Timothy John Campbell (January 8, 1840 – April 7, 1904) was an American lawyer and politician from New York. He served four terms in the U.S. House of Representatives during the late 19th century. Li
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 0xff20e31dfa6d8999a403fbe4f112dd4953f0e7d239af6dffb50027230ebc389f. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15beeb4c-94cf-4329-9f7d-01cb8fd2d042.json and https://artists.proofprofile.net/proofs/artist/15beeb4c-94cf-4329-9f7d-01cb8fd2d042.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).