Sobel is a surname. Notable people with the surname include: Adam Sobel (born 1967), American climatologist Alex Sobel (born 1975), British politician Alex Sobel (basketball) (born 2000), American b
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 0x7fc488bbd2c48682e49c68bf56c766c91fb7a38326fbd457152f36e65a9c2cb5. 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/8f695956-4611-4732-818b-f577f3187f6a.json and https://artists.proofprofile.net/proofs/artist/8f695956-4611-4732-818b-f577f3187f6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).