thumb|Construction laborers in Chittagong, Bangladesh. Day labor (or day labour in Commonwealth spelling) is work done where the worker is hired and paid one day at a time, with no promise that more w
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 0x990fbd446e68117dd28cf17e8113a47bcad3fcf0ece4e0e4321cf453ca309f02. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96870a09-985c-44aa-ada0-b09ab601cdd6.json and https://artists.proofprofile.net/proofs/artist/96870a09-985c-44aa-ada0-b09ab601cdd6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).