El da Sensei
type: MusicGroup
description: William E. Williams, also known as El Da Sensei is an American rapper from Newark, New Jersey. During the 1990s he was a member of the hip-hop duo, Artifacts. Since then he has released several solo
popularity: 5
followers: 10
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb7a57e20cb92e82c2878b08fe3986ce69bd5762fe32794d26eac538f3d38f23e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c9d59309-b32e-4539-9b8d-0878f5a539f3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c9d59309-b32e-4539-9b8d-0878f5a539f3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c9d59309-b32e-4539-9b8d-0878f5a539f3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb7a57e20cb92e82c2878b08fe3986ce69bd5762fe32794d26eac538f3d38f23e","name":"El da Sensei","registered_at":"2026-06-20T22:44:44Z","symbol":"NIM1734573","token_address":"0x0d93856c35735870088f3c9c3c91036905ca1616","type":"artist","uuid":"c9d59309-b32e-4539-9b8d-0878f5a539f3"}
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 0xb7a57e20cb92e82c2878b08fe3986ce69bd5762fe32794d26eac538f3d38f23e. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9d59309-b32e-4539-9b8d-0878f5a539f3.json and https://artists.proofprofile.net/proofs/artist/c9d59309-b32e-4539-9b8d-0878f5a539f3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xb7a57e20cb92e82c2878b08fe3986ce69bd5762fe32794d26eac538f3d38f23e","name":"El da Sensei","registered_at":"2026-06-20T22:44:44Z","symbol":"NIM1734573","token_address":"0x0d93856c35735870088f3c9c3c91036905ca1616","type":"artist","uuid":"c9d59309-b32e-4539-9b8d-0878f5a539f3"}