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 0xc304e9614937342a89ecde7f7eda4a877040b2c655de05198d499519a57f8404. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d7a2685-3e9c-4858-ad59-b817ee585590.json and https://artists.proofprofile.net/proofs/artist/2d7a2685-3e9c-4858-ad59-b817ee585590.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 0x4dcdfa24eca21666b256e3e1d8e8957cb06cc6097cf00a7724c55c12e821c300. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZ9Y21722975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce48f922aa62c76ac6f425a18c6e742a5526a5795c7dbc3fc2a050f899108a5e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZAPG1896181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d32c396959502f6f0d2e415bcf9ec33e3def326d8a382cba35ec339b7ee3250. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QM4DW1878051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75321c61fc1c51b3ac170b7712c21f88c2b81f405218a9e0733cb58470cc59b9. 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/QZB4J1849616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dd6ab3fdfe6c942af88d8eee189d98ce8574ddc0e2b06065cfa596a4805e34. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES71804630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2d75184421285256b11fb5d5883bf84cdb70a988f785a86cbbff5dc0574abb. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA41934434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4562f2a2b956f254ad65d4d1b0888f8d29605f8f66bf1ceaf82c55118de953d0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:52:00Z), 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/QZES81957342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548ba10f24272ec9fe9e05b4f2769cb908950da613bde05cbc6201779b096669. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFYW1930184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bdb9f63a712a5c4863f3ecc55ffa10e42c1a1756e9134a772cc2be586aaf76. 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/QZHN51970303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36693f03d7a32b55cb1db4e209a8c40fb08a5d8c79ed85bc4c025ce168efb55d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFYY2057701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88156b5836bcf0758715b2b7ca38d5def0e065398bfa42172fc5c3e0c70ee7c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6F2091906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a64e070b389307d3e3aa4debe44fa923a59d91bbd2bc0b24d996942a37bf47c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWW2148949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bb8bc8d338dce8a1b674efd7c845b75b02ef118a75d33b22652d54e42fb042. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTAZ2367193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceeff1a0279fc0ff1a96f3512962c21ae9c3f60a68f9ef8a13535f54f1010cf. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZTAZ2307343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1372bd5f364c9e55ff13e6081c850b6092710f44ca8e0d84775ff966e8acb5bb. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTBE2326009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4203d3c7a0ee0c98e6c145126afdc8cadc8793d2e919c2698f99d80578c23894. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWR2554814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2c48e39ade4a3314c2993bdf97d8c93e4579260468f440ffee321a69eaba27. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:37Z), 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/QT3EY2536425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e229312ba57b1bb20ab5bf2b3aefccfe654fd36b294ef77566f338435856bb7. 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/QM42K1817256.