SGW may refer to: Saginaw Seaplane Base, in Alaska ISO 639-3 code for the Sebat Bet Gurage language, a Gurage language spoken in Ethiopia Serving Gateway, in the System Architecture Evolution stand
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe659b10f44707dbed7a4f05b2216e7b76c0700e1d3a1f2b8f15b112c3d1fe0. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2876220-f591-43f5-9292-42a435e6ab78.json and https://artists.proofprofile.net/proofs/artist/a2876220-f591-43f5-9292-42a435e6ab78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).