Null may refer to: Science, technology, and mathematics Astronomy Nuller, an optical tool using interferometry to block certain sources of light Computing Null (SQL) (or NULL), a special marker and
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61660f53f5edc8083b3de2e6686a1f9a0749d810242eea429ef09a3097014ee. 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/8f568f81-cc9b-4b36-b27b-af7c4e62eec8.json and https://artists.proofprofile.net/proofs/artist/8f568f81-cc9b-4b36-b27b-af7c4e62eec8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).