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 0x68678235fb71f10787821bf7e934f0863f5fa44ae828ab5cb9bdbd4106301738. 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/23944717-a180-42e8-aa97-d35bb559685f.json and https://artists.proofprofile.net/proofs/artist/23944717-a180-42e8-aa97-d35bb559685f.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 0x238ffbb75690c0465b12eb5c0fd960f5ab64c566d492a137845106cfcd024959. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:01:51Z), 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/TCALB2432099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca25b3cf447710654640d39a4c7aa75865c2491c6adf223c8b91a090bee48398. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJL2562407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d0b90c3965504bd19fba77625eddd32888620d992dd1f64f6f7ff50f5021a2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:28:18Z), 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/TCAJL2562440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c594c4b2d6a7874b63d08d61c9bda3fe6356b033bef41ab8ae675e5bc68eda. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAJL2562461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8687200772d3bbceeba0bd4009bf6e5bfc2e8824b959c78c833383c7f8b7fd. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCAJL2562480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c88aa23bd0c3e3216bb403d177c801fb8bd1c5926ebc920e8903c0ac80f95e. 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/TCAIJ2407345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c59c4752a139439ce5760f8d80570b6df1be727a2579831f54ddac5b8b45d2. 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/TCAHC2395190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc338031e5fdcecfa8e3f5571e0641b25bab0e6bf310de4cf23dbca7e4ef7c650. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHM2349118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f72abd4c8f0eb3cd1bcee29b1f28c7a05327ac3a4b25395391426d91f377d7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHM2349136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38431e1c162b493bd845486a728a77115a1e706ba9542e273577d7e2bd525b2e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHM2349219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ea70ab79729fb78a8fbb8b46a4b672c23612db84af24b20803750178f80c8c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHM2349229.