thumb|258x258px|Ruins of the Forum of Nerva, completed in 97 The 90s was a decade that ran from January 1, AD 90, to December 31, AD 99. As the decade began, the Han–Xiongnu War was approaching its
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 0x3b3900ae8552923eb064d3ee0ae367072396cd1d0713c8a7f70ecbb227b46469. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b760e51-be50-4b08-8603-e8b7495353a2.json and https://artists.proofprofile.net/proofs/artist/0b760e51-be50-4b08-8603-e8b7495353a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).