Sour Cream
type: MusicGroup
genre: medieval
description: thumb|Bowl of chili with sour cream and cheese thumb|Crisp potato skins with sour cream and chili sauce thumb| Mixed berries with sour cream and brown sugar Sour cream (sometimes known as soured cre
popularity: 3
followers: 150
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf5025157dd332b62683da1be0954a3744a548b67dfd14dd38b592b468743569b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953851
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953851
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/021a9840-60f2-4cc7-8df2-1d1c9b923e4f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/021a9840-60f2-4cc7-8df2-1d1c9b923e4f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/021a9840-60f2-4cc7-8df2-1d1c9b923e4f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T23:06:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf5025157dd332b62683da1be0954a3744a548b67dfd14dd38b592b468743569b","name":"Sour Cream","registered_at":"2026-06-15T14:16:18Z","symbol":"NIM0734091","token_address":"0xdf67f46e0216c8d8af270eb91f3e00525af60d94","type":"artist","uuid":"021a9840-60f2-4cc7-8df2-1d1c9b923e4f"}
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 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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5025157dd332b62683da1be0954a3744a548b67dfd14dd38b592b468743569b. Chain 2 (Bitcoin): anchored in block 953851 (2026-06-15T23:06:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/021a9840-60f2-4cc7-8df2-1d1c9b923e4f.json and https://artists.proofprofile.net/proofs/artist/021a9840-60f2-4cc7-8df2-1d1c9b923e4f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T23:06:35Z
  text: {"copyright_id":"0xf5025157dd332b62683da1be0954a3744a548b67dfd14dd38b592b468743569b","name":"Sour Cream","registered_at":"2026-06-15T14:16:18Z","symbol":"NIM0734091","token_address":"0xdf67f46e0216c8d8af270eb91f3e00525af60d94","type":"artist","uuid":"021a9840-60f2-4cc7-8df2-1d1c9b923e4f"}
album: Henry VIII & La Musica Speculativa [The Baldwine Manuscript]
  type: MusicAlbum
  date published: 1980-11-20
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  type: MusicAlbum
  date published: 2013-06-25
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  type: MusicAlbum
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  date published: 2019-11-22