Tenza () is a town and municipality in the subregion of the Eastern Boyacá Province of the Colombian department Boyacá. Tenza borders La Capilla and Pachavita in the north, in the east the department
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56198ddbece8cb75c38554912c80ab408ee792f62cba0e9d42f9d9173492bc47. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a13fde6-d98b-49da-8b31-ccc5ab6b8139.json and https://artists.proofprofile.net/proofs/artist/4a13fde6-d98b-49da-8b31-ccc5ab6b8139.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).