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 0x79a99ef2a30aabba356056e6f97fc5e0a7dd802b7e1f0d54b36590ee78fd2fef. 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/91c6adc0-17b5-4a63-8b1a-324c0b3ca85c.json and https://artists.proofprofile.net/proofs/artist/91c6adc0-17b5-4a63-8b1a-324c0b3ca85c.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 0x5131dfc43512649eee1ae2a1653122b16b2a4b579c60c73e8a4b60438ce56a8c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:21:55Z), 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/USA2P2311317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ad3b43a1cc72e66a30e258da43ec8dea285d5bf590cd85d47d095095a5ab93. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USA2P2311321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60b3b518f0e791009fbadd0e59845987fbde163b3bf1393b9cbe504efd9e9ab. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USA2P2305978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f06680b5d98120aa408802528a509482502c3e83a032d72fa7570b90d54ba13. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2321811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60b3b518f0e791009fbadd0e59845987fbde163b3bf1393b9cbe504efd9e9ab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2305978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b45d2a98921b88d1fd312aca2f4fc11fc0d87c6dc57a93e96d1752e698f8ad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2321808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adcfece5d9de943c5d9cec9c0d24969521b0e17a729a5bb25f01efb3d322d6b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZYWP2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a27b886f8c5a9f27ec440fbaaffc4fd16792f151967fb9090ce8f3b904cd3e1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZYWP2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1da93190b6ae7eef6a6b4e5cb8324141792d0760c47ae025adfd050fa360044. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZYWP2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe00bb2870f93853ee1a37ffd2aef7ced226a03edb1e9f81e8ca23546e7ffc77. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZYWP2300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89481d082e75a5eaa48180b9dfb7c799d8e6148af8cb31f96e5df255ac220b14. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CLAA22300259.