Lumbier (Irunberri in Basque language) is a village and municipality in the province and autonomous community of Navarre, in the north of Spain, 38 km from the capital of the community, Pamplona. It h
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 0x63dd8c43412ac10d6ed0e04292664f49e9e57f3465b0bf0c958e50db1eafacfe. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ffcf29b-f0c7-40f3-ae3d-37f7fae96553.json and https://artists.proofprofile.net/proofs/artist/8ffcf29b-f0c7-40f3-ae3d-37f7fae96553.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).