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 0x94fc5d9622b7216146fe440a1dcaee23ee6237bfb1ec71a06dd71dabc8110f51. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff50d891-a4af-4037-a82a-6d3cf08cd084.json and https://artists.proofprofile.net/proofs/artist/ff50d891-a4af-4037-a82a-6d3cf08cd084.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x1ea2f615198a94836dbb07c87c37168a6ff73d80cf8f65904f77ef7389e5979b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM6N22262402.
画ニメ『赤色エレジー』/遠国トピックス模型映画『りんご宣傅隊南へ行く』/映画『闇を掘る』
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd978977b9103e3589f7c3e3e613967cd578a9b37a008708c05b2a805bccd7273. 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/JPB621500352.
少年洋菓「永遠の遠国」別刷附録 アウスランド・アム・エヴァイト・レイルロード
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25494a2a3d5b93e897f48c12c86902a18b41fa0c9561c468544e02d2a378aa66. 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/JPB621500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2f985870815d04270614c97aebad5c08a6dee1fda1315a9a1a5010161fcd2f. 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/JPB621500275.
俺の知らない内田裕也は 俺の知ってる宇宙の夕焼け
あがた森魚コンサート～『永遠の遠国』at 渋谷ジァン・ジァン (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1ef3542512acf931b128e25164d8c592dcd7fdd29bcc568c609a65dcad6ba4. 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/QM6MZ2231468.
オー・ド・ヴィ（オリジナルサウンドトラック）
佐藤敬子先生はザンコクな人ですけど
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9907d1bf36ff0edf3690cf657ed2ddb7d20c8b7561b4a1d538a735b695d99cb1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/JPKT00108201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f76c1ef36d69c51749199dd4209572626d0e461529a08976322ff66c9768e2. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/JPKT00121801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64081637e11a5c05deb2642ee712034ee744f4edbf6f666a5f83388c8d6824c8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPKT08602201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cdf48ebde63c48fb41cad67ed4321e8fd1ffb73ce4299c29da403ce51bdbf8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPKT08602203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee7dcbe8124b50b517440140f8f36c6025d928aa19bbcdee32585587b40c563. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKT09520201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cdf48ebde63c48fb41cad67ed4321e8fd1ffb73ce4299c29da403ce51bdbf8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPKT08602203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139d0f7d8804f54ffcb5b3defa71913e7818bec393778f8015fbb05f23806151. 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/QMDA62230134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd27d8bcdef1e908bd411bbe3b012f5f3177f05e74b8a3441f697b96a783db92. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA62230135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431d7509b6e512576afd0c9724ef0a96e69b16374484c57607ad5b4191d73454. 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/QMDA62230136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e59fa439c88329765bdd7884dfb67833c211afb00dd378066853a7dd10afc0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA62230137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc1bb5eb6358f89956916acd9587b1210830ceacbbd9666bcd713a3b76bdd50. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMDA62230141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ab942390e07250c8d48becb3333ec9d9d0679ef0569732bd1b045d97c0fb11. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QMDA72408378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6274753a671c9b5f770a4a472b189f9f4889b7f324b1163f1e668dc54f576a2d. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QMDA72408379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2b0a2727f28ea52c55ee88b4d8761b37e833f12ddad332601660f442f1ed3d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA72408380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db2a0a0d1bd465f416e78f184b825caeecde5249ec1f6e2cbe1d7934e463bdb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA72408381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9b8fde5e6cb30829351728fc5c490268f272f1cc47aa076245093b27fad556. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA72408382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91141a0e81705d12d43e354a0bef5f8f1456820e4f3cd735505f4fd6281cba04. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMDA72408384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c8a6ef44c62cb3791ff1c8ff2c298974affd864e8aca3263ede2d614659b41. 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/QMDA72408385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533ef97ec87a3e001fc8219c86181e0e62b2ea4ff3eac48a21993b2036b72472. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QMDA72408387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86280bddc7bb0ff4bea68351bfcc02309899611289eee0abf2c79ac9d02152a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA72408389.