The Solfeggio Experience
type: MusicGroup
popularity: 27
followers: 531
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1df720e5d1e69e19713b1bbf0f4324e47bf776eeb874b56748859e323c0334d2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dadc40d2-8aa5-4f01-887b-ae9d17f708cf.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dadc40d2-8aa5-4f01-887b-ae9d17f708cf.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/dadc40d2-8aa5-4f01-887b-ae9d17f708cf
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1df720e5d1e69e19713b1bbf0f4324e47bf776eeb874b56748859e323c0334d2","name":"The Solfeggio Experience","registered_at":"2026-06-12T11:13:52Z","symbol":"NIM0280635","token_address":"0xc23db4e084b5fb7546e6da88d4c57281ef03abed","type":"artist","uuid":"dadc40d2-8aa5-4f01-887b-ae9d17f708cf"}
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 0x1df720e5d1e69e19713b1bbf0f4324e47bf776eeb874b56748859e323c0334d2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dadc40d2-8aa5-4f01-887b-ae9d17f708cf.json and https://artists.proofprofile.net/proofs/artist/dadc40d2-8aa5-4f01-887b-ae9d17f708cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0x1df720e5d1e69e19713b1bbf0f4324e47bf776eeb874b56748859e323c0334d2","name":"The Solfeggio Experience","registered_at":"2026-06-12T11:13:52Z","symbol":"NIM0280635","token_address":"0xc23db4e084b5fb7546e6da88d4c57281ef03abed","type":"artist","uuid":"dadc40d2-8aa5-4f01-887b-ae9d17f708cf"}
album: 528 Hz Transformation & Miracles DNA Repair (The Solar Plexus Chakra)
  type: MusicAlbum
  date published: 2020-09-23
album: 396 Hz Liberating Guilt & Fear (The Root Chakra)
  type: MusicAlbum
  date published: 2020-10-16
album: 396 Hz Liberating Guilt & Fear (The Root Chakra)
  type: MusicAlbum
  date published: 2020-10-16
album: The Peaceful Path (Orchestral Solfeggio Sounds)
  type: MusicAlbum
  date published: 2020-10-19
album: 396 Hz Liberating Guilt & Fear (The Root Chakra)
  type: MusicAlbum
  date published: 2020-10-26
album: 396 Hz Liberating Guilt & Fear (The Root Chakra)
  type: MusicAlbum
  date published: 2020-10-26
album: 417 Hz Undoing Situations & Facilitating Change (The Sacral Chakra)
  type: MusicAlbum
  date published: 2020-10-27
album: 417 Hz Undoing Situations & Facilitating Change (Sacral Chakra)
  type: MusicAlbum
  date published: 2020-10-27
album: 417 Hz Undoing Situations & Facilitating Change (Sacral Chakra)
  type: MusicAlbum
  date published: 2020-10-27
album: 417 Hz Undoing Situations & Facilitatin Change (Sacral Chakra)
  type: MusicAlbum
  date published: 2020-10-27
album: 528 Hz Transformation & Miracles DNA Repair (The Solar Plexus Chakra)
  type: MusicAlbum
  date published: 2020-10-28
album: 528 Hz Transformation & Miracles DNA Repair (The Solar Plexus Chakra)
  type: MusicAlbum
  date published: 2020-10-28
album: 528 Hz Transformation & Miracles DNA Repair (The Solar Plexus Chakra)
  type: MusicAlbum
  date published: 2020-10-28
album: 528 Hz Transformation & Miracles DNA Repair (The Solar Plexus Chakra)
  type: MusicAlbum
  date published: 2020-10-28
album: 528 Hz Solfeggio Frequency
  type: MusicAlbum
  date published: 2020-10-28
album: 528 Hz Transformation & Miracles DNA Repair (The Solar Plexus Chakra)
  type: MusicAlbum
  date published: 2020-10-28
album: 528 Hz Transformation & Miracles DNA Repair (The Solar Plexus Chakra)
  type: MusicAlbum
  date published: 2020-10-28
album: 639 Hz Harmonize Relationships & Attract Love (The Heart Chakra)
  type: MusicAlbum
  date published: 2020-10-29
album: 639 Hz Harmonize Relationships & Attract Love (The Heart Chakra)
  type: MusicAlbum
  date published: 2020-10-29
album: 639 Hz Solfeggio Frequency
  type: MusicAlbum
  date published: 2020-10-29
album: 639 Hz Harmonize Relationships & Attract Love (The Heart Chakra)
  type: MusicAlbum
  date published: 2020-10-29
album: 639 Hz Harmonize Relationships & Attract Love (The Heart Chakra)
  type: MusicAlbum
  date published: 2020-10-29
album: 741 Hz Purify Body & Spirit (The Throat Chakra)
  type: MusicAlbum
  date published: 2020-10-30
album: 741 Hz Purify Body & Spirit (The Throat Chakra)
  type: MusicAlbum
  date published: 2020-10-30
album: 741 Hz Solfeggio Frequency
  type: MusicAlbum
  date published: 2020-10-30
album: 741 Hz Purify Body & Spirit (The Throat Chakra)
  type: MusicAlbum
  date published: 2020-10-30
album: 741 Hz Purify Body & Spirit (The Throat Chakra)
  type: MusicAlbum
  date published: 2020-10-30
album: 852 Hz Returning To Spiritual Order (The Third Eye Chakra)
  type: MusicAlbum
  date published: 2020-10-31
album: 852 Hz Returning To Spiritual Order (The Third Eye Chakra)
  type: MusicAlbum
  date published: 2020-10-31
album: 852 Hz Returning To Spiritual Order (The Third Eye Chakra)
  type: MusicAlbum
  date published: 2020-10-31
album: 852 Hz Returning To Spiritual Order (The Third Eye Chakra)
  type: MusicAlbum
  date published: 2020-10-31
album: 963 Hz Connect with Light & Spirit (The Crown Chakra)
  type: MusicAlbum
  date published: 2020-11-01
album: 963 Hz Connect With Light & Spirit (The Crown Chakra)
  type: MusicAlbum
  date published: 2020-11-01
album: 963 Hz Solfeggio Frequency
  type: MusicAlbum
  date published: 2020-11-01
album: 963 Hz Connect With Light & Spirit (The Crown Chakra)
  type: MusicAlbum
  date published: 2020-11-01
album: Spiritual Awakening (174 Hz - 963 Hz Solfeggio Frequencies)
  type: MusicAlbum
  date published: 2020-11-12
album: 285 Hz Rejuvenated Energy Fields
  type: MusicAlbum
  date published: 2021-02-26
album: 528 Hz Solfeggio Meditation
  type: MusicAlbum
  date published: 2021-04-04
album: 417 Hz Solfeggio Meditation
  type: MusicAlbum
  date published: 2021-04-04
album: 639 Hz Solfeggio Meditation
  type: MusicAlbum
  date published: 2021-04-04
album: 639 Hz Solfeggio Meditation
  type: MusicAlbum
  date published: 2021-04-04
album: 639 Hz Solfeggio Meditation
  type: MusicAlbum
  date published: 2021-04-04
album: 417 Hz Solfeggio Meditation
  type: MusicAlbum
  date published: 2021-04-04
album: 528 Hz Solfeggio Meditation
  type: MusicAlbum
  date published: 2021-04-04
album: 528 Hz Solfeggio Meditation
  type: MusicAlbum
  date published: 2021-04-04
album: 639 Hz Solfeggio Meditation
  type: MusicAlbum
  date published: 2021-04-04
album: Reduces Pain (174 Hz)
  type: MusicAlbum
  date published: 2021-05-28
album: 174 Hz (Reduces Pain)
  type: MusicAlbum
  date published: 2021-05-28
album: Spiritual Awakening (174 Hz to 963 Hz Solfeggio Frequencies)
  type: MusicAlbum
  date published: 2021-05-29
album: Spiritual Awakening (174 Hz to 963 Hz Solfeggio Frequencies)
  type: MusicAlbum
  date published: 2021-05-29
album: Spiritual Awakening (174 Hz to 963 Hz Solfeggio Frequencies))
  type: MusicAlbum
  date published: 2021-05-29
album: 417 Hz Solfeggio Meditation
  type: MusicAlbum
  date published: 2021-07-13
album: 417 Hz Solfeggio Meditation
  type: MusicAlbum
  date published: 2021-07-13
album: Stalactite Cave - Pure Solfeggio Frequencies (174 Hz - 963 Hz)
  type: MusicAlbum
  date published: 2021-07-20
album: 528 Hz Solfeggio Frequency: Healing Solfeggio Frequencies
album: Water Harmony: Serene Musical Tunes
album: 174 Hz Full Body Healing
album: 852 Hz: Let Go of Self-Doubt
album: 963 Hz Spiritual Family
album: Ocean's Riff: Music for Seashore Vibes
album: 432 Hz: Law of Attraction
album: 174 to 963 Hz: Connect Yourself to Universe
album: 285 Hz Tissue Regeneration
album: 396 Hz Dissolve Negativity
album: 417 Hz Unleash Inner Courage

285 Hz Rejuvenated Energy Fields
type: MusicAlbum
date published: 2023-04-07

285 Hz Rejuvenated Energy Fields
type: MusicAlbum
date published: 2023-04-07

528 Hz Solfeggio Frequency: Healing Solfeggio Frequencies
type: MusicAlbum
date published: 2023-12-22

528 Hz Solfeggio Frequency: Healing Solfeggio Frequencies
type: MusicAlbum
date published: 2023-12-22

Water Harmony: Serene Musical Tunes
type: MusicAlbum
date published: 2024-06-07

174 Hz Full Body Healing
type: MusicAlbum
date published: 2024-06-07

852 Hz: Let Go of Self-Doubt
type: MusicAlbum
date published: 2024-06-18

963 Hz Spiritual Family
type: MusicAlbum
date published: 2024-06-19

Ocean's Riff: Music for Seashore Vibes
type: MusicAlbum
date published: 2024-06-21

432 Hz: Law of Attraction
type: MusicAlbum
date published: 2024-06-22

174 to 963 Hz: Connect Yourself to Universe
type: MusicAlbum
date published: 2024-06-26

285 Hz Tissue Regeneration
type: MusicAlbum
date published: 2024-07-05

396 Hz Dissolve Negativity
type: MusicAlbum
date published: 2024-08-02

417 Hz Unleash Inner Courage
type: MusicAlbum
date published: 2024-08-23

639 Hz Love Manifestation
type: MusicAlbum
date published: 2024-08-30

528 Hz DNA Repair
type: MusicAlbum
date published: 2024-09-06

741 Hz Body Detox
type: MusicAlbum
date published: 2024-09-20

528 Hz Transformation
type: MusicAlbum
date published: 2024-10-09

285 Hz: Detox Energy Fields
type: MusicAlbum
date published: 2024-11-22

285 Hz: Detox Energy Fields
type: MusicAlbum
date published: 2024-11-22

639 Hz ATTRACT LOVE
type: MusicAlbum
date published: 2025-02-26
track: 639 Hz Abundance Gate
  type: MusicRecording
  duration: PT2M26S
  duration ms: 146548
  explicit: false
  by artist: The Solfeggio Experience
  in album: 639 Hz ATTRACT LOVE
    type: MusicAlbum
    date published: 2025-02-26
  isrc code: DE1AK5229736
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T22:06:52+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xcc7ff1182db0f8b1b76fe40699b4b470fd92baa6ebccc9d2e1bc64594b5739c0
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959071
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959071
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1AK5229736
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-22T01:05:49Z
  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 0xcc7ff1182db0f8b1b76fe40699b4b470fd92baa6ebccc9d2e1bc64594b5739c0. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:05:49Z), 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/DE1AK5229736.
    date published: 2026-07-22T01:05:49Z
  audio: 639 Hz Abundance Gate
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 76.573
    additional property: Musical Key
      type: PropertyValue
      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.175
    additional property: Energy
      type: PropertyValue
      value: 0.021
    additional property: Speechiness
      type: PropertyValue
      value: 0.044
    additional property: Acousticness
      type: PropertyValue
      value: 0.981
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.959
    additional property: Liveness
      type: PropertyValue
      value: 0.126
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.034
    additional property: Loudness (dB)
      type: PropertyValue
      value: -29.917
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Major

Body Chakras: All 9 Solfeggio Frequencies
type: MusicAlbum
date published: 2025-03-21
track: 417 Hz Above Situations
  type: MusicRecording
  duration: PT2M32S
  duration ms: 152920
  explicit: false
  by artist: The Solfeggio Experience
  in album: Body Chakras: All 9 Solfeggio Frequencies
    type: MusicAlbum
    date published: 2025-03-21
  isrc code: DE1AK5230005
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x38858a607f786dd674cbafc18a4c9ebf4a884a40debe0b61991feb48e0342b05
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959037
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959037
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1AK5230005
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T16:59:47Z
  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 0x38858a607f786dd674cbafc18a4c9ebf4a884a40debe0b61991feb48e0342b05. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DE1AK5230005.
    date published: 2026-07-21T16:59:47Z
  audio: 417 Hz Above Situations
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 70.926
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.211
    additional property: Energy
      type: PropertyValue
      value: 0.128
    additional property: Speechiness
      type: PropertyValue
      value: 0.044
    additional property: Acousticness
      type: PropertyValue
      value: 0.983
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.946
    additional property: Liveness
      type: PropertyValue
      value: 0.133
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.04
    additional property: Loudness (dB)
      type: PropertyValue
      value: -24.653
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: 528 Hz Transformation and Miracles
  type: MusicRecording
  duration: PT2M58S
  duration ms: 178407
  explicit: false
  by artist: The Solfeggio Experience
  in album: Body Chakras: All 9 Solfeggio Frequencies
    type: MusicAlbum
    date published: 2025-03-21
  isrc code: DE1AK5230006
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-23T23:18:37+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xa71349025b5b017531fb34bf0f1487cb6becc63ddf1f5721749b3d2c97fbef10
  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/DE1AK5230006
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71349025b5b017531fb34bf0f1487cb6becc63ddf1f5721749b3d2c97fbef10. 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/DE1AK5230006.
    date published: 2026-07-06T01:26:17Z
  audio: 528 Hz Transformation and Miracles
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 75.825
    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: 0.093
    additional property: Energy
      type: PropertyValue
      value: 0.155
    additional property: Speechiness
      type: PropertyValue
      value: 0.043
    additional property: Acousticness
      type: PropertyValue
      value: 0.994
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.828
    additional property: Liveness
      type: PropertyValue
      value: 0.126
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.04
    additional property: Loudness (dB)
      type: PropertyValue
      value: -23.26
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Body Chakras: All 9 Solfeggio Frequencies
type: MusicAlbum
date published: 2025-03-21

396 Hz VIBRATIONS
type: MusicAlbum
date published: 2025-04-11

417 Hz Find Inner Balance
type: MusicAlbum
date published: 2025-05-02

Pure 432 Hz Solfeggio Frequency
type: MusicAlbum
date published: 2025-05-06

Nikola Tesla: 369 639 963 Hz
type: MusicAlbum
date published: 2025-05-17

741 Hz Dissolve Toxins
type: MusicAlbum
date published: 2025-07-02

174Hz Yoga Music - Harmony & Inner Balance
type: MusicAlbum
date published: 2025-08-22