(; ; Okinawan pronunciation: ), also , is a martial art developed in the Ryukyu Kingdom. It developed from the indigenous Ryukyuan martial arts (called , "hand"; tī in Okinawan) under the influence o
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 0x667764f97d0ea3ab982eb50f964bfbd7fccc5026e6aa191051b45673bc3817c0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e06b2570-a045-42b1-a1ff-7a7ee34d15f9.json and https://artists.proofprofile.net/proofs/artist/e06b2570-a045-42b1-a1ff-7a7ee34d15f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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