Class of '99
type: MusicGroup
description: Class of '99 consisted of members from notable rock bands: Layne Staley of Alice in Chains as vocalist Tom Morello of Rage Against the Machine as lead guitarist Stephen Perkins of Jane's Addiction
popularity: 20
followers: 2873
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6391eb502173ff85ce336f638118ea5a2caeaf5ec25d40bc9da33649e2703bd0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953707
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953707
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7cd98a35-581f-4701-b0ec-6adfd40b1f1a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7cd98a35-581f-4701-b0ec-6adfd40b1f1a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7cd98a35-581f-4701-b0ec-6adfd40b1f1a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T23:22:21Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6391eb502173ff85ce336f638118ea5a2caeaf5ec25d40bc9da33649e2703bd0","name":"Class of '99","registered_at":"2026-06-14T17:38:44Z","symbol":"NIM0527066","token_address":"0x467e8f02102433785e36750ed3a363aa58eb37e8","type":"artist","uuid":"7cd98a35-581f-4701-b0ec-6adfd40b1f1a"}
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 0x6391eb502173ff85ce336f638118ea5a2caeaf5ec25d40bc9da33649e2703bd0. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cd98a35-581f-4701-b0ec-6adfd40b1f1a.json and https://artists.proofprofile.net/proofs/artist/7cd98a35-581f-4701-b0ec-6adfd40b1f1a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T04:47:56Z
  text: {"copyright_id":"0x6391eb502173ff85ce336f638118ea5a2caeaf5ec25d40bc9da33649e2703bd0","name":"Class of '99","registered_at":"2026-06-14T17:38:44Z","symbol":"NIM0527066","token_address":"0x467e8f02102433785e36750ed3a363aa58eb37e8","type":"artist","uuid":"7cd98a35-581f-4701-b0ec-6adfd40b1f1a"}
track: Another Brick In The Wall (Part 2) (feat. Layne Staley, Tom Morello, Stephen Perkins, Martyn LeNoble & Matt Serletic)
track: Another Brick In The Wall (Part 1)

Another Brick In The Wall (Part 2) (feat. Layne Staley, Tom Morello, Stephen Perkins, Martyn LeNoble & Matt Serletic)
type: MusicRecording
duration: PT4M18S
duration ms: 258265
explicit: false
by artist: Class of '99
by artist: Layne Staley
by artist: Tom Morello
by artist: Stephen Perkins
by artist: Martyn Lenoble
by artist: Matt Serletic
in album: The Faculty (Music From The Dimension Motion Picture)
  type: MusicAlbum
  date published: 1998-12-03
isrc code: USSM19805491
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-05T21:52:56+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3cf7ce46b30c3c621aa6cddeb224a4db24fea4625e7bfca80487b119a67514ed
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953513
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19805491
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:47:07Z
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 953513
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-06-13T12:47:07+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf7ce46b30c3c621aa6cddeb224a4db24fea4625e7bfca80487b119a67514ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM19805491.
  date published: 2026-06-13T12:47:07Z
audio: Another Brick In The Wall (Part 2) (feat. Layne Staley, Tom Morello, Stephen Perkins, Martyn LeNoble & Matt Serletic)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 120.759
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.574
  additional property: Energy
    type: PropertyValue
    value: 0.924
  additional property: Speechiness
    type: PropertyValue
    value: 0.044
  additional property: Acousticness
    type: PropertyValue
    value: 0.004
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.091
  additional property: Liveness
    type: PropertyValue
    value: 0.066
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.671
  additional property: Loudness (dB)
    type: PropertyValue
    value: -10.653
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Another Brick In The Wall (Part 1)
type: MusicRecording
duration: PT5M18S
duration ms: 318493
explicit: false
by artist: Class of '99
in album: The Faculty (Music From The Dimension Motion Picture)
  type: MusicAlbum
  date published: 1998-12-03
isrc code: USSM19805493
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-18T02:29:53+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcbe036013ff6f351399ce804e44aa469d81a8bd07c6c38976ed0495cc9caedf7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956302
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956302
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19805493
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:30:09Z
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 956302
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-02T03:30:09+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe036013ff6f351399ce804e44aa469d81a8bd07c6c38976ed0495cc9caedf7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSM19805493.
  date published: 2026-07-02T03:30:09Z
audio: Another Brick In The Wall (Part 1)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 117.361
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.757
  additional property: Energy
    type: PropertyValue
    value: 0.509
  additional property: Speechiness
    type: PropertyValue
    value: 0.036
  additional property: Acousticness
    type: PropertyValue
    value: 0.358
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.902
  additional property: Liveness
    type: PropertyValue
    value: 0.109
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.429
  additional property: Loudness (dB)
    type: PropertyValue
    value: -14.826
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major