SG, Sg or sg may refer to: Arts and entertainment Music "SG" (song), a 2021 song by DJ Snake, Ozuna, Lisa, and Megan Thee Stallion Gibson SG, an electric guitar manufactured by Gibson Guitar Corpor
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 0x1507e6e879e880c09f7c1d1b2c3f03b165a93dd6bf41294208cd3b7af484d647. 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/72aefd48-e18c-494b-9da8-481e42e09900.json and https://artists.proofprofile.net/proofs/artist/72aefd48-e18c-494b-9da8-481e42e09900.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).