thumb|Detail of a dish depicting Aspar and his elder son Ardabur ( 434). Flavius Ardabur Aspar (Greek: Ἄσπαρ, fl. 400471) was an Eastern Roman patrician and magister militum ("master of soldiers") of
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 0x168987a75a4b97e5e9b707adba3e49b724e8139b2e5d39580d1f395adf1eced6. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03aa271c-7391-404b-9807-2802172c9e46.json and https://artists.proofprofile.net/proofs/artist/03aa271c-7391-404b-9807-2802172c9e46.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).