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 0xddf729fb0b04aa685c8793f44411d0af55fa95aa490498fb7f139d01c9d27d8b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db1a2f6b-2621-4405-9886-efc2e1aeca2f.json and https://artists.proofprofile.net/proofs/artist/db1a2f6b-2621-4405-9886-efc2e1aeca2f.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 0xc91a698a0d3d0ad256d3e47c9cbc2dca577b502e93eda1cbabcda6ac8cd5b02d. 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/DEQ022001922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075a951c73754b6c6dee93a5da2b510be15ceeedf397fc33b8100ee1c7c2976d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEQ022007606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccac2c152889ae7cfccb6ac62cc1e714339bd33c60f2a71f2a4e8069cd3dec7f. 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/DEQ022101047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2305e6677b3a6ea7cb59d9bc71379dd3f46f56da51b4a3afb956996aecd8f385. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEQ022116324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c745ee8983e7ddd0f8e675e7a7fcec21b852bf0ce31a1746c2556636e50bd2d. 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/DEQ022271523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47f486480dc017dbed0c9610c329b85bfc790d0a9e214374bef50d42d492f01. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:07:10Z), 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/DEQ022282984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe344f9832b3dcd6f035ea1595a81b9e333f1acadc4a8326d7e9c3682fe4d2ee8. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DEQ022284660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf50908ff45684c7622655ae942d21e49a49c9f1a7ef71b536eccec87826f33. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEQ022390057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c97bbb2341ca1fe9228cb4f8ddf83bf98c1f142ccf5475ceaed9e8a908ec61. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEQ022392065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd89eea5fbf0624938c93622c3d2e7949ea4dc20594ad5d3bda9a8ae8931eb70. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX202440904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662f90f53ed5b19c420fff447d55b9f7d35b7c9d89c6c4af9a8f2e7874f2e557. 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/FR10S2545749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b44e54dd5f65e67c8eb3ec4bba5c83ea2659029d7ef5cd78428da31f7e0754d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:45:14Z), 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/DGA062503562.