Lean
type: MusicGroup
description: Lean, leaning or LEAN may refer to: Business practices Lean thinking, a business methodology adopted in various fields Lean construction, an adaptation of lean manufacturing principles to the desig
popularity: 19
followers: 2943
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  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
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  date published: 2026-06-14T09:00:45Z
album: Head in the Clouds
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  date published: 2016
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    by artist: Lean
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      date published: 2016
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      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
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      date published: 2026-07-03T19:59:51Z
    audio: Head in the Clouds
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album: Lucid Dreams
  type: MusicAlbum
  date published: 2016-12-19
album: Lucid Dreams
  type: MusicAlbum
  date published: 2016-12-19
album: Lucid Dreams
  type: MusicAlbum
  date published: 2016-12-19
album: Come Back
  type: MusicAlbum
  date published: 2017-07-07
album: Come Back
  type: MusicAlbum
  date published: 2017-07-07
album: Come Back
  type: MusicAlbum
  date published: 2017-07-07
album: Years
  type: MusicAlbum
  date published: 2017-09-27
album: Years
  type: MusicAlbum
  date published: 2017-09-27
album: Heatwave
  type: MusicAlbum
  date published: 2017-12-15
album: Hurt a Little
  type: MusicAlbum
  date published: 2018-02-15
album: Hurt a Little
  type: MusicAlbum
  date published: 2018-02-16
album: Inaction
  type: MusicAlbum
  date published: 2018-03-22
album: Inaction
  type: MusicAlbum
  date published: 2018-03-22
album: Inaction
  type: MusicAlbum
  date published: 2018-03-22
album: On the Fence
  type: MusicAlbum
  date published: 2018-04-23
album: On the Fence
  type: MusicAlbum
  date published: 2018-04-23
album: On the Fence
  type: MusicAlbum
  date published: 2018-04-23
album: Years
  type: MusicAlbum
  date published: 2018-05-25
album: Years (Edited Version)
  type: MusicAlbum
  date published: 2018-05-25
  track: Come Back
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      date published: 2018-05-25
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    subject of: OpenTimestamps Proof of Existence
    audio: Come Back
album: Head In The Clouds
album: At Least I Tried
album: Killing the Sound
album: Contrast
album: Heatwave (2020 Version)
album: Alive on the Outside
album: Thanks for the Ride

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OTSVerifyInstructions
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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

OpenTimestamps Proof of Existence
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encoding format: application/vnd.opentimestamps.ots
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date published: 2026-07-03T00:42:11Z

Come Back
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Years (Edited Version)
type: MusicAlbum
date published: 2018-05-25

Years
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date published: 2018-05-25

Head In The Clouds
type: MusicAlbum
date published: 2018-11-02

Head in the Clouds
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date published: 2018-11-02

At Least I Tried
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date published: 2019-08-30

At Least I Tried
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date published: 2019-08-30

At Least I Tried
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date published: 2019-08-30

Killing the Sound
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date published: 2020-02-21

Killing the Sound
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date published: 2020-02-21

Contrast
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date published: 2020-04-10

Contrast
type: MusicAlbum
date published: 2020-04-10

Heatwave (2020 Version)
type: MusicAlbum
date published: 2020-06-05

Heatwave (2020 Version)
type: MusicAlbum
date published: 2020-06-05
track: Heatwave (2020 Version)
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  duration: PT3M8S
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    date published: 2020-06-05
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    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
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    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca4d2677386f1e6146ae8e462cc4797faddcf68602168bd60b100bd5028b72b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:07:14Z), 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/USA2P2020396.
    date published: 2026-07-21T23:07:14Z
  audio: Heatwave (2020 Version)
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Alive on the Outside
type: MusicAlbum
date published: 2022-05-06

Alive on the Outside
type: MusicAlbum
date published: 2022-05-06

Thanks for the Ride
type: MusicAlbum
date published: 2022-10-07