Los Angeles (often referred to by its initials, LA) is the most populous city in the U.S. state of California, and the commercial, financial, and cultural center of Southern California. With an estima
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 0x8270d8fa060c522c4e87f64f4b5ffb76f408a451fd2e28e5eff946916e029ca2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87f04669-2865-4cec-b36a-840c92b4e8ae.json and https://artists.proofprofile.net/proofs/artist/87f04669-2865-4cec-b36a-840c92b4e8ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).