Jarrow ( or ) is a town in South Tyneside in the county of Tyne and Wear, England. Historically in County Durham, it is on the south bank of the River Tyne, about from the east coast. It is home to t
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 0x93adea198e4bc10d74c5ec291c0fae8a3bf71c04f6fa856c51db086028fdcea7. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6610bf70-f4dc-41e6-a0f8-4c863bb0920e.json and https://artists.proofprofile.net/proofs/artist/6610bf70-f4dc-41e6-a0f8-4c863bb0920e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).