Tash, or TASH may refer to: People Shortened form of Natasha Tash Aw (born 1971), Malaysian writer Tash Sultana, Australian singer-songwriter and musician Tash (rapper), a solo artist and former
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 0xd8cc66b39d7534cea0a26de17bd9b4c94ba20e74b297350fc96f4c59d2ed593d. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c41278e-27ff-42a6-9813-c2f68905bf24.json and https://artists.proofprofile.net/proofs/artist/1c41278e-27ff-42a6-9813-c2f68905bf24.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).