Big Swoop is a sculpture located in Petrie Plaza, Civic, Australian Capital Territory. The sculpture was funded by a grant from the City Renewal Authority. It depicts an Australian magpie pecking at
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 0x2523aee1f40e7d29cd2cec15e9e35a498272369b5d59259fb8c2c47b7d7525bc. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24896fc3-0367-43a0-a13a-734e2a3ae0f6.json and https://artists.proofprofile.net/proofs/artist/24896fc3-0367-43a0-a13a-734e2a3ae0f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).