Urfriend
type: MusicGroup
genre: lo-fi
popularity: 10
followers: 484
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0f7d32282562a5e2d06708b7c35211be51190eb4716c25f298508f0fb19b5c87
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953982
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953982
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2cf5ef8c-342a-4a74-baec-3e0cc1152aaa.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2cf5ef8c-342a-4a74-baec-3e0cc1152aaa.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2cf5ef8c-342a-4a74-baec-3e0cc1152aaa
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T17:42:23Z
additional property: OTSCanonicalRecord
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 0x0f7d32282562a5e2d06708b7c35211be51190eb4716c25f298508f0fb19b5c87. Chain 2 (Bitcoin): anchored in block 953982 (2026-06-16T17:42:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cf5ef8c-342a-4a74-baec-3e0cc1152aaa.json and https://artists.proofprofile.net/proofs/artist/2cf5ef8c-342a-4a74-baec-3e0cc1152aaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T17:42:23Z
album: Gentle Rain
  type: MusicAlbum
  date published: 2020-08-05
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  type: MusicAlbum
  date published: 2020-10-08
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  type: MusicAlbum
  date published: 2020-11-18
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  type: MusicAlbum
  date published: 2020-12-18
album: Wabi-Sabi
  type: MusicAlbum
  date published: 2021-04-07
album: Fresh Air
  type: MusicAlbum
  date published: 2021-10-29
album: Fresh Air
  type: MusicAlbum
  date published: 2021-10-29
album: Until Tomorrow
  type: MusicAlbum
  date published: 2021-11-23
album: Take Time To Smell The Flowers
  type: MusicAlbum
  date published: 2022-04-01
album: Lazy Morning
  type: MusicAlbum
  date published: 2022-04-08
album: Patiently Waiting
  type: MusicAlbum
  date published: 2022-06-20
album: 4:19
  type: MusicAlbum
  date published: 2022-10-26
album: off season
  type: MusicAlbum
  date published: 2025-06-05