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 0x5ef464038bbbe2ee64dc46e5b826e7aa9917f2312a62ce280a380f820a2115e8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd3008bf-3a54-4e4e-a54f-d42b879e76c0.json and https://artists.proofprofile.net/proofs/artist/bd3008bf-3a54-4e4e-a54f-d42b879e76c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
真島俊夫： 三つのジャポニスム I. 鶴が舞う
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 0xcdbaca66579be42e29c0ec765fb585c2891b1d6317a603a3ee3fef5487ab13f1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPH291464003.
真島俊夫： 三つのジャポニスム III. 祭り
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e2bc5c2227d0b9a7692d24856954723e72d2c88bef823089ea90be7d405276. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPH291464005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fed0930ece9f478ec43397df25e551a20dac83838aeebdbf0ac62677f778fc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPPO00419250.
ニュー・サウンズ・イン・ブラス 2015
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3627872921a3f4bf31c16e88591270209e7deca3f8a9cf2b30702c544977e82. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO01507173.
愛知工業大学名電高等学校吹奏楽部
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7937b197d753f152806ea90e1e83674dc90d2173f9b18c9e93494b62104c438. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPU901801662.
BIRDS-アルト・サクソフォンと吹奏楽のための協奏曲 第1楽章
ヴィルトゥオーゾ・コンチェルト
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99a0d79be18bcaa2639e9e2190a14a8dfa5a2842d2fcac972921dad0405ef43. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPB600921606.
BIRDS-アルト・サクソフォンと吹奏楽のための協奏曲 第2楽章
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba3bb9a8915aa84cb79d801b1b14eefa94f9f1703ae83c65618bc009b48e81e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPB600921607.
真島俊夫： 三つのジャポニスム II. 雪の川
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d00572fe1ca8b9b7712881c029f6cf108e6470acb0c46cbd6780b6584a43149. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPH291464004.
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
二つの夢 ユーフォニアム・カプリチオーソ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7af381c1ba73da1f843fdb9ac41c6d246e286bae836a1821f8a50302049c338. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPG201821559.
東京シンフォニック・ウィンド・オーケストラ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27166372235731a4ba3990683e090cc2e251153004dfdbbe7f32ca684030c21e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPTO00000898.
BIRDS-アルト・サクソフォンと吹奏楽のための協奏曲 第3楽章
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23ca7efc069455f9ee9a322ba2231545cac4f1cfe400bed3093db2ce3c18152. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPB600921608.