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 0x84a52da8375a0cbb6b1532548beabd9a7e451b61d0a1df88694ed06eb13094d1. 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/f408118d-14ec-41f9-83e7-03a365a8a311.json and https://artists.proofprofile.net/proofs/artist/f408118d-14ec-41f9-83e7-03a365a8a311.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 0xaac5e9b0f338e6a8e0d21e4932fbba35db57d9143039d4b5175f1f8e70118681. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWS2139649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628dd4bec4e93fe64f594a592566f0e81c54b04e534048ee62030eddd6e4ee5d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZES52211803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d58ddd6c8a22cb12d669f96e29d47a63b8d0e6c5707917a8afec74d2a749160. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZES62283570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e73cd0df3fc597ca430def2db832d4f455a47d541a679733be310ef70c3b75. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES82287869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288a540e3c8f8125a4eb736c9b1e61d20ad2d803467f0c84ea85b098581c4c35. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM4TX2391013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda892d9551261f5bf28df4cc6e30c661551d5f8852d0ab63217cab6869ccc3b8. 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/DGA072310292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533d8178a2f840c5fb0ab3f8bd35e50cf4a40b4be4a6d61763354690ef37a67d. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QMFME2351533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3540cc882c1cca69f895b7bcfabead4ef4fe4facfc5cce293ed4814b5a57d8. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QMFMF2311817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacadbd56d218176d5c906ed644dfc70167bedc5ea9a79c75af44073bc7d0e1a0. 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/QMFMG2355629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f88df6af0b2c2f3b0eac7b5eb10f1cfd20532318f919248075a3711aeec288d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TW2495670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2dff283824609e8e0e112ffc9f134352583c50a56e7512fc31428fbce5fde1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMBZ92416537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe425dd2d7c1f6532b3e0333eca14478d07d5eb1dde3bfd5520899d240dd07d44. 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/QMDA72458899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf574d3b14eed1e83d54dd5bb2ac6d94f2e4a2fb09e55a7dbf3ee39e88c7631fe. 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/QMDA72458900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13bf8cb76d81a4c8dafef07e842ed784b2a13ac2a6a3eae4237b9663b295482. 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/QMDA72458901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb53ce0ab1778dc991f9e821ab2c6e1c123f3e8c46c906327e83e1eea563a3d. 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/QMDA72458902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f2b3d47d48a4e7dfabd9ac6639d44ec1a7a158d18e6c4c7bdeb48b8ffe800f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMDA72458903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b242d5c91af8b0a939f8d779a968127aad8538292e7441b1a835b66da38bc8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TW2510958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edcfb979a54b1adfc998caf058d47fdd289f5c4954aa72127a21aa274ad65a8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBKQU2511445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263c75560dd6004207fcd9d49a1e701c4371c9f5225178133578f98cd991c1c3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:35:03Z), 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/GBKQU2511446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50497373ae4a76cc55194751b5d49b8400664b3187b620dc34d110da02158101. 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/QM6P42305344.