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 0x8f1dc9699166c4033dbb27690fbf30e1ba5b9be56f7cfb2ff358889c0f60fb4c. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f43d21a9-c781-49fe-a098-13209a2454a3.json and https://artists.proofprofile.net/proofs/artist/f43d21a9-c781-49fe-a098-13209a2454a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
虫の鳴き声 ・ リラックス効果、ヒーリング効果あり
ウグイスの鳴き声 ・ 春の自然の音
森の中の自然音: 川のせせらぎと鳥のさえずり, リラックスＢＧＭ
虫の音: 森林浴ヒーリングＢＧＭ, 鳥と虫の鳴き声, 作業用リラックス
虫と自然: 睡眠導入自然音, コオロギの音, リラクゼーション秋の風情環境音
安らぎの虫の自然音 - 自然ヒーリング, 秋の森の環境音
自然のさえずり：森林の癒し水音虫の鳴き声サウンド・ストレス浄化深呼吸リフレッシュ