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 0xfaf7d109dc592de134a8f26ca0e67d78a9661501e26a53976e991c749da29ed0. 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/a71a0290-ac8f-4fe9-944a-378b11ac20c3.json and https://artists.proofprofile.net/proofs/artist/a71a0290-ac8f-4fe9-944a-378b11ac20c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Akiba Maid War Opening Theme Meido Daikaiten / Ending Theme Meido No Komoriuta (TV Size)
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 0xdc31291a39ba4c5fdcdf47b6ff52941019c769648524978dfee9f244e1480264. 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/JPZ922210278.
TVアニメ「アキバ冥途戦争」 OPテーマ「メイド大回転」／EDテーマ「冥途の子守唄」 (TV Size)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc31291a39ba4c5fdcdf47b6ff52941019c769648524978dfee9f244e1480264. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPZ922210278.
Akiba Maid War Opening Theme Meido Daikaiten / Ending Theme Meido No Komoriuta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91138d90d7fbccf5d17347bfd921af88894bad7d963ec88f6f5a456af6edae7b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPZ922209779.
TVアニメ「アキバ冥途戦争」 OPテーマ「メイド大回転」／EDテーマ「冥途の子守唄」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91138d90d7fbccf5d17347bfd921af88894bad7d963ec88f6f5a456af6edae7b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JPZ922209779.