"Sigma Boy" () is a song by Russian bloggers and singers Betsy and Maria Iankovskaia, released as a single by the record label on 4 October 2024. It became viral on TikTok and charted on Spotify, You
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 0x3f4c8e332b3a0620f03ac369a9d52608b2c115f6b2e26def1623ce147ca22448. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/441ad8d0-6fc2-46d0-a869-2e4959d22319.json and https://artists.proofprofile.net/proofs/artist/441ad8d0-6fc2-46d0-a869-2e4959d22319.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).