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 0x7184fabfcb205fcbf90318990a48d9380300f35b384b1a6daa9bf2485a2bd44f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/400cd157-5913-4afa-a640-a31a3afa4bb6.json and https://artists.proofprofile.net/proofs/artist/400cd157-5913-4afa-a640-a31a3afa4bb6.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 0xef4afa7bfeefa68298be8f81627c93a80fbec8bc79df01800c9fe44e62ff8b7f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA41931814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adacd80114d1eee75c037a66b5be85d3528edfb10a440b96b3df98c83aa7526. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:27:35Z), 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/QZK6Q1923631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf904eb2bf1b049c0605dc04739bb321946ce2c81c9fb0a3b877c0150b238648d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6Q1923632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1976412bb93b035a4c0ea6f2b71bb95b58bf4533ab4050ee03a3925ea801c7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6Q1923633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe057770a8fba51270b0068eba3f1e6de1069ca1daa6801890db63ac8e8d83ff0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6Q1923634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa7c25683469d27d98234dfd38b053cb03b748aabdc4cda703ca6912f0b502e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6Q1923635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d8c14716f11f0d70e2941db4bec72542025248e429cd8c3c93674c1b621c0d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6Q1923636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb29b6bd94898475401fffe596b8997a935bc794c8e63266fb60963b752235d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZFZ22013684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb51b5cee09552541a384b5741b5c7cd926771e59aaebe2508d1192b66442992. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:33:38Z), 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/QZK6Q2026080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d79c710891a72fcd8be39232a98b39aed3253011ea0935cb41e07504febe06. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6J2132979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1ee182b1697722fa31707de584156e23be0e415866638d285a30821cce0f3a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6P2208382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e6b07a5992d6af8e4bc4ab874e3560db5c243d11b7c7a54cb14f6fe0337074. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6P2208385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06fa812ecf0d63bfbd0e44a86d0c43c9948b3a2ee17ba9f065acfd8e514c0eb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6P2208387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f260c7a4039067f83d52289066e49fd28a765cb8a2288cca9a4b6ef596b85ec. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZPLS2288563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d80bcbc25be41bf674753d5b2d6c957093e8e83458d41b8a7dca7d020ca3c9. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:05:35Z), 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/QZPLS2288567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249beb8acf31e0d4aa25bf2c5b3a44f6bb62cd3adbda36f19bbaf80d066c4155. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZPLS2288569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb589f0c5378b3b75f2ab478420046382b1a1487b65a90c488607dee20ebeefd. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZPLS2288570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc66682c05df7762728f9d97a1f113d01e6e5cfbc6f88f79239f1a1a7f64ea7b. 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/SE6SA2129726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1a8f273a955281dea29a445db0a7b6b8752cea3b703007d85e3ce4e4b93284. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWZ2052554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ec55a31b47d9ef468ecdced5f406f433c8d2c5bd049fe1f50cd26946e45d91. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYW1975284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bd19ace0635cab77b284d7aa2d2a06474a9f863768593cdece603d7f1e3ee4. 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/QZDA62351363.