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 0xffb97a7ee36efeed142cc638a2c7ab5f2c40c9dabe51143c18ac5dba178cfa97. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09ef42e9-1680-41f7-8793-4d7f7c0511f6.json and https://artists.proofprofile.net/proofs/artist/09ef42e9-1680-41f7-8793-4d7f7c0511f6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33899496b559f06932b1f039244fdf15d623cef114ad7683586e55733ea9117. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCJPT2220165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9276aded434089c9ae066e5bacc7ca630004a89e3d4754c7abfe13f2603160. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPT2249298.
なんで牛乳はペットボトルに入ってない？
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa555d87f461c1f99b8d76545949d13d281dad4b8eeefcf0c10d7fdbaabea2edd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPX2327017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafb405dcc2b5f580fbdfa87f45a085178a6701711abddfe70e69c7e47ddd469. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TCJPX2331740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c18f52bd1f28b4809f644dc67ca7f23ec4c793a94ff3754b04ec101da100af. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCJPX2357153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7a0b493215e3ae82c875d7e0f59f9027f08cdff157bce144ed0e9bbeac4574. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T22:00:14Z), 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/TCJPZ2436640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e75da2f890b80dd3aab41a254d0e8150af6b65f245ec628d20f4a365f13121a. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCJPA2499264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6bdb6ae499d054ffe7f0596fd5ac7ecbb6341e016862b236c7816ed3d80586. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T22:00:07Z), 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/TCJPD2595505.