4 Sam
type: MusicGroup
genre: k-ballad
popularity: 2
followers: 5
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5db35d0feb6f73082605098303d1ce8d461ce6c275716621e2518b5bc79ace92
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953930
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953930
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e5e6d22-cd17-43fe-8bb6-7f73ae7a3be8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e5e6d22-cd17-43fe-8bb6-7f73ae7a3be8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1e5e6d22-cd17-43fe-8bb6-7f73ae7a3be8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T10:36:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5db35d0feb6f73082605098303d1ce8d461ce6c275716621e2518b5bc79ace92","name":"4 Sam","registered_at":"2026-06-16T00:11:23Z","symbol":"NIM0876087","token_address":"0x3de7000acf624753ab5b09553f09981c929020aa","type":"artist","uuid":"1e5e6d22-cd17-43fe-8bb6-7f73ae7a3be8"}
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 0x5db35d0feb6f73082605098303d1ce8d461ce6c275716621e2518b5bc79ace92. Chain 2 (Bitcoin): anchored in block 953930 (2026-06-16T10:36:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e5e6d22-cd17-43fe-8bb6-7f73ae7a3be8.json and https://artists.proofprofile.net/proofs/artist/1e5e6d22-cd17-43fe-8bb6-7f73ae7a3be8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T10:36:13Z
  text: {"copyright_id":"0x5db35d0feb6f73082605098303d1ce8d461ce6c275716621e2518b5bc79ace92","name":"4 Sam","registered_at":"2026-06-16T00:11:23Z","symbol":"NIM0876087","token_address":"0x3de7000acf624753ab5b09553f09981c929020aa","type":"artist","uuid":"1e5e6d22-cd17-43fe-8bb6-7f73ae7a3be8"}