Spanish guitar may refer to: Classical guitar, a six-stringed guitar with nylon strings Flamenco guitar, similar to a classical guitar but commonly found in Spain and Latin America "Spanish Guita
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 0x7dfafbb3df1d62efc5531680e808b864c010e6996c73ce2cbcdd4e8820b2dbd6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3092e45b-a4c1-44a4-b2ac-e19555f893b5.json and https://artists.proofprofile.net/proofs/artist/3092e45b-a4c1-44a4-b2ac-e19555f893b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).