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 0xa59596022639668cb39aa75b173cd980e4730ccf48d9be72968f2cd51ffe47de. 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/945bc3a8-8273-49f2-9b94-9e84bc84f5f6.json and https://artists.proofprofile.net/proofs/artist/945bc3a8-8273-49f2-9b94-9e84bc84f5f6.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 0x97dd461ef674af7d6a3228660af24057bd8e9885191d6c6a489ba755f22e6833. 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/QZMER2204626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b1b19d25620a2ffa3006ff56f5f5969de23302a251a750b6669d665cd56297. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:28:23Z), 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/QZNWT2234603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d4aeb359d7f14acfc0f1bc972ea1bc9b9b11104220986a215944ff2d50a3e7. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZNWT2234604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4f5788d397464d3bfdf1ab39cf99621f630e5fe6bceffce50aa0c37960d8ec. 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/TCAGH2276446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df6ad021ff596fb00be7175dcf0e7307a1a3a75baa850b98dfcdc17d7c98f0d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGU2387826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b4f848a1b473e0ef71a6cd4653845329b2cd3a6f6274cb293dd5704e840bb9. 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/TCAGY2315426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc99de18de77224336c741878d9b9dc0ef11c7eff49f0e21b2170ea212a3892. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:57Z), 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/TCAHQ2397143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d30aa994aac15e33caa059fed73d214ab11392ddb3e0f3dfdcc78ac1e3c76c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAHR2365796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ddebf728aa0bef1152c2e5e465457441ef7408998da1ff3efc5eef6a13feed. 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/TCAIK2478373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9e40b4a179a0ef8da0a30d074d467d6b36bc39839a3df4374a4450dc0df289. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCAIT2410190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71133c176a9d4cf9b9e9fd2d69296656f341ccfa8329d15f586600c77f17dc06. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJA2485975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e1c7d2734b45a28a77fe2938f98fe4c39692bca49d200fcca996a0c99f5535. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJY2503831.