1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xf3e2640224ccd679ab9657a5748f48b8982d68fa66a939643020013f44fce935. 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/7fffc001-fba4-4dc0-8445-83f8ec476a3f.json and https://artists.proofprofile.net/proofs/artist/7fffc001-fba4-4dc0-8445-83f8ec476a3f.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 → block OTSBitcoinBlock must exist at that height 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 0x09b2300169ea0d3c4a8f72ecfa160e04c669af7875e57f8e1e3a13c19e9ce071. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES71G1733018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8c666c1019bd995318ffddb25cb3f7098b8a2e356574b71a2d5c16eae84588. 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/PTUM71800319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb182ba762e666c8844d1ad4c40377a758f61a927d9d12616e1541f70c8c55c0a. 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/PTUM71800347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fb162489b2fb18d6bd79d402288f23e309c11be96b7d32e8d8c9ef894fbd5f. 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/PTUM71800345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb182ba762e666c8844d1ad4c40377a758f61a927d9d12616e1541f70c8c55c0a. 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/PTUM71800347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe40d5f126bb8c2f24b63d8d119f5fe674a2e7fa615dd8eceb24429e034dd63. 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/PTUM71800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8c666c1019bd995318ffddb25cb3f7098b8a2e356574b71a2d5c16eae84588. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PTUM71800319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c4078d5d565a766649424d818d3124db1d418b8737e6077901685702fd3ff3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PTUM71900132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fe0eadcfedf01cef251af2a16c65e71ecba87293ffddd5fad2066157e3fb4f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES71G1733019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe135900f7848f2baff653b8bfb7b8751c4c7a4502ef98aa7445f3042cc8de361. 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/PTUM72100749.