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 0x586f3b63b4953ebee3f0c4ee948cc6349223c1a86807e424b5391d48d1254cf2. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcb71b81-bb9a-4a5b-ad5e-509c440cf833.json and https://artists.proofprofile.net/proofs/artist/bcb71b81-bb9a-4a5b-ad5e-509c440cf833.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 0x7b3cb088e056103b0ae57f10b05a1f209ef5ab7c7c3c6989826cf8fdecefef31. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QM6MZ1503840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1129a12cbb9bf22040da48ee0c5853f420a02937bfb99e0d5dc26c3a807c418. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:54:41Z), 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/QM6MZ1503841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f93ccd6f3d80f90992622ab95be4a4a8eee28101d417a66626f9f7d4f427b1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM6MZ1503842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6f34517f4c21d696441769e02188244e9ee6968d605ba31184d72eb117d84d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM6MZ1503843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16c85d5798f63ed1b4d55a841697acd5f72cfc18f6164496741f6ca9e963e2c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USZUP1110708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb847b17a491ae0f70538c181654f2dc9bee02e262d19242f8b29a7d06dc521c4. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QMBZ91902168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9daa4f3ed11b66697b576852ed5d7ad993f1477b00f1bfea944b8d1bef4409f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QMBZ91902173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e83db372e489640f36fbc078eafbdfce35c6fa938db021c7043466961707722. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QMBZ91902178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6f307e46ffc23d7acbd76d5dc1d77a0930ef31f986c42b77ed0e3cb3c7148c. 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/QMBZ91902179.