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 0xaad37fec11659f4d88fef7b12c3f27fea6bf493f8104b4a510206798b614fd5a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98100fed-79aa-424d-b9fb-8ce0cf38bfb2.json and https://artists.proofprofile.net/proofs/artist/98100fed-79aa-424d-b9fb-8ce0cf38bfb2.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 0x1b6ac127e9506ab225f6a38510155a6a378da525ad4c44ef189a3f2890607889. 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/QZFYZ2231236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb1e62116130d672b30ff0acc5dbd850f7b153af0261e4b68d955474d6962d5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYZ2231237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd16110816a354f3be1fa94bf09306a3934dc0a8571ba36b5f627f5350305cfc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYZ2231238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dbbe627be79c6cded67075623bf3aded68d5df52b262645a0a089472d4d660. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZMEN2233168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944440572c62c4902f9ca483e7745b276f607ee30733ad08f00e79eef5b50017. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNWV2224163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dd345911835708e33c83cb7cb68159863bd8d9699804844298394d2fe16aa1. 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/QZTB32275221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80309f04437f774e1d7aac8dbcb62f9b8cb4a4ed313a7902d1828721701d0b4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:30Z), 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/QZHN92327445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc099c06b28adec517afaee680c551a1f07869db3538a87ad66c58e8a3aa9dd3b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBF2390209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ddffca088eb95891a240b1aa6db437536442fd8a68b98261f6b6fab4e76e5e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWX2432633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea37476bf61f4e8c5b560367ae725337268800cf893c710a3ef145463f1c494. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTB72466238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3039267a12ebc4e4a92cae018adb4eec852a03c44dae5a29a5c400be42de71. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWS2519442.