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 0x47abba31b3c000cdf544ceb2d7692270154d1d581581b35b9a0efbd27fc99e46. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f0ae5da-99cb-43af-a1ba-9c8185288c29.json and https://artists.proofprofile.net/proofs/artist/2f0ae5da-99cb-43af-a1ba-9c8185288c29.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 0x564b153be94699f069868d30357014b84ea0eb982d80b6a0db0d7f7fc895fbf9. 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/QZTAW2242724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a75dbcda8792ca92fe9767ca9cb4cb250c3eb3f88d4ef277173d97a98c89f4a. 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/QZTAX2270033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad5ad0f6594aa0191633152026d9d7369398fd83f9dce040f277111f1d023b4. 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/QZTB42281105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a642718e9a9bdd23d66c45d263cafa5e18c8624ad37521ab063abcb11dadc10. 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/QZTB52207754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285d8546da90e15c6be09ffed0da52ce7afc18ba8dcafcc3ca7f83e0ff3cad01. 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/QZTB52224243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee515516f1f98c38ccd07af233c7a71683482915843cd3f549c20db85ac2ea27. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB52207745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4456df9657c9b212844c0def662edcd26ec8d18ab5f7ed6c9d9102330bcf11. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB52263618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32bd7c998e0c1da50d81d7e7f7bf2b55b0ee7befa35d3fca3e4857ec9520caa. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHNC2372872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00308346d9ae119bedfa9ff9a5c97a0b8c176fabd58a3ef54529b9dedf9694e6. 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/ES71G2333389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224b771255ed78e26bef66ff80c18d20799437b80fe230424a2f369987712d75. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7T2489850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1809cb662bbcfcb7253aad222bd0764b68899db79e668512772b267642cfdab2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZ7V2464326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85924024c68826a3047a4210cbd790a31fb121592be8fe8ca236d9a7f50f7e21. 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/QZZ7V2464327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511f6200790d1177f63f90dab5b92c95a658a3e89bdc5400f8546c2f5bbb8a65. 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/QZZ7V2464330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3efe38bf3f64efef2539f7411f912cfa65ef031fd0265df9ee2e95fdbd590fe. 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/QZZ7V2464332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd5e202a53b2dc87fd24538787d49e68f05eef7ecc7687f18bfe52f2e78402b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:43:51Z), 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/QZZ7V2476307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e54077042d781680a53e7f8a97daca13852566ea72478fbcdc1cf5d6bc8936d. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZZ7V2475707.