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 0x1d324eae87f40f6ed4a75245e2bcc1b6d958d954f25a0da10f755382e4c62d1c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40735b9d-5dbc-4c31-9efa-787b8cb0890f.json and https://artists.proofprofile.net/proofs/artist/40735b9d-5dbc-4c31-9efa-787b8cb0890f.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 0xdc227ba588cbe0b1a64f95d08964e90e593a5eb16c6c62521f65b3a638494ad5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:36:56Z), 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/QZFYX1958254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab256ba8fc17842a1ad41f02824adb1bb06d4d825e811f86df4a004bbffd9cfd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYX2088182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe6c1568f6071487f0c19cf4873b4083f76c807da010f57a8120287a812271d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZFYX2088184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8ec56b45022f2778c00208efb706671ce8b69a11486a06fd9eac0c477b603c. 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/QZFYX2089392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475197d0e8bb5ea21e80a9d6d64be9adf1769ef2a403c2ccdc64f896807e80ee. 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/QZFYX2089393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50736f8bc9d42210ddbd637f70f12d097e56afe2b6f4ed66043c2d3785c6b31a. 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/QZFYX2089395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf368dbee486c6d9a5eb27f97ff8b8e59381396c970aa2235707e9ee6a5a08f14. 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/QZFYX2089396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdf78ed9c46547d21637ddce5f6aefcc50eeaf5a3b14f4a04f06c41affea81e. 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/QZFYX2089397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7779e90b440b7885d242bc1e05b90723abe095d4e9d0e53b7665317a234b24e6. 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/QZFYX2089398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3445e158b647ce13d1f14bc230b88bfaea7fab66de8fbcdd211f98b81c9cdc2c. 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/QZFYX2089399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd89158985b07d0baeda33796db9b4a790484998ece613811bbc0c8de1a9ed5. 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/QZFYX2089400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f32da7ced9d3359e658c7cc5806c096edcd662ac4893fd67d7b6b1f7ffe5b4. 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/QZFYX2089401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff663ac4a0421cc4dd9ccfb081ddcf222cc8d20b6f62b44240d717893567adb. 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/QZFYX2089403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07683fbde70b6b131e551b6dd7d79caddfd564087e9965d383a20d2cf1d966c4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYX2089404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199416549ba0803eb283103b63d140a26c30422c2c87ecfe06e08f9fee4a9c64. 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/QZFYX2089405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c658ef10d70e0aaf7fcfe3b4a2fb1139a7b6c54f8a9aaf5a55f885eed947813. 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/QZFYX2089406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba3abfe7b20c9806846e0d2f98fa33256408a0533fbd5cabb08869ccc51265a. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZFYX2088176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c7a17a2d1497de819c43baa88459e2219225f26dbf546a4c67d0651f9c2ac1. 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/QZDA81982606.