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 0xfe3ca0bdc056df9bc75ec699881c894968e276070a42018168b7dc177ce67d7a. 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/41a74bba-5546-4354-b9ec-4db2a3e68a87.json and https://artists.proofprofile.net/proofs/artist/41a74bba-5546-4354-b9ec-4db2a3e68a87.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 0x62d8e167eda7cb6b5d79817eca8f22a3a216f1bd1052e36c3c1f6b8a252ce977. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9M2426795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f3b7cafdd38944f34d0e2b66b1d940ad61d95b62880065f9a2d0b15c7ce917. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZW9M2426796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e51a7a3073a3ee7013a0db17a86884ff91e51f71aff98181089ee8d468678fa. 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/QZW9M2426797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142abd3e1152ee3a39bb3abe0f991ae683147a9e1cb050eae211b37f91c54a1b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:13Z), 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/US7VG2539870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf742267e24a5e6dec6cb0a8e24304efa0d00347debddc0bf3f13c6f8c8f89f7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:15:41Z), 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/US7VG2563835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8437f5831f59733a603d0be9039cd1bbf0a2e8f751080ccc12bf0bc855969d87. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG2563836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31acf5804b879a8a9888771a6e6bd743a643e6ce6e20600961a90a7bd7b7167b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:47:36Z), 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/US7VG2563837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477dde3a4ebb12bb456460418c8a35f8d1a562093b3770cd43f4cf65770054e9. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZGLM2503620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aad905902d147f922ee73c85718397af5901581064bca260bb114f1fcd7d66. 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/QZGLM2514493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7767ff6baf6f803aa83dc18ed1b5d17c74f3f1b7e24a6bdaa6d5923d0f4e609f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZGLM2529506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87b9bbaf9dbf2920e54cf3c772626c9dc497e3aec280b23b76ac71ce62838a2. 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/QZGLM2536864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75f9c322b8e198dfc5c510a955b377f73b5f3f87e8ec0181e2c145f89f4b9a9. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:01Z), 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/QZGLM2594016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cecb1ec823cefa72b9ce3f7f6536986e38e7c0bb6742b91774495ecbf6ecd9. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZGLS2500657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580541d193b666c5a3f799ee6763e0c25da070abb498953a89e52629fe4a3d57. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:49Z), 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/QZGLS2575938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa2bf0f615f5168002134cc49aeafc88539310e13a473f2f5354c260cbeb097. 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/QZGLS2597485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4624bbb02abea39462a4723b1ee27276b51c89e0686822fb96cdd3892d57d2. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZMZ92506617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd024acdc92caf6c1dcabe39ff6186687aa84c29d78634662beabc6b0a2152346. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMZ92521336.