Washington most commonly refers to: George Washington (1732–1799), the first president of the United States Washington (state), a state in the Pacific Northwest of the United States Washington, D.
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 0xecab14910f19ac31b8a287a95cb26d8c63f8485e568acf0eb44553bdf9e31a4b. 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/a290dc5c-76d4-4665-baf8-35f1720e6d9f.json and https://artists.proofprofile.net/proofs/artist/a290dc5c-76d4-4665-baf8-35f1720e6d9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).