thumb|right|Sago palms (Metroxylon sagu) in New Guinea thumb|Peeling and pounding a segment of sago palm stem to produce an edible starch. Sepik River, Papua New Guinea Sago () is a starch extracted f
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 0xedab449a1a18642e68a49b6b2a99e20f75fed01afb9cfe4c8a95e16c28911371. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/058260df-6b1b-4807-93e8-1dfbc9e70716.json and https://artists.proofprofile.net/proofs/artist/058260df-6b1b-4807-93e8-1dfbc9e70716.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).