Southside or South Side may refer to: Places Australia Southside, Queensland, a semi-rural locality in the Gympie Region Canada South Side, Newfoundland and Labrador, a community in the St. Geor
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 0xea3d2a1eb6abc4d3a59852913831683f313dd5e1196bb2f6354347fac09ca3db. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccbb4fe3-395e-40dc-9587-22e25ad89070.json and https://artists.proofprofile.net/proofs/artist/ccbb4fe3-395e-40dc-9587-22e25ad89070.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).