The tilde (, also ) is a grapheme or with a number of uses. The name of the character came into English from Spanish , which, in turn, came from the Latin , meaning 'title' or 'superscription'. Its
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 0x0852f8f65ca87344c000068ab583778b8af3cdd97e2c4c44734b9542642638ab. 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/74d02145-4365-4b3e-b87e-063a88924cf5.json and https://artists.proofprofile.net/proofs/artist/74d02145-4365-4b3e-b87e-063a88924cf5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).