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 0xf6c9cb6e2064361619b9441b14a67d1be688be81d144ba865a7ac9afd2a1b3c0. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e54feb7e-cf67-4d6b-868d-b1357f8cbea8.json and https://artists.proofprofile.net/proofs/artist/e54feb7e-cf67-4d6b-868d-b1357f8cbea8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
涼宮ハルヒの憂鬱 キャラクターソング (Vol.2 長門有希)
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 0x35303f85df1abeaa22e2d309a30658c8b1323bed8cd49daee7c1f695793db01d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:31:28Z), 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/JPI100601239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964f9ccad8aa35cd8edf504c959992a58937e158f305bed400ccc2f94a1ed1ec. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPI100601240.
涼宮ハルヒの憂鬱 新キャラクターソング (Vol.2 長門有希)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfdb6398a2dddd047974969dad42f71ce85a16fb0b33c8fca113ed9317114d7. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/JPI100901923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9932299006a3f807f089c64e900a857b74b87b5c39153d456025233ec1e70. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:45:25Z), 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/JPI100901924.
TVアニメ『長門有希ちゃんの消失』Character Song Series ”in Love” (case.1 Nagato Yuki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358fc004a4dd3e424d0a4b81228edf5561840e2dc8c05e6be62ef72e6d4b9592. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:28:20Z), 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/JPI101500674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8187d327cd93af157da08f690a911a48792aed41e02990d439315d7595bc1682. 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/JPI100901032.