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 0x3f32a913bc14f48e051e4802906a1dfebed6a49fe07cd1c2c8714b0a28357041. 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/58ee3771-98fb-460b-98ea-dd3e2ac7f4ff.json and https://artists.proofprofile.net/proofs/artist/58ee3771-98fb-460b-98ea-dd3e2ac7f4ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ダンスたのしくなりました。～子どもも大人もやってみよう!基礎からフォーメーションダンスまで!～
保育まるごと夏ミュージック～梅雨/歯と口の健康週間/時計の日/七夕/音頭
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 0xfdb1ec0b991a220b55bbb15f088f460ad05fded3d5449d191edf7369005b3d74. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/JPKI06941779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2554d3c871b3e096993536f6b36cd45a8834d5a7c369fef0d6fc901f74bdcab6. 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/JPKI09004040.
素読み&歌 流し聞きで覚えられる!九九&英語ほか
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf535ac9af07472c3fc8f80dff226ddc5f2add80ebab78adccd3976bf699d94f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPKI01016095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589eb287e9b3ad1459cb1476e8e45c1407d9ddc7c3e00a9fcfd75cad3dedb035. 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/JPKI01716208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe55cfb3c8fd1d420b26e7cca9a1e84d137598297e3d6c9b33923e8b02855fb. 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/JPKI01017910.
あいうえおのうた～ひらがな覚えうた～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e231d04eab66245eb665ac67575b5ee220cd2df75411977c72dbc2dd1179305. 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/JPKI01412100.
雪の日に聞きたい歌～節句や行事に聞きたい音楽まとめ♪～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6509a197d6d4b414bc3844a72a26f35b23409b98795aa6ad1fafc5511f0b52. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPKI01820243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5680ca0935c0dca550425f86627c7a79aa6a23d8137aad02acb59d97791e24c6. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPKI01419083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5e150cd2b72980b758ddc499a07f8483410409f9ef7e112b92a7f0ada51ebe. 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/JPKI09010840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9140b29fc89585297734c8f9b27a2ef37593851a951634bcabffcfded3b3df. 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/JPKI08898731.
うたって学べるおぼえ歌～「ABC」から「九九」まで!～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119337e9cf3da1c32ebf0afa385ac2358ce8076e73b9b83c111b0ee242904698. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPKI01110904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f4b9bbd4e550f3f5266f1b13c5aeb8cb2638126436ce9d028ed034d6f0c1d1. 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/JPKI01110909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021a03f169804570e7b00d249778526c415a69db63c3a3b916b29670e0a31640. 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/JPKI01110910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa21c5cd25c92b550e87a603cbf328a836bfa5cfaffe8686590e4ebd5a4f819d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPKI01110912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68a7b11e8efe09849a76ebf07108dc83b1d35ec4f57a2250bd010e0a0d24db8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/JPKI00710801.
あいうえおのうた～ひらがな覚えうた～<あかさたな行>
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d68a48998605838e4f6db4cd4fbd60eb8580cd3e99271dd030389c229645cc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPKI01416518.
あいうえおのうた～ひらがな覚えうた～<はまやらわ行>
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c2478940b81a2bcbc271c25b69dcdd6a8b8bd58a97485552ffa40f87f6af63. 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/JPKI01416519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf454bdd91f793c80f2a58db9fdfae593b31b3394e0948f3a94df9a0d7fcd3a27. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/JPKI01410409.
むすんでひらいて(えいご&にほんご)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba129818064a687ca9bc4483c23228d31377cbdd0c6361c84d1a64c96a8b152a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPKI01214911.
～ミュージカルだいすき♪～ 夢とあこがれの ミュージカル・ソング
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36625ef2679f00a410b0f4c69616cf850868ee582341f70b38de8ea754984e09. 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/JPKI02013881.
チキ・チキ・バン・バン～『チキ・チキ・バン・バン』より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03a6300a8beb867d388b3ebc84fccda779a7cc0cf294725f360079bb3e60b36. 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/JPKI01817736.