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 0xc93fb3e16710ab368e860d49554a1f509062e92121ee93d590766d8ed96977b0. 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/b60c0229-5795-46cf-9bf2-19681278c286.json and https://artists.proofprofile.net/proofs/artist/b60c0229-5795-46cf-9bf2-19681278c286.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 0x3d1174250528f50a746b59b563bf1b112531687eebdcc9a40c080db14535ecef. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/JPV431800599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2719482fc53668669e59ae4d43b4b47a1c8956a17d68327a0340626dbaba3b21. 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/JPZ921612672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6e36a6b4a5b5881c2d3f5cb2880cc390b45b55e163985c587ea520987a4784. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPZ921612673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59038f452d055b910f4aea0f9b05ed603ffd2b1b87fb3ec0af1f1233b4f52a5e. 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/JPZ921507226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f577a7d0ac09f9258e8a6062ca32b62e423132b600798db64f8580f5bf0bf62. 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/JPZ921507227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a4b2a876538c7b6949de2f338861fdfb0f153548d52b65243cdd1bc7d8e288. 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/JPZ921507228.
TVアニメ「一週間フレンズ。」オープニングテーマ「虹のかけら」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05c123d0ba5bc395da739fa8b455f40a58a4c0cef89405a100498776082f161. 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/JPZ921404281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3544e2cc6b94d7febbd259bb7f5b126d3d0ada6141e3f2f1402b189e132e1d8. 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/JPZ921404282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86863eeaad4e6a657985132f6e4cbcc80eb36805fd09080102826246932590bf. 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/JPZ921308617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd655a7f1f8abfa9fc5c6e597552753f661df64a27f2a589cc1378d86f169e049. 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/JPZ921308618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a505d5e1b7fc2253785aa5cce329766f5f9bdef814e267bda97814ab68d7114. 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/JPZ921308619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a0616c5ff964d10659218fd8155384b2eecde34c743585d8afd9bb4d0de671. 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/JPZ921303142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f65b220d2ecee2ccbc77800326ed10b2c3f628d58bc82c50e89732bd88dd2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPZ921303143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c94cf6dc65d3a2dfddd443212e07b7cf2f2a620cf93e107945ac12950b0202. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/JPZ921303144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3cfd8ecd25712bad792b128dc9c26cf87cbbe8e808b7de3b0f02bfa413c998. 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/JPZ921303145.
銀河機攻隊マジェスティックプリンス CD-BOX
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a0616c5ff964d10659218fd8155384b2eecde34c743585d8afd9bb4d0de671. 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/JPZ921303142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3b9c1c05e91c88e94fb10f44e4901b45373d5905f807b806d94c28374c917b. 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/JPZ921303179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e421b48af19deebcd2df0f72c41e4892bcedc80395ad2bc82e40fe3d99423dc. 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/JPZ921303180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86863eeaad4e6a657985132f6e4cbcc80eb36805fd09080102826246932590bf. 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/JPZ921308617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd655a7f1f8abfa9fc5c6e597552753f661df64a27f2a589cc1378d86f169e049. 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/JPZ921308618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e842695847c6cde2c40b2b527c8fc90c766a68a007a8a21dfff2aade485b9c0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPZ921315188.
一週間フレンズ。 オリジナルサウンドトラック
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96e1080a4bc1dcf2a6941c8b2f7ee0109fafd525fd485dffc3cd917ff55e7ba. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPZ921410286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44491fb50c7a2693a4daabf2f06255cf3248276da1c616c09ecc94eb9e21519e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPZ921410287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb10c88e43c260c8d149a18d3e06fb74512af86acc6037c58d842ad87c0329e. 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/JPZ921410288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5d3f73ff737a2b377cf5372198218b4d42996112c1196c28ed4f47f6bfe139. 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/JPZ921410290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685241a0842f796b59d09c98b7050d9e7a6a3c8f698a418f2dca3b85b2830570. 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/JPZ921410296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f36838b05657262c8059692390095dd2470ca6137377a32951290beb6d6ac5f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPZ921410303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bc7a764c4bc6d84ba89e6654e6add5269d38e42c403a6dd7f0f529ddfbdae6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPZ921410304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eb84bfb23ddb5c7de33bbefbea9ef43cda6939d4b495ebac2d8aa935cdad3e. 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/JPZ921410309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5726cdea647bdcd9a7baadfdf2ae130744b49771c55db292f2bcb989e0fc6f. 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/JPZ921410311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc507619063773356c7c3f7f8c93c953911f36277bc69fb906a7d3f809a075c0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPZ921410314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4791ec2ddd870d9cfa2ab1433eac0abf121521f8ba8e00f24270a312e869fe63. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/JPZ921410315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b9315f4e57c6ad6753c5338630ec5981f4c7e2ead967675109998892d9ed8b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/JPZ921410317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26f4f6b749fdef2003e9e5e246d2563e6a042416adec396dc996f0bfc8806d0. 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/JPZ921410316.