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 0xb7967a9b8b3669e6d0a8e9ef1502cdb7293be93fe9e9e9463580b6a823cd11ef. 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/ffd917af-6867-49e5-bf44-7a8c51b362ed.json and https://artists.proofprofile.net/proofs/artist/ffd917af-6867-49e5-bf44-7a8c51b362ed.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 0x1507ad3594cb2de5c8a8f6b329472fa97273a809e90300896900f14f8fc77ab0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJX2407457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71261521eca0c94ea5575632ab2c789e7c28076238010a8b325e7cc4774f4bc. 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/QZNJZ2475597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f481d70e68a64059765e1c98d9ffdefe5ad81f77dbeb597323785b17c6d1fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJX2431701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea8caf9dfa302b6a26032e9fac03d5bafdbbc541771646498a3fa892f06fb14. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:31:41Z), 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/QZK6M2466811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7f968f6fdb513d98f8f0371d9f83ce8d40743a68b9af4bd15d78c72d53f6a4. 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/QZFYZ2488924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5e3282a915fae3441bcf01f99acf8de987f4cae721e3346ff3602e58409e31. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAHO2317767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bda271fca3c6599a51db56180f84b3257106028ed37f383cfe1adf365445a0b. 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/USUYG1515541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cfc2e94c048cb3085e66e1fd014f0f0e929a093ef302a13988a3d8f53e9547. 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/USUYG1508704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2d53a7a868b477d49f3c2a34ee6dbeeef806eff22865dedd6d9752e8365d31. 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/QZNWW2302535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4866da2a9e8ee0658a588a163d263f9f4851ed3a85b99af38afa282455eb4019. 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/QZK6N2352682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffeea7ff4edd8336b8f985cd2b6ff498b4f07a06c2fe7a290e8961f3ac88f00. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USCGJ2371340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345907f22168712e545a9730eb99630edadb9eaa78d2e35be91d3f8012087a34. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN62399797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56ab4648030f1b521a046252acf6b2a84580a7b4ac22f8803c8ee348e7e9fdc. 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/QZES52396697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca2640b3f20ef9b7ab37ecf9dc9f257b7ea3f8174e51473fb9d37988152ee0d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUYG1470446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a479d453a04835f97bc424779243c57bb881213e49d99c76c00b2a7a0b5e9c. 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/QZFYX2313802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e77986eff96781588fdbdf9156f344385ce8765d3c3258e8a650ac8121ff33. 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/QZTAW2298015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde611ba14708976dd5d5ff8a50495591a5d3ffed737e9b4bc68fa242ce2b1a64. 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/QZK6P2249683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288a5b0620cb44c73f61129acd810a8200105635faa1994b337fe6366837113d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA42249041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed54f95f21bbd664928c13ab778ecd841bb1896933dfe309f571ea1b500f289. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLR2177513.