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 0x9fd715427b13de1206b7c851265919cd383578be5b54d9d9adc95def2fd6a2a7. 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/8e656d93-4fcf-450d-9664-f6203bda9563.json and https://artists.proofprofile.net/proofs/artist/8e656d93-4fcf-450d-9664-f6203bda9563.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 0x3e475e193ce7d67cc21b52dc30dbb3fa5eea202b469754ff51cba347e8455ba4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:17Z), 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/ES71G1837142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2dcf0852a87bb4167385cb0adfc099a18b6817da58d4b3b515e16d840e6d33. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/ES71G1944863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dda6ba38772fbfac531d18ea617e6b091fa7b456365503ac0f5eb518e3e5623. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/ES71G2134234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d9e1ef42995244bda9511960c78cb4ecfa15c5856803b3ee77f2caa58ecf30. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:10:21Z), 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/ES71G2239494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924212a9ae0c13d5824c1236fc1c77a026bed0fd9ff26c2e53ac4b23959ace48. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ES71G2317309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff528af39190efa161a02bff12307f005011fa1afbc3c3754ccb3de4044a8139. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:48:44Z), 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/PT7UO2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33647d9a4add04c017b6443a9cfa52dd74e99177c849fce1408c15bfe1d4f23. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:42Z), 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/PT7UO2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7c233b80e042c55e3c6c13b6da349e209e1ebdecdedf8e5a886969105198c5. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/PT7UO2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01a647135e8b4b12410e6b8f425299951b2b4cc4ff7c7683e93bcc80b69bf1f. 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/PTVI12401183.