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 0x49a7217c0ac6a7b6cc23af289fb994ff1215e0a2a8817d8431bf86e411d17edf. 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/b9960e1d-fd25-40de-8057-ce117e8c7580.json and https://artists.proofprofile.net/proofs/artist/b9960e1d-fd25-40de-8057-ce117e8c7580.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 0x276da2dbec517a9def447c625dba4d3432eefca5eed088bb3af5aa8f39feb1b9. 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/ES75E2501014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7807326a83dc6b84e0a1b3de8cc90cf1bbce64e59159e4ea971fefb1e1855b74. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES75E2501143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb003bd616161ffff8edb9a890f53c8ff88601de60aee82719baf742a141757f1. 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/ES75E2501144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274d0d866d8cdda8db3507be3a671a4b929e17ff195cea1188b80ba21f9a4615. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:31Z), 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/ES75E2501152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d70dbe5f11089628d55a1cad9aaed7f98143b3c5ce1db1bc9f62a01314a110. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/ES75E2501156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdedff0f37efb61b72bab2f32b47cdee2c35918f56f389e7a39384b9ce40a52. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/ES75E2501959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e53e91f478c3ae8a7b598f958f69db2cefd43e91a565a5ade3d83ad46905dc. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:02:44Z), 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/ES75E2501954.