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 0xda93dfccacab976d7f760324165e846cd05b4eacf1393cb51e399b0e8d45cbb9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61125e9d-e64a-45b8-9b5e-9437ff68b48c.json and https://artists.proofprofile.net/proofs/artist/61125e9d-e64a-45b8-9b5e-9437ff68b48c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
美味しいコーヒーといっしょにジャズを
素敵な時間を過ごすリラックスジャズ
リラックスタイムに最適なジャズBGM
おうちでのんびりと気持ちいい時間を過ごすジャズBGM
さらに集中力を高めるジャズ音楽
春風を感じながらのカフェタイム
Cafe Bossa Nova to Listen to in a Hotel Cafe
Music to Boost Concentration in a Refreshing Spring
春のサクサクスタディチューンズ
Study Jazz with the Feel of a Spring Breeze
雨とジャズのサウンドでリラックスして勉強
Refreshing Jazz BGM Enhancing Work Efficiency on Rainy Days
あたたかなカフェでゆったりと聴くジャズ
Relaxing Music for Improved Work Efficiency on Rainy Days
真夏の夜のリラックスカフェミュージック
夏を感じながらの夜カフェタイム
Cafe Jazz for Listening on a Midsummer Night
夏の夜カフェジャズ 〜ほっこり時間
あたたかな雰囲気のカフェで聴きたいジャズBGM
Autumn Breeze And Moonlight - Good Night Sound
おしゃれなカフェでほっこりする音楽
Comfortable Autumn Night: Jazz for Sound Sleep
秋の夜長の夜曲〜ジャズでおやすみなさい
Soft Autumn Night - Healing Goodnight with Jazz
BGM To Listen To When You Want To Concentrate At Work
Refresh Jazz for Concentration Improvement Feeling the Spring Air
Work Time Speeding Up with Fresh Spring Bossa
Background Music for Concentrating on Study
ゆったり自宅で仕事をするときのBGM
勉強の集中を助ける雨の日のジャズBGM
Jazz Background Music for Productive Work on Rainy Days