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 0x671249721f6cdbcacd1b10008a4c0a9ab452223c295a7b1fa6c481e5fda0427c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/137d31ff-d44c-4fe4-b8b8-80f995d0d40b.json and https://artists.proofprofile.net/proofs/artist/137d31ff-d44c-4fe4-b8b8-80f995d0d40b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x34e14cd1427dc1ebb56092962fb707c4dc02d9d20ec96d5b428c4aefd59f59bc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:03:51Z), 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/JPCO08320270.
渋谷ものがたり〜歌手生活１５周年記念〜
かりそめのラブ・ソング / 北の岬にて
チェリオ！ / 不思議なワンモアチャンス
歌手生活20周年記念 新沼謙治／わがまま
流浪人（さすらいびと） / 時の命ずるままに
愛妻 北挽歌 / 新沼謙治 〜ふるさとを歌う〜
ひゅう・ひゅう・ひゅう〜風に笑われて〜／一人…南へ
飛行機雲 / 左官職人 こね太郎 / 左官職人 こね太郎（音頭篇）
新沼謙治全曲集 左官職人こね太郎
定番 歌カラ ベスト 3 新沼謙治 嫁にこないか / 津軽恋女 / ヘッドライト
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03829d9484938c5f430121185878bcc97c403d1e27cf17b3d8ba55e1527023c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:33:28Z), 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/JPCO07709920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0117c2342e06fd7347c5aad63c3c627e456dd2a0f45b482d0814450210dbd37. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPCO00902320.
新沼謙治 魅惑のベスト・アルバム
(昭和アーカイブス) 野の花のようなきみへ
(昭和アーカイブス) 地図のない青春 新沼謙治 III
(昭和アーカイブス) 熱叫 一九七七年 夏 新沼謙治みちのく帰行
(昭和アーカイブス) 望郷詩集 新沼謙治 II
新沼謙治全曲集 ふるさとは今もかわらず
ふるさとは今もかわらず - シンフォニック Ver.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6790889de3e4910293a8242817b02bec2fd6e6b6f4862ed1c67218ea9205a4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPCO01312220.
新沼謙治デビュー40周年記念アルバム 気持ちよく悲しい歌が聴こえる
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d93f141639ff94e2693107ce13d771d6da1e905cd69f4360f91ba3097c21e05. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPCO08715880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d0228973ebc6e73fbf18f50de9cf82dd28e4e927dae0ce71a5e4a682e0d376. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPCO01405580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf810aae9380d3978262df50f4ac4f749731ad03421d2709cc20cd209b36636. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/JPCO07814580.
新沼謙治 ダブル・ベスト☆オリジナル & カバーズ
新沼謙治全曲集 まぼろしのキラク
スーパー・カップリング・シリーズ ヘッドライト / 津軽恋女
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9c3ac59dc45b794a864870a662046f7dcf57ed3374db8b72f6ec9c141cc860. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:01:11Z), 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/JPCO07700910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab72a592bbced87dcd25abf71aab815bfd378ce2e8f421f89896f07a7cdcfcc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPCO07610660.
俺の昭和が遠くなる - シングルバージョン
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c1af06695bf3a485d1ad44352f57540553cc0be1704ef86e4941eae490757. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPCO01601050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5c5162d74517a6fa5393eaaff7b88d7fb2034a0fc97f0b6296cae701b68761. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/JPCO07611280.
新沼謙治全曲集 もう君はいないのか
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22849d0904075e58375968c68cba7ced51b40cc9f75497477975eda4c747e287. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPCO02504110.
We Love Katamari Original Soundtrack -Katamari wa Damacy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff07585b3c4cfb0ce80e080827ffdcabf5c28ef68ddf82838d9667ee67881529. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPCO00521930.