Martijn Stam
type: MusicGroup
popularity: 15
followers: 229
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6eb9f176f3f9101194642adad1cb06b78bbd05bc075c764d8cee6a2664722280
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953699
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953699
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/73ab41a6-bea1-45d8-bcee-5b64e13b8f7a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/73ab41a6-bea1-45d8-bcee-5b64e13b8f7a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/73ab41a6-bea1-45d8-bcee-5b64e13b8f7a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T22:00:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6eb9f176f3f9101194642adad1cb06b78bbd05bc075c764d8cee6a2664722280","name":"Martijn Stam","registered_at":"2026-06-14T16:40:43Z","symbol":"NIM0513229","token_address":"0x861c863ec2e6bfcf06f62928ccb6cdca035398e4","type":"artist","uuid":"73ab41a6-bea1-45d8-bcee-5b64e13b8f7a"}
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 0x6eb9f176f3f9101194642adad1cb06b78bbd05bc075c764d8cee6a2664722280. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73ab41a6-bea1-45d8-bcee-5b64e13b8f7a.json and https://artists.proofprofile.net/proofs/artist/73ab41a6-bea1-45d8-bcee-5b64e13b8f7a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T22:00:24Z
  text: {"copyright_id":"0x6eb9f176f3f9101194642adad1cb06b78bbd05bc075c764d8cee6a2664722280","name":"Martijn Stam","registered_at":"2026-06-14T16:40:43Z","symbol":"NIM0513229","token_address":"0x861c863ec2e6bfcf06f62928ccb6cdca035398e4","type":"artist","uuid":"73ab41a6-bea1-45d8-bcee-5b64e13b8f7a"}
album: Leef
  type: MusicAlbum
  date published: 2015-04-13
  track: Leef
    type: MusicRecording
    duration: PT2M28S
    duration ms: 148000
    explicit: false
    by artist: Martijn Stam
    in album: Leef
      type: MusicAlbum
      date published: 2015-04-13
    isrc code: NLW2R1714376
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T05:33:49+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xbb6813adf2fb2fd5c527899581be3e17ff5932c071003d5c7b7e90b8fbd14f2f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958106
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958106
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLW2R1714376
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T05:35:13Z
    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 0xbb6813adf2fb2fd5c527899581be3e17ff5932c071003d5c7b7e90b8fbd14f2f. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/NLW2R1714376.
      date published: 2026-07-15T05:35:13Z
    audio: Leef
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 127.993
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.738
      additional property: Energy
        type: PropertyValue
        value: 0.969
      additional property: Speechiness
        type: PropertyValue
        value: 0.066
      additional property: Acousticness
        type: PropertyValue
        value: 0.013
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.325
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.663
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.148
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Samen Met Jou
  type: MusicAlbum
  date published: 2016-06-03
album: Samen Met Jou
  type: MusicAlbum
  date published: 2016-06-03
album: Regenboog
  type: MusicAlbum
  date published: 2017-01-27
album: Regenboog
  type: MusicAlbum
  date published: 2017-01-27
album: Avond
  type: MusicAlbum
  date published: 2023-06-16
  track: Avond
    type: MusicRecording
    duration: PT3M26S
    duration ms: 206818
    explicit: false
    by artist: Martijn Stam
    in album: Avond
      type: MusicAlbum
      date published: 2023-06-16
    isrc code: NLL8M2301839
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T20:42:39+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2df798ca691d8f96ba857aef10c34b37f1ed45e6817ee399eadb9306447fef02
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958324
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958324
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLL8M2301839
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T23:44:20Z
    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 0x2df798ca691d8f96ba857aef10c34b37f1ed45e6817ee399eadb9306447fef02. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:44:20Z), 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/NLL8M2301839.
      date published: 2026-07-16T23:44:20Z
    audio: Avond
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 131.973
      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: 0.77
      additional property: Energy
        type: PropertyValue
        value: 0.949
      additional property: Speechiness
        type: PropertyValue
        value: 0.041
      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: Een Groot Feest
album: Avond 2.0

Acousticness
type: PropertyValue
value: 0.279

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.301

Valence (Positivity)
type: PropertyValue
value: 0.962

Loudness (dB)
type: PropertyValue
value: -3.46

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Major

Een Groot Feest
type: MusicAlbum
date published: 2024-06-12

Avond 2.0
type: MusicAlbum
date published: 2025-09-05