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 0x07e6265c4131b0cb7831869abeb0e0385d4874e133cea0c5f04ea4a35631d6fe. 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/d4bf9be7-70f2-4e1e-acfc-bb4c66ae0d81.json and https://artists.proofprofile.net/proofs/artist/d4bf9be7-70f2-4e1e-acfc-bb4c66ae0d81.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 0x9db269d35b0c7f2cf8fb57dab671a0c09da3ab30bb5671709319038051299c8c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/UKEX32032900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9421600c0177cf90665d26791bcf64ee813f88c534411c5b196dc4b3c5491023. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEP551919776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502a0c933417baa4f47a20871de6bed08bc6760740425612643840eb7fda6ae9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:21:26Z), 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/FRX282223428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d32b9ed4478a386471d2ad7bff3b8637bff30880f620b54fa6a96ef6d27730f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:40Z), 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/FR10S2364578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211aa8912d6f6c2d26e71dacc2e2fcb19c0ab9d9fffda0e666bb348037f1f641. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:09:36Z), 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/DGA0L2338300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1761e6b170ba5f61fa13b195d18a86aef0316d1d5ed9cd38a555b1c726f68da7. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DGA0L2338301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd472c8eaf5d0b2713a8117b9384f3f95ec8a21490b2a221edbd019cccef4d1c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA0L2338302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0344c5ca8518b70bfc35e28b7cc070e2a296c3ef127912757cfd7b32e752d0c2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:09:14Z), 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/FRX872373630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c60d0082a914e8d27a26f95f7834ab770a71e46fa5a708ede6b0f704fe10417. 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/FRX282419737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb556c778189f19d8dab2c21eeb45ace10e78b0fb4e350b96e00f982c0d919be. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:02:50Z), 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/FRX282419738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d4ca03eb6318e0f67fb42c57e17f7236e5d6817b83decae75aedd5aca01649. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/FRX282419742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca30bd54c724981c790ceace03572adcc19fd7ccd3d918d346dff0d5f7293c5. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DGA092471735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa377ac4fc51e7650f5733a19474b2e2ab86792e8d7a9820f6c2731f35a455f63. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DGA0S2457199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6b3460b5a8fff52d729070c83c98363f0f6346cd6f1dbaaaf876503388d6d4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FR2X42535806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfff61d9ec4690c21df5dbf4444752ca012c0af60e35b3db948e255bda3949eb. 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/QMFME2595678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe0f3b8f3fa68ca08765b41e1086532468c52a000bbcaf3b2a211ed8f334215. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QMFME2595679.