Babylonia (; , ) was an ancient Akkadian-speaking state and cultural area based on the city of Babylon in central-southern Mesopotamia (present-day Iraq and parts of Syria). It emerged as an Akkadian-
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 0x468bafcc189def3fbdd324e40006aed4c4f47bfc53530152b39f8d8726ad3cba. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/207bb73a-34af-41e2-b501-bd351a1f9e30.json and https://artists.proofprofile.net/proofs/artist/207bb73a-34af-41e2-b501-bd351a1f9e30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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