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 0x0ec38cd427213a1e38e8d26c768406b1ba09e6b5c49040ecf5676f7d1260dbae. 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/4902f914-bfdc-4360-88cb-ad750412baf7.json and https://artists.proofprofile.net/proofs/artist/4902f914-bfdc-4360-88cb-ad750412baf7.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 0x03853ec1d5e86639c1724852df00bc579e5f3c491c99493af8ea74de149a3858. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BX1TU2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb485d82a3c24a61439890568e1039f2ca9c5cc30eaae8d0ba63f8dca2d7364. 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/BX1TU2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166ee4df85f8f2a5391a58725c5aca4f498d841a2e0dced649384818f3eae6bb. 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/BX1TU2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed7f8070ee8e987a37d53e923ebdba8254794c0af53839d3f8927542eca4304. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/BX1TU2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ecd2f503ab8c7111256d1a466d36d6202d5f4c8fcd513c13ae63ff669643ad. 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/BX1TU2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f378592bbd4040429169eb811e420e8173b3c0aba40466bd103131a5ad50ce7. 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/BX1TU2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167e0c1fff616f52461319c9628841679f3561825b574925d6a7261994bb8bf2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BX1TU2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1e56797b948055262697c0e2dd59ec9f4a5d8870a8b52546496868de332ed3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BX1TU2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948325e67a25e1fe80bb00750736658d266d102be43b7a65c1245b6d4fcbb15e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX1TU2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166ee4df85f8f2a5391a58725c5aca4f498d841a2e0dced649384818f3eae6bb. 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/BX1TU2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280a66a3ab6a3cd45a187ab481e4970411e779651fdbed9637dda7f19c4ea4af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCCLR2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930fe8e5fb94a8ff7a416cc9a56b5dbe3afbcf0a3ccd59571cc0cb432f56c417. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX1TU2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed7f8070ee8e987a37d53e923ebdba8254794c0af53839d3f8927542eca4304. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BX1TU2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5543bd5a2aa7b99d01408368506953f8722845a618075a7cfdfaf3856385ff3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX1TU2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6dd38fbc78b1b19f803ee9d226f07c73d79524e045f8e9ff15efbc6e5915f2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX1TU2300044.