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 0x52d737a903d64e24902b8d3aa05fc2a30a681b2d558fb8563b5385029f618c9b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0d18846-0592-4c88-a377-62fb39a51b1f.json and https://artists.proofprofile.net/proofs/artist/a0d18846-0592-4c88-a377-62fb39a51b1f.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 0x4efcfd4b524838f47462144c6af028ec81290a0235f324c8847d778dca41f607. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2420820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741c11352e68b7555768c4fd8228b0090a148a1c180f69efbb95a15bf81520cf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN52457248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f0e091cfbd191a8dccfec6833f0828f6b0d6993fa5f0b8c8a44cdb26ce48f9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFME2322668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4282192b29f7ed8bb0f8ad594622967400843a029d75824b058aaceffda5db1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN52457249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55967538991effdfa7bb97aff1e830911a70625be7ba2a4e7f08c72cecde7f68. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN52457250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718208ed3e3616275af3e46941448c7ea95e9fd8c8ae4ad2730a866a6a50bb14. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFME2393095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f78e838ac7d25214c86591c9865fc3c0265e18c7d8c3d8e8871a4f25b94b13. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN52457251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffe37708a9b176f3c36a01b71bafb656d9dbaeabfb1e2742bcb9bc86e3a4448. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAIU2492782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89abd2e6587572cbdbfa9cc93ddccf134f1ad581306e52bf16bad28b4bea50f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZRP42421945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22ed605dba35fa72b0dc2b5a163a409110a23f1abb4af2ca8ce69b6a66fb367. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWV2455871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0c623c12867c8338ecca66bbb53f05b342c069de50f93deb91c7087c640af8. 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/QZMEM2422258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22ed605dba35fa72b0dc2b5a163a409110a23f1abb4af2ca8ce69b6a66fb367. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWV2455871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0c623c12867c8338ecca66bbb53f05b342c069de50f93deb91c7087c640af8. 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/QZMEM2422258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0c623c12867c8338ecca66bbb53f05b342c069de50f93deb91c7087c640af8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEM2422258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5f40b3bc67dfe9a2ad127d7f5382ce623fed56ce3eb5e13f424d0c0f0aa0cc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6Q2446511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efcfd4b524838f47462144c6af028ec81290a0235f324c8847d778dca41f607. 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/QM4TW2420820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718208ed3e3616275af3e46941448c7ea95e9fd8c8ae4ad2730a866a6a50bb14. 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/QMFME2393095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f0e091cfbd191a8dccfec6833f0828f6b0d6993fa5f0b8c8a44cdb26ce48f9. 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/QMFME2322668.