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 0xfa2d86b6c558ab764701ea2d319344d6330552b59baf498f5833e668ef769200. 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/302183ce-df01-4cc7-8bf3-1f9603be9f46.json and https://artists.proofprofile.net/proofs/artist/302183ce-df01-4cc7-8bf3-1f9603be9f46.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 0x0a7bdc0e52706698db74913dd7fa859a49a2023a907046da9a0b2d582b7e88f6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NLW2R1710443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7eff8531ae6d75c62ef235d21833a173caeafe9abfc032d6edda87c9749d13. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLW2R1710444.
Het Is Weer Tied Veur Autocross (Crossteam Kalm An)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d3681602989b61913b2625cc7843ed7a24ef274c0e5e7963496b880683b0de. 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/NLN2K1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a87915f3e1075c019e43562cf7db20f3a827df825233b9faf9bac01dcb3fd36. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:40Z), 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/NLN2K1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67bf3f7c3a7951407a23e364b2edd53b6d400a307dc8d9f1dd8f21ade36bf0c. 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/NLW2R1822976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf21cde9ddcf69b65cd0539fb62e8cf6122c27ef3011e92a6d650ff62393e3d7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLW2R1825216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937aa76940293a0f0c202e8cbc525c38725af5564a76706db64101fa37265391. 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/NLW2R1823367.