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 0x15bb558cbe1f664177cbfc112142252a027bb64b592e1a6aabeb955b76cd5eae. 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/daaa9120-eab6-4f25-9440-9b00320b57d1.json and https://artists.proofprofile.net/proofs/artist/daaa9120-eab6-4f25-9440-9b00320b57d1.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 0xa3bebe7a71238365add21ed7de11a8a27fde3da304fedc524ec313eb559a2cac. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6YT2205201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53edf79503b17bd74d6a3840400271a4762d343a5484795766b0fd4143053cc3. 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/QM6YT2205203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ef8b085919f063dd4797ba391f84823bdeee167fead2f072361f949236ea48. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM6YT2205204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb926c0c131565236f9735f55e20c7ce5019c043dfb24ac5bcbc1ae1739cfd0. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM6YT2205205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a2ff87ab8392b450bcc04ee067cde1bb134b0e7cde861af64eb9d3968eb1c2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6YT2507002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe244ba250f4898042994c899acf28a0a0eef254cdae39d98ae89059331aa979. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:24:23Z), 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/QM6YT2507003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54273c7fe47eed48b7ef9980a405b480cc633a7f5e1eb0cd90eb07fba9fb69c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QM6YT2507005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d371d6959b395fd09acd46359cf857ad3356eefe50d92c8157afb9d21c13fca. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QM6YT2507006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5795f54d2e07d89f5941c44d40282d370f2416ae96d2192b8af91a9819fe8ac0. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QM6YT2507007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd192c9ff472cdc3a79ac92d525d7eb207480411e29e30685b6eb99a657dd63. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QM6YT2507008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac865287ae3144fa68a224c1890708ded70df1eef69e3eddb7369850c79119e6. 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/QM6YT2507009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed94bec334369442056b86595c0ce3b16a7769dc66e7ff70843251ff3e107cf. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QM6YT2507010.