Chief may refer to: Title or rank Military and law enforcement Chief master sergeant, the ninth, and highest, enlisted rank in the U.S. Air Force and U.S. Space Force Chief of police, the hea
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13acfa6f00d70e1bab9bb736eac735549fba0d4e474ee8a3da7585ca08543cf5. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17e0458c-e2df-4218-9bc4-04441e694a69.json and https://artists.proofprofile.net/proofs/artist/17e0458c-e2df-4218-9bc4-04441e694a69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).