Chipmunks are small, striped squirrels of subtribe Tamiina. Chipmunks are found in North America, with the exception of the Siberian chipmunk, which is found primarily in Asia. The name "chipmunk" ori
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 0xb6f90991ad0159ae371c0460385c1dac57a033a38e04000b04c80c43e09240d2. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abbac111-bc7c-4240-850e-9cfe33c65992.json and https://artists.proofprofile.net/proofs/artist/abbac111-bc7c-4240-850e-9cfe33c65992.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).