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 0x2932675ce8d6b6bc43739a84717999815c10e05f37eae441472f6b9aaab714c3. 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/2205a6d0-a170-4db3-b082-9050d752ed9b.json and https://artists.proofprofile.net/proofs/artist/2205a6d0-a170-4db3-b082-9050d752ed9b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
モンスターハンターライズ:サンブレイク オリジナル・サウンドトラック
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 0x156500bad1c9f108de762c924d6abbc514d687f0ec8d440303c7e42d3d11f128. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPE102202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2973cd59effe237ecc8f2d021e1a013e726e663078740e06aa93d584725cbe. 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/JPE102202030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0084a14b1e50c8c82bddf5ef7423e27f05fafdb6dd2e2d47ac465e2d25f86d34. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPE102202040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaa8fa30c8d753b52679694734fc1125fa19ac8c24b3cfd975dbd22dc0230fc. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/JPE102202080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfc6d13e54dc3e5b579607fea7cf365dc324cc4137591c0881ff534814e354b. 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/JPE102202150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4247537e631f4d1793c892cfc2b4c49bf5ef02f171649c93968fcfb8eb96d21d. 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/JPE102202180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c60a98214d5f42e9e7c0608221e652c17b7788cc5e6850e323fe4a9ba9a54e7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPE102202200.
攻防自在、乱戦必至の城塞：小型モンスター
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96424e832af59dd9c0384891b006ca5ec839c262c7c883442ad32867596d3be7. 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/JPE102202210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f387d580450221914e4873cc0d71eea7cd76b3b24abd252018d34cdee91c94. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPE102202220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aea8a46c4bf1fdc49dbc4c452dc07fbc2743ac5a16c12f249ecb567fb35635d. 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/JPE102202230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f25a05abad619f2171023d6142062b70d0168e1d0e6715da7def3b568e47d5. 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/JPE102202260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c81b90e8c4563d7ab4e870fcd12f1f396e6bdad7c0e33ec237058e86ca03bb6. 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/JPE102202270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c33e82d65678696e849565c7a7cf82d4c381bcc4209f3e23cf14c21f3c85f8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPE102202280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060ecc83c5c8fc3a70b1f8af48c894d6dceb9478b292a5d88c2c8ac25aab06e6. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/JPE102202380.