thumb|alt=main( ) { printf("hello, world") }|Simple C source code for a "Hello world" program. Taken from the seminal book The C Programming Language, it originates from Brian Kernighan in the Bell
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 0x738f0d409bfb732e60b4123e8af6c97f36af818c14da43e36ad409b85dd87e40. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a3173ad-d64b-4541-a908-f121edce6a2d.json and https://artists.proofprofile.net/proofs/artist/0a3173ad-d64b-4541-a908-f121edce6a2d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).