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 0x61344621662be173e09a8e08a4961689f169dfda4af28e5c2786a6d87f0d477f. 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/2c17fa07-b9a9-47a6-bc3b-43bedfb0723e.json and https://artists.proofprofile.net/proofs/artist/2c17fa07-b9a9-47a6-bc3b-43bedfb0723e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
TVアニメ『この素晴らしい世界に祝福を!』エンディング・テーマ 「ちいさな冒険者 (TV-size)」
TVアニメ『この素晴らしい世界に祝福を!』エンディング・テーマ 「ちいさな冒険者」
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 0x71521cfe596546f266fef401371b1c919b969dea471e5a3dfb98076b647b1fdc. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCO01542452.
TVアニメ『この素晴らしい世界に祝福を! 2』エンディング・テーマ 「おうちに帰りたい」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d4ad895ccdc2521e546871c144172289593b3b33ede4324c65bce397f42ac9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/JPCO01640951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac346895d3e3b91c3100b026a6c7b0d996ab5d036580ca62a7142772dfd4f3a0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/JPCO01640952.
『映画 この素晴らしい世界に祝福を! 紅伝説』エンディング・テーマ 「マイ・ホーム・タウン」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946a9bee18bfde38bac6bf1b8af8c080e0ff3d4787d3a81202619e3e42f8ba44. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPCO02018560.
あの日のままのぼくら (TVアニメ『この素晴らしい世界に祝福を！3』エンディング・テーマ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea75840b35b55e629d5a1b560b4b6c32581b83369ebcc18ebc8e5158aa50ae10. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCO02340930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ec6ad92b0a3840b48f9586fc21cf6942cca6ec7673744c77443cd5319f4c8d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPCO02340940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb26b50cf3dabf46c3a33191d9d763844266974f866b43ef3c831ed3a8cb3806. 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/JPCO02340950.