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 0xc7e14ffa66ebd6a59831cd022f8d991270833e1299356f6f61098309fe3cbf87. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92cbc7b7-0d95-4473-80f7-47bfe4cfb3a9.json and https://artists.proofprofile.net/proofs/artist/92cbc7b7-0d95-4473-80f7-47bfe4cfb3a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
切ないピアノ音楽: 涙活で聞く美しく悲しいピアノ・ノスタルジックな雰囲気を作る感動的なピアノ
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 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 0xf551abaa89b7f63e2fe00414eba69de3f917579a3f1a190e123b5f34c12183bc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ITO102024716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624a0ac0699117e429f532716b9a615702d78d96b97fa3d6fb91c354d6ead92e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ITO102024717.
泣けるピアノ: 涙活ＢＧＭ, 泣きたい時に聴く切ないピアノ音楽, 泣いてストレス発散
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e54d3f777931d67133bb349e45d2157a766e386eae5ea08f8371e3ccce4d70d. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/ITO102049464.
泣きたくなるピアノ音楽: 哀愁あるＢＧＭ, 悲しい時のリラックス音楽
美しく切ないピアノ: 泣けるピアノ音楽, 心に染るメロディー
哀しいピアノ音楽 - 泣きたい人の音楽, 感傷的なクラシックピアノ
切ないピアノ音楽：ノスタルジック失恋雰囲気・涙出る心包み込む