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 0x530649e2562389b1e273be46624590fd36c9c35cae00a39a26dc02f015784cf4. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74a665ee-3457-4eae-9e9a-219403331bb0.json and https://artists.proofprofile.net/proofs/artist/74a665ee-3457-4eae-9e9a-219403331bb0.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 0x99d51eb51e8b6e18f273ba5edb72a6f7a574dfc2c6b74eec9121211c4ff1e8f7. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZDA72092058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5694967d93116096a23611104595ff5486dd6bb5e40bc2eaa1ab61b9800af18c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZDA82070716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61a5966897c6815c8b7c107a005a9e808b5ddcac460265379005dcb2813ad0b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZES62065326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f9125efd769f0920d3f8bad7ac3615e3394e70bfde31ecb570e058c9d000eb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES62061128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfe5d63a47930b5ecda496be1272162fdaac6c4b74478cb6f1940429453121a. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:53:49Z), 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/QZES62061251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb60a8bd363e516f5b52df7387e29a5e8f1db9e40241727797566e36f122b583. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZES62061252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec4a005c4e87caabf35447cddad32369e068a7d67e9b9a01e1b9a24b60a4223. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZES72060381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97272f43013b312c24c1ed89970136fdf71f462c62ff4bfddccc56621cafce9. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZES92009831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3243c59ce51ca13156393c9792950aaf9ec630206fedf0c18e02c528f72a0b31. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZHN42023511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60874e812cea08bc7b799018c23bace6ed62bf500cea36fec72a2a52282af346. 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/QZHN42022931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd555469dd1f3154ffd17abfbc2c70205b794769eaf4d3256a75a78e0b5f7ae85. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:39:33Z), 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/QZHN52032045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198b810a511c8336b04aceb80ff54de58d6f03c2415ade05c9aa813a2eccbe4b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN72061863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab2f292061dbed2b24a26392fb181385fa56790a41b15ff8f60b5c8dd95ce0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN92002991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edc450d15e4cd4668d43f57dfba35041e691634cc18d8bc9544ee1b5a476083. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZHNA2048800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c678b1813dd4253a42f5ea03bf1141010d1cfd233583f6bb715bab73689019d. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:23:09Z), 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/QZK6Q2095510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d563c79f796298f5aa22c857a15c01de7331626fff41c20ecbfc62ca04b6ebb. 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/QZK6Q2096118.