is the Japanese name for the barn swallow. Tsubame may also refer to: Tsubame, Niigata, a city in Japan Tsubame (train), the name of a Japanese train service Tsubame Ozuno, a character in the ani
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 0xeb0cc2a7c8c92245a6dcdbb7604f83d3798892311137a3a785ced46cb52a66a2. 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/c12c319e-b14d-476e-a4db-5750066300cd.json and https://artists.proofprofile.net/proofs/artist/c12c319e-b14d-476e-a4db-5750066300cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).