Sleep Cycle
type: MusicGroup
description: thumb|345px|Sample hypnogram showing one sleep cycle (the first of the night) from NREM through REM The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It is
popularity: 8
followers: 127
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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: 2026-06-21T10:35:31Z
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  track: Terrific Titan
    type: MusicRecording
    duration: PT3M56S
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    by artist: Sleep Cycle
    in album: Terrific Titan
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    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Terrific Titan
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Sleep Cycle
type: MusicGroup

Terrific Titan
type: MusicAlbum
date published: 2023-11-24

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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
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0576d2eb1ef71377077949a6a354b3bfacba85ab685c23b47d91eae711d734eb. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZZ8A2372014.
date published: 2026-07-17T04:32:48Z

Terrific Titan
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additional property: Tempo (BPM)
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additional property: Speechiness
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additional property: Valence (Positivity)
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additional property: Loudness (dB)
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additional property: Key Name
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  value: C#
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Mad Micro
type: MusicAlbum
date published: 2024-01-19

The Last Moment
type: MusicAlbum
date published: 2024-02-16

Redemption
type: MusicAlbum
date published: 2024-03-29

Reflection
type: MusicAlbum
date published: 2024-05-17

Inferno
type: MusicAlbum
date published: 2024-06-28

Cheap Space
type: MusicAlbum
date published: 2024-08-15
track: Cheap Space
  type: MusicRecording
  duration: PT4M12S
  duration ms: 252298
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  by artist: Sleep Cycle
  in album: Cheap Space
    type: MusicAlbum
    date published: 2024-08-15
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  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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b1978396c27c92fcece6eee9ed4d74456c25e24631a83d532750a9a93547b0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWV32418329.
    date published: 2026-07-17T00:53:26Z
  audio: Cheap Space
    type: AudioObject
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
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type: MusicAlbum
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