce0175f4562fbd50c9c2c234a83f12e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM2PV1835438.
    date published: 2026-07-06T01:26:17Z
  audio: Life Goes On
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 122.022
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.807
    additional property: Energy
      type: PropertyValue
      value: 0.803
    additional property: Speechiness
      type: PropertyValue
      value: 0.153
    additional property: Acousticness
      type: PropertyValue
      value: 0.014
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.566
    additional property: Liveness
      type: PropertyValue
      value: 0.078
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.52
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.8
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Nello
type: MusicAlbum
date published: 2018-09-13

Wild Spirit
type: MusicAlbum
date published: 2018-10-16

New Beginning
type: MusicAlbum
date published: 2018-12-13

Deep
type: MusicAlbum
date published: 2019-01-25

Cold Sun
type: MusicAlbum
date published: 2019-01-25

Obsession
type: MusicAlbum
date published: 2019-02-22

Delicate Beats
type: MusicAlbum
date published: 2019-04-09

Tropical Traveller
type: MusicAlbum
date published: 2019-04-16

Summertime Vibes
type: MusicAlbum
date published: 2019-05-16

Endless Summer
type: MusicAlbum
date published: 2019-08-01

I Don't Wanna Be
type: MusicAlbum
date published: 2019-08-21

Sometimes
type: MusicAlbum
date published: 2019-09-11

Miami
type: MusicAlbum
date published: 2019-10-12

Lost in the Shadows
type: MusicAlbum
date published: 2019-11-17

Colors
type: MusicAlbum
date published: 2019-12-26

Destiny
type: MusicAlbum
date published: 2020-02-23

Wake Up
type: MusicAlbum
date published: 2020-04-17

Tropical Power
type: MusicAlbum
date published: 2020-08-11

Atmos
type: MusicAlbum
date published: 2020-11-07

Summer Nights
type: MusicAlbum
date published: 2021-07-01

No Sleep
type: MusicAlbum
date published: 2021-12-27

infinity
type: MusicAlbum
date published: 2022-01-14

fly away
type: MusicAlbum
date published: 2022-01-23

All i want for Summer
type: MusicAlbum
date published: 2022-02-21

30 Degrees
type: MusicAlbum
date published: 2022-08-07

Harmony
type: MusicAlbum
date published: 2022-08-30

5 Chords
type: MusicAlbum
date published: 2022-09-22

You
type: MusicAlbum
date published: 2022-10-07

Pantheon
type: MusicAlbum
date published: 2025-10-29