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 0x1cd60485e19aaf8692da6ccd0a71263324406b049e10ba1241f777a879b0096c. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e4fa8ec-def2-4740-a04f-b3f9f035e238.json and https://artists.proofprofile.net/proofs/artist/1e4fa8ec-def2-4740-a04f-b3f9f035e238.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 0x7a52a35bd88a4a86bd35f8c3964a752195896851d5387fad28baf70b623a18f3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX762330826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebe81af5caa762a09dd719a0938a8f78f406bc7d0154fe048618e76d8a73c21. 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/CNZ792100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17adeb51fd3137c264f2f5af491e2038f73d21da6c7d6fe6523a9ae7a03c352. 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/CNZ792100124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc619bdda563f0454b3a76fbccec6132dbbcbc4f1989f528fe6abe37c1a45d1bd. 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/CNZ792100200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd01b60bb0135ba43ea2015133dc12290019236e06e72a8686e30652d831c05b. 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/CNZ792100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0baddf1b62fddd96da6c3845ac0dd302bc5cd4647aea555216f9d3a484d3f0a. 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/CNZ792100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebe81af5caa762a09dd719a0938a8f78f406bc7d0154fe048618e76d8a73c21. 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/CNZ792100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf52daeabfbb4b482dbd8eece1f5e1677c54d08b4b34f1b5be495e1c92ae0c7. 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/QMDA72220443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be351c808a86ff0b0deb0f5be0ea2f3c8a8b9368294ff97414355b2b30259d8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA72220444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48585b31fa3b3e72eb72fb36de666efcfe73d9381d222f8ed4e5bddaccc1b29a. 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/QMDA72220445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f7fc3875bbce0be2607234cbd9f77dda0e73459042a3c506f46eff4c6ea443. 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/DGA0S2400767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c93d3217f1fea9dfedcaa4ca17cf5ca99e140ee11fee15e74a947ca67717565. 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/FR2X42545426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3f35fad3107d1f5cceef94d794fc38926a79e9047781b24f42866569417803. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR2X42545430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba91e71f8de702986b2eacb120004ed03f5ed59978d5fd343b94601b0525790. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:32:32Z), 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/FR2X42545432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaad61f42231b398aaba8e1fed7a864d15d47ba130da5951a223ca5ed39a46bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732499123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f7fc3875bbce0be2607234cbd9f77dda0e73459042a3c506f46eff4c6ea443. 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/DGA0S2400767.