Hijos del Sofá
type: MusicGroup
genre: argentine rock
genre: latin indie
popularity: 2
followers: 655
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x382e2e4067af1b15e8d9c1d002efb8470f39fc5f980a9ade69e644f8b8937efa
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5949e744-db5f-42b8-9938-5e6cd4e47624.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5949e744-db5f-42b8-9938-5e6cd4e47624.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5949e744-db5f-42b8-9938-5e6cd4e47624
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x382e2e4067af1b15e8d9c1d002efb8470f39fc5f980a9ade69e644f8b8937efa","name":"Hijos del Sofá","registered_at":"2026-06-16T20:41:48Z","symbol":"NIM1169786","token_address":"0x5d9b7adbef7a99a3a7bd774343b83672f2b06679","type":"artist","uuid":"5949e744-db5f-42b8-9938-5e6cd4e47624"}
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 0x382e2e4067af1b15e8d9c1d002efb8470f39fc5f980a9ade69e644f8b8937efa. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5949e744-db5f-42b8-9938-5e6cd4e47624.json and https://artists.proofprofile.net/proofs/artist/5949e744-db5f-42b8-9938-5e6cd4e47624.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x382e2e4067af1b15e8d9c1d002efb8470f39fc5f980a9ade69e644f8b8937efa","name":"Hijos del Sofá","registered_at":"2026-06-16T20:41:48Z","symbol":"NIM1169786","token_address":"0x5d9b7adbef7a99a3a7bd774343b83672f2b06679","type":"artist","uuid":"5949e744-db5f-42b8-9938-5e6cd4e47624"}
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  type: MusicAlbum
  date published: 2014-04-25
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  date published: 2018-10-19
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  date published: 2019-03-01
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