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 0xef7f87e2c17ea4d4938ef1c70732a6571753d7df07dd726250f4919d83e4d474. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cab033ba-1828-470c-8967-b38adae19165.json and https://artists.proofprofile.net/proofs/artist/cab033ba-1828-470c-8967-b38adae19165.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 0x9aaad8d05b4812034e04fed30e9e9aad94095b169469594c99eef7621bc60642. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:13:48Z), 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/GBKPL1414912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c8811070cb554895757563d4f651e4a0c549910c9bac1ba52c1ad2be830c12. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBKPL1414913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe873f9f18a0fdae48b26f98abd910c14a8320f4e49439d6e50a40fadbfeffe77. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/PLS401600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c7c9b2f3e129e8956651d5a735b7ffc13f32d909f93d1bccceba4328ecdc6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLS401600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795efbf831dfa8cd5d16703859589322f6076eab26930c082b906bdd0016d982. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLS401600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf063cf994b6f71b5cc220c77756b546d948b96f137a25e18ad54491777941bc8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/PLS401600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33c243690daa2ed1d8795baf14292fe28ac30588719364a5744acf763e3e7cf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLS401700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c76366baf3816745bd843beb4a4116e1c0ada4a2848cb55329b7800a763081. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLI361978560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce279f0baec62cc1fb75fc09ba2de642a1d10475253efdc88488625c66c22c4. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:48:25Z), 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/PLI366734970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a9fbc5b4398e8c16714694779e0842cf900beb98116580e74fb64a0407f4c2. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/PLI365712400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3427ad2f6fd75c5052af760242b10167b3ce58b200a190186b96bd39874c8b1. 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/DGA0T2400049.