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 0xc1cf45815ff425b783730ec5e97679cb6f9eb628115825d9876c814e34cf3bb0. 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/27ac4c4d-a7f4-43dc-a8af-24e7ab2dcee8.json and https://artists.proofprofile.net/proofs/artist/27ac4c4d-a7f4-43dc-a8af-24e7ab2dcee8.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 0x3dbb3a4820b10480ba57b33325af490d20af283fbaafe4eeccade659a3a897e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZEKE1809608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efd74342d70983666d60c18327b6084d69242d85cef69bfc2434e3cbb16537e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZEKE1809609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe78c820fff227a5886a2f932edfe98667796b7be47b383fc3f2c40be160172e. 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/QZEKE1809614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99020ead8529176ca21bfd8923508e6152e4e0a044d872fd03b63162b5ea7366. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZEKE1809618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961a3102b2f82a4d04aaa0e32d6f3149f86ed17663cb9d220004fa8cf3dfdac3. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZEKE1809619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3efc0dce81e3cf2ba7cb3484d9764da9afda514b7cee19866df52fcaba9ade. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZEKE1809626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7136e5b1104db80b12a2943352c6eff4065ec503eea58cd75b756cccdb597f0. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZEKE1809627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478ccfafd4bdfbfc6c7cffdc40d707fc59643268c3a377379d91611d9e7d749d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZEKE1809630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2a6f61945fc5f9f0a490bc5f2cfa1b39ae8a4b7578893d8a48d90c054478bf. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZEKE1809635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc449351f5f6e88e300702c3b17227032deb2ed0ae2d98bcb28c9cad8866001df. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZEKE1809644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d59c4aee7056245a1d56804fa97a0b244308ea4846f45b06164e03d9eeabe0e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZEKE1809645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976ff9a099630f9c6d06c0be10d1d787472a25b270eca2ea9c6c9996f27c2493. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZEKE1809646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04828a5ad211ff810cd16908a68f26ac0dae1da5741d6de0ece3132d1769902b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZEKE1809647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9704dec851ff03059e88099479092d3a1d19cd93e4946549789b2124554e87d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZEKE1809656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519f2089fc5025960a439602b3960b48399da7b6b8587d9b9a0c38b9355c5079. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZEKE1841753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc647e37193159fbe6f8a83b10b16e4ee190ba8667df71f8f20507a276b421bbd. 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/QZEKE1842835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2040b42338370492b3ef4e2455f17013afd8b875ed5f0aa51f2b59946ae843b3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZEKE1842879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56836aebf6978cf45e37643f1286cd541c80bc001dde1e8aea020cfc115d0b0. 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/QZEKE1842888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aac2818b3f9518da02c8e978f32a15b521764317d751c8a9d8aef888a050351. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:02:28Z), 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/QZEKE1865696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1af6aaee0a722a47f21cf9816694a543a383ca90f0021345586c1b78bf2388. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZEKE1866467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3c19d5e5c85830e92c928e36c5f9cbbf8f5def05f449350ba92fd3a6a5106b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:44:10Z), 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/QZEKE1866473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b756b3c954a7f3cef0115e4be0cb0fc96ccdba321183362fc3ec3e2efdf7ff5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:04Z), 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/QZEKE1866524.