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 0x5b206148b75aed923346cf1ea58cd5fdbae87854cfce9a3c80eb5db9a7a4fe5c. 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/47e99f43-2cc3-418c-818c-741a7bfa8093.json and https://artists.proofprofile.net/proofs/artist/47e99f43-2cc3-418c-818c-741a7bfa8093.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 0x7e573618246cf8b3c06deb00c16f9bc8f7f192b5f0635b150ab14ad38ec1cf79. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:42Z), 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/QZHNC2465860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68776775402b1af62c34bbc1d9a7eddbc69973c4a14c707e6539fd04451ca7b3. 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/QZHNC2465861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466f90d06e6b5df9527d76c3baf4e84cd2d2fc3fa8c238f5e08d3e96d92ffe25. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:25:05Z), 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/QZHNC2465862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d729b2d0258b2fe03d5b693f9c6fd6e47f3d03f1ffb8f849d09f9f8971d0c4f. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:55Z), 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/QZHNC2465863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6b0a138c7aff4b60d853a3cb17e5a1a21aeec0da01d66603459c8f1ef901da. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNC2465864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5add8d520f5fbab4e2c0bb516570dae29d014bb0ea13e9ea3aa7ef2e62891179. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWS2419415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe1228a505bbc32c9118c10da780625a3add055ffe7e2f8cb48556731916a79. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:03:41Z), 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/QZTB52489096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dd43bf85b1248565fe5c21f4dd231fec1cf144793fdc8e4be7a15ee73e896c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QT3EZ2411583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4177b3d15675167578c080de329d12a5c67631076d00e58ae4fa38ff8c2e4f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBE2448407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0d64aa0570cc770075511c5d57433835426dac098f2ba315c6c53a0f7a57ff. 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/QT3EZ2411585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6492f3de6f3bcecb47b4f546e4de8f2eeb3f375d7aa881fa24ff0e125ef14bc8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QT3EZ2411586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc79d91113053ea07777d883f9704da528e2362488c09c28d44a80e35a11f42c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QT3EZ2411588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a97c0b484f8a93bda69cd209fe9a8895ebb114a3512f25927b1a909b520a3a. 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/QZTB52489097.