Zurdok was a Mexican rock band based in Monterrey. It was formed in 1993 under the name Zurdok Movimento, changing it several years later to simply Zurdok. It was one of the most important bands in th
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 0x60f836970564077a5f1de7e614f3920399463f4a02a2c5dcd78b79c03c34d897. 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/75aa46b9-df68-4b0b-8d17-5b4e7bf0324c.json and https://artists.proofprofile.net/proofs/artist/75aa46b9-df68-4b0b-8d17-5b4e7bf0324c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).