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 0xbd55ef56b5663085248731607be549137a1a58fdcfcd4bc7cd25ab6df1cc4e98. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/062407b8-3fb3-40e4-a118-36fe42a1a178.json and https://artists.proofprofile.net/proofs/artist/062407b8-3fb3-40e4-a118-36fe42a1a178.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
さえずり野鳥図鑑 リラックス自然音 ～鳴き声を癒しのBGMに～（野鳥レコーズ）
アカショウビン - 野鳥のさえずり・癒しの自然音（Wild Bird Japan feat. Field Recording Lab）
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 0x015c0138628b7607493891cc82f60d7ab0b6ad888c8dd0bbfdd2662eb0bdc289. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921906555 — a six-check JSON result.
アカハラ - 野鳥のさえずり・癒しの自然音（Wild Bird Japan feat. Field Recording Lab）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee42fb8b69b5420785cbdd8c41ba1bc5a326bda7bcb00597d116a057b3fdc70. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921906556 — a six-check JSON result.
イカル - 野鳥のさえずり・癒しの自然音（Wild Bird Japan feat. Field Recording Lab）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871d82e6e6a6c713ffd42a15d1dadfbaccaaafbebdb983bcbed544f1f68d85f7. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921906557 — a six-check JSON result.
ウグイス （日本三鳴鳥） - 野鳥のさえずり・癒しの自然音（Wild Bird Japan feat. Field Recording Lab）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556eeba049d0bb84779d1849c011f7ad5e425b05ee33c0bfcfbddb217b054a11. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921906558 — a six-check JSON result.
オオムシクイ - 野鳥のさえずり・癒しの自然音（Wild Bird Japan feat. Field Recording Lab）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabec4e48701a2ba3676488a054243e9eef2af85fdd4cab6bc8ab504787f637eb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921906560 — a six-check JSON result.
オオルリ （日本三鳴鳥） - 野鳥のさえずり・癒しの自然音（Wild Bird Japan feat. Field Recording Lab）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5689b5419988eb8a27c367c37cc0fd0fcf0b212062a9a294987c6cdb819362. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921906561 — a six-check JSON result.
カッコウ - 野鳥のさえずり・癒しの自然音（Wild Bird Japan feat. Field Recording Lab）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0276e7fc1f310102d6bada2d4c7c832d8fe9c955ef727e245df5d918182fb74. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921906562 — a six-check JSON result.
キビタキ - 野鳥のさえずり・癒しの自然音（Wild Bird Japan feat. Field Recording Lab）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efcd8303dfcbadf0c2b7afecbf6942cb193305270032906ffa21aa322b870dd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921906564 — a six-check JSON result.
コマドリ （日本三鳴鳥） - 野鳥のさえずり・癒しの自然音（Wild Bird Japan feat. Field Recording Lab）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa318d5f8e4f713ea362851286e2ae4f7de5dc7a57332834d4492f6611b29886. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921906566 — a six-check JSON result.
ヤマガラ （incl. オーストンヤマガラ／アマミヤマガラ） - 野鳥のさえずり・癒しの自然音（Wild Bird Japan feat. Field Recording Lab）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008ac652de835a01e28bd1a6722d97381926db357763d6872debfe4e957f3154. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921906575 — a six-check JSON result.
フクロウ 眠れる森の鳴き声 - 自然音×睡眠
リュウキュウコノハズク 鳴き交わし
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3006b60334bf32bc14180d345f52dea0aa22016c3e9bb3ed502f68f047d5ed. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ922205901 — a six-check JSON result.
リュウキュウコノハズク オスとメスの鳴き声
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2ab2e0585cccebd41625773607659ab20580ccf7d0fc9eeeb9b5811cd87c60. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ922205902 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b1baffe33247581b1a182d341b1a876075514cd3eb161a961fb1461b36f984. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ922205903 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7698b0daeead0ef669ec98ed6d2c7840628bf4eb699ae4a3fd176fe8beabee70. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ922205904 — a six-check JSON result.