The Celtic Warriors () were a rugby union team from Wales, who played in the 2003–04 Celtic League and the 2003–04 Heineken Cup following the introduction of regional rugby union teams in Wales. They
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 0xf855a370fc2d20fb0205b0471e2f3d3c141b37a01ad509d0087e9d76a9a2559b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ae8aa98-fa8b-4ee7-ae85-1731b7c28979.json and https://artists.proofprofile.net/proofs/artist/5ae8aa98-fa8b-4ee7-ae85-1731b7c28979.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).