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 0xc5e83b3e009703529d3f4c48bfbc801bfeeebdae270f81be46dbd0afcce0febe. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d66563bf-d480-4547-8b2d-4dd393e89e78.json and https://artists.proofprofile.net/proofs/artist/d66563bf-d480-4547-8b2d-4dd393e89e78.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 0x031088a4a40c16d43754abd71bffdb29f672fc2fb1401b2b949b314e412b03f6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH2346452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f7120fa207ecc2e51e7228c188d77ade3c8e6064d77acf1ca99c49379a5074. 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/USL4Q2410827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ea3d3a32abd24150efdc91a514c9c7a91c4c578b824645f5ef75eeaaee1a88. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/USY242413834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf46c68b504eb41679b2d95a94dcb109d779b8068eb93c656c46f3c4aac4f4c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:20:33Z), 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/USCGH2555865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5819627198cdb9fb6737de0ad126b132a7cab3404b9721d0e9f78e4a3935e7. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USCGJ2543155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d23fc33017c3668e1f5f45afbe4f7beced805ffc3258fbd4942efaac2d9d15. 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/USCGJ2543156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168f924eb39ad3589b8669c9485eba16614f749d81e1552fcb804ad9d8b28c6f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USCGJ2543157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111d5cd65d9a8b141566e967a3ad3bed96b252b532262fa9845ceebe9eaf95e7. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USCGJ2543158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbffb6bf363a8c034d7351b0678a69db45ae72d95c5c6410b0934422fe0a34bc. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USCGJ2543159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d0e50373ebfe093504f8755d052aca46877e2dd0e3b75b0ecbbe00261d7904. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:09Z), 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/USCGJ2543160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc34e126b90d18ee9b88596e0ee85b6e8d1befe069d41b4e49ef89cd66640438. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USCGJ2543161.