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 0x3c8f79a1e4625890d246e302ec95f7b86e8c504bf2e366fae7ecebd3730f69d7. 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/b19b656c-f463-4cc7-822d-2b083aabb557.json and https://artists.proofprofile.net/proofs/artist/b19b656c-f463-4cc7-822d-2b083aabb557.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
夏休みの宿題集中音楽: 水の音で涼しさ感じる勉強集中ＢＧＭ
勉強用雨の音: 長時間集中雨の音, マスキング自然音, アンビエント勉強ＢＧＭ
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d8666c681f8d5c3d96f50cc4b042a7c48bd3a50765355a3e3d0716b2cbc919. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO102054620.
春の勉強ＢＧＭ: 仕事や勉強がはかどる絶対集中自然音
勉強用波の音: 脳を活発にする自然音, 冷感効果で集中する勉強BGM