UAS may refer to: People Ustad Abdul Somad Education Undergraduate Ambassadors Scheme, UK University of Agricultural Sciences (disambiguation) University of Alaska Southeast University of Alabam
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 0x74a9dae0a1a6a4328570cb87e7f3aae6d9e6921a8c9157ba2a0a16de62f5da02. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca0c62b1-16e4-49ef-9be2-bab09ae2cb43.json and https://artists.proofprofile.net/proofs/artist/ca0c62b1-16e4-49ef-9be2-bab09ae2cb43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).