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 0xe1db799043d919d7053f5ff8728c4505accdc7cc2f405f8f0793c3e4d3c13040. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7eddf5e2-247a-44bc-917b-0a8731d584f4.json and https://artists.proofprofile.net/proofs/artist/7eddf5e2-247a-44bc-917b-0a8731d584f4.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 0xc173da0293584e59bf8c2b21ef2dbeda8ca0ea6aa3ab0f649f2064ff0da66198. 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/QZK6N2576038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d796baecf95edc0463d89483aba8bb691c4a16b6f6769c658c3c6ca4a4f0de. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:38:18Z), 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/QZK6N2576040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe5b0e7af9a46ec57d92a2a4d8d444661d64d328a5595f615dc0f9b00e3d2d1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZK6N2576041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950f02fca98f0b4718cdb4ac54992627bd753868ebc896ed3f3b1ea7fe07b7df. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6N2576044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cf48f9bc74839fdf06d921bdd7a30d7dea87c4d6aaf2329c8d17c07bb7d868. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:03:42Z), 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/QZK6N2576045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281537711915952282443ba5ca545e164c7b40405036976b1e55b0e26cc6c4bb. 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/QZK6N2576046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe5137b14be5dca019ce329b16d2191175b8a70523142dc1aa2d9083ae7c5a2. 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/QZK6N2576047.