Tancredo may refer to: Tancredo Neves (1910–1985), Brazilian statesman Tancredo Pinochet (1879–1957), Chilean intellectual Tom Tancredo (born 1945), American politician See also Don Tancredo, a bu
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 0x92b6945574985493e8cab5683b742c04b9f4ecd0cfaccbdec83ea6da218fd3a2. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d87691e5-2b33-4d45-be26-03ba711e2df1.json and https://artists.proofprofile.net/proofs/artist/d87691e5-2b33-4d45-be26-03ba711e2df1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).