Tn or TN may refer to: Businesses and organizations Air Tahiti Nui (IATA airline designation "TN" since 1998), a French Polynesian airline Texas and Northern Railway, an American railway (reporti
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 0x294e201e5346f2134483addf46e8e1a8390d66d942b3c23bda1ecfcae4b00ac9. 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/b32352e4-3a54-4c9c-9c6b-7aa48066b38c.json and https://artists.proofprofile.net/proofs/artist/b32352e4-3a54-4c9c-9c6b-7aa48066b38c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).