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 0x9448a410b9d7e6e0972265e5bcd0c9ade05cd3311a4f02ab9b626b6508f2a695. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42120381-1080-4591-8118-795be4ce960f.json and https://artists.proofprofile.net/proofs/artist/42120381-1080-4591-8118-795be4ce960f.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 0x440bdd8419a1419dbbd976fd74185768a780c3c0608398624f4e4ef84ac24546. 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/TCAIF2403239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd782b4a9c8179edfe85cf15a4058f405ca02abd7e58f01a1444a911f00203b81. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/TCAJB2486021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c5495e99a7e114248604dc580ea49088a789f63b63f3abe29ce3b075247413. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN92590381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d71640c0ee7732826e6d80fe60da9be4d244a89337fbed7db0183c675d8401f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6F2585640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cca1f87e9504cb3ea2387bb9d66b6cb8277b27dd0642c1c3752232e27e87424. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAGOO2507744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572406cbf8074d23dd1de4012dd17e0c6c13c2499ec89105eb2f063f63ce41d6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:42Z), 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/CAGOO2586971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73252e6d29e8c82f857b0e0fda32889a5ecae0bfeaf7da4ddfc7007e3d054824. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:33:13Z), 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/CALVP2552849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8374598b4e961dd9245e0704340a6c7a484e62bbe26a3888387d6fac8c76c9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:12Z), 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/CALVP2552850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfd7c9690faaee0cadef3e3a501208e87dc209f4d14bdff5985a507ff0ecf67. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:10:36Z), 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/CALVP2552851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e69e1fe76b1fe65dee5fb295f752604a66432be1c6532484cace84e802feaf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CALVP2543007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64af41eeaf8ab713e924c895a34ca421fc985fc7f932f19f7e2739e0d6c1c882. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:42:34Z), 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/CBEYJ2568172.