OAO, a three-letter acronym, may stand for: Orbiting Astronomical Observatory, the name of four NASA scientific satellites Open joint-stock company (), a former type of business incorporation in Russi
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 0xdb1d5489ca8803a42d86bae8b819490bac3098ff389fe5bfafb923ea6ad665b0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3067d25f-3689-4136-9cb5-ed5580d2264c.json and https://artists.proofprofile.net/proofs/artist/3067d25f-3689-4136-9cb5-ed5580d2264c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).