Sandy may refer to: People and fictional characters Sandy (given name), including a list of people and fictional characters with the given name or nickname Sandy (surname), a list of people Sandy
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 0xcb4580c68b8ef040ab36260da11a1e212067dc689bf34aee9bb2059cfe1bd914. 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/3c0fa823-8ad4-4f06-b0c0-0a4acc5a551c.json and https://artists.proofprofile.net/proofs/artist/3c0fa823-8ad4-4f06-b0c0-0a4acc5a551c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).