Martes y Trece were a trio (and later, duo) of Spanish comedians whose members were Josema Yuste, Millán Salcedo and Fernando Conde. Their style was characterized by grotesque gags on everyday life an
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 0xa7e76b23a05f9e4e6399b464af1166cfaafd6218e715775e853a8e83ff0bcbc5. 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/81ad39b3-966a-414e-ab39-60529e1840a4.json and https://artists.proofprofile.net/proofs/artist/81ad39b3-966a-414e-ab39-60529e1840a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).