Aspero is a well-studied Late Preceramic site archaeological complex located near the mouth of the Supe River, south of Supe Puerto, on the central coast of Peru. It forms part of the ancient Caral-Su
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 0x8b70582aa38f1d00a8c239ee4db89a7866a163fbea233e7359c369087c9e4064. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0478722-182b-494f-8e0b-7831a55cde5d.json and https://artists.proofprofile.net/proofs/artist/f0478722-182b-494f-8e0b-7831a55cde5d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).