Memphis Slim
type: MusicGroup
genre: blues
genre: classic blues
description: John Len Chatman (September 3, 1915 – February 24, 1988), known professionally as Memphis Slim, was an American blues pianist, singer, and composer. He led a series of bands that, reflecting the popu
popularity: 21
followers: 782
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x653130c164290ab501799cc778a5fbe898143b78d8a3dfe6df4ea4f722f3a591
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0c5d6a42-7dfe-43b0-a833-60e5f21c7aa1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0c5d6a42-7dfe-43b0-a833-60e5f21c7aa1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0c5d6a42-7dfe-43b0-a833-60e5f21c7aa1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x653130c164290ab501799cc778a5fbe898143b78d8a3dfe6df4ea4f722f3a591","name":"Memphis Slim","registered_at":"2026-06-11T11:37:33Z","symbol":"NIM0016109","token_address":"0xeac49d73f793fe6f1373ac45ea01917962fde652","type":"artist","uuid":"0c5d6a42-7dfe-43b0-a833-60e5f21c7aa1"}
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 0x653130c164290ab501799cc778a5fbe898143b78d8a3dfe6df4ea4f722f3a591. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c5d6a42-7dfe-43b0-a833-60e5f21c7aa1.json and https://artists.proofprofile.net/proofs/artist/0c5d6a42-7dfe-43b0-a833-60e5f21c7aa1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x653130c164290ab501799cc778a5fbe898143b78d8a3dfe6df4ea4f722f3a591","name":"Memphis Slim","registered_at":"2026-06-11T11:37:33Z","symbol":"NIM0016109","token_address":"0xeac49d73f793fe6f1373ac45ea01917962fde652","type":"artist","uuid":"0c5d6a42-7dfe-43b0-a833-60e5f21c7aa1"}