Jeff Porcaro
type: MusicGroup
genre: jazz fusion
description: Jeffrey Thomas Porcaro (April 1, 1954 – August 5, 1992) was an American drummer and songwriter. He is best known for being the co-founder and drummer of the rock band Toto, but is also one of the most
popularity: 9
followers: 2911
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9baa7cb8f627fb98554cd5c27525bca84322539760c47595a9a71af713179570
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aaaa11c3-a1b4-499e-acc7-cb33176dd60b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aaaa11c3-a1b4-499e-acc7-cb33176dd60b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/aaaa11c3-a1b4-499e-acc7-cb33176dd60b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9baa7cb8f627fb98554cd5c27525bca84322539760c47595a9a71af713179570","name":"Jeff Porcaro","registered_at":"2026-06-20T09:03:48Z","symbol":"NIM1577295","token_address":"0x7f3bb92590e611c1fafcb616c0f512aaa60946fd","type":"artist","uuid":"aaaa11c3-a1b4-499e-acc7-cb33176dd60b"}
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 0x9baa7cb8f627fb98554cd5c27525bca84322539760c47595a9a71af713179570. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aaaa11c3-a1b4-499e-acc7-cb33176dd60b.json and https://artists.proofprofile.net/proofs/artist/aaaa11c3-a1b4-499e-acc7-cb33176dd60b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T10:56:20Z
  text: {"copyright_id":"0x9baa7cb8f627fb98554cd5c27525bca84322539760c47595a9a71af713179570","name":"Jeff Porcaro","registered_at":"2026-06-20T09:03:48Z","symbol":"NIM1577295","token_address":"0x7f3bb92590e611c1fafcb616c0f512aaa60946fd","type":"artist","uuid":"aaaa11c3-a1b4-499e-acc7-cb33176dd60b"}