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 0xbebdaff689ce26df7778fe87726353f55bbb57fb408bc69a16e2c9f3cb0f7965. 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/a0e4972f-1b6d-4c8e-83f4-71a0b061f838.json and https://artists.proofprofile.net/proofs/artist/a0e4972f-1b6d-4c8e-83f4-71a0b061f838.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 0x536e094249d7e4bb6437b4043ea9e02a7151805ac887be27046dae36f0fd6955. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USDY41626575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2ff66a324f6b3a06da9a8a7ab92be464ec7b1d4dc9bd347ffd155a6a7261c0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USDY41626582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cfff35052bfc7e1d3813067cd2d384db07db46c7a35e281f4d699fd7f2c13a. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/USHM21650152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8820d4f04eeb971bd672275ca17867238e0a057ec889d238adcbf52e5d752dd. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM21650153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490a7398479c7df4e399c85c0afc1333aac8b73b072d54f987c54796915acd55. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM21650155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a228f88c51620cb4a87ca1a9866b613d3e10badf4ada2692871cffb9ccadc19. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USHM21650157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcb1d1b7175c940efa735b1234dc15591056390258caa56562e83ed0256ce23. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/USHM21666113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4f2106e2214040ae945f6b1249b0c268bc58d7339ed9baae0913d694e9207c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:53Z), 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/USHM91749630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86356c025538f73862d1cbcbbc79d781afe2cf4731d0cfeb65531059ee1329d0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USY242495613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea0b90ee0d434c91b93f17fb98937fbb3f7e6df3a8fbb0b960c3f85bc1f3aab. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USY242495614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdae5886b19f62a474663cee3764b67007c867ca1cd6839adc9e33700b6b5378. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/USCGJ2538587.