thumb|Examples of omens from the Nuremberg Chronicle (1493): natural phenomena and unnatural births. thumb|Manuscript of the mid-nineteenth century, possibly of Sgaw Karen origin, shows various appear
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 0xd0dd5a349e2d52a323976bab041385f17e2dd036f7fe609cf0700d73e6f19687. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9dcc1c2-8892-42c1-9a88-af8fab76ba34.json and https://artists.proofprofile.net/proofs/artist/e9dcc1c2-8892-42c1-9a88-af8fab76ba34.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).