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 0xf2ad2f2f2dc04467a01dc96e3b5f7003856ddd262d4eb6dc854a4f0207efd900. 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/81acc583-5944-4592-b566-0090be59a3ad.json and https://artists.proofprofile.net/proofs/artist/81acc583-5944-4592-b566-0090be59a3ad.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 0xd891cf600467c5e5dd24be493d6192cfccd26bde17e18cea9248a5578347c1e2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GXD7V2281893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c87e915d4ded0243bfee6546deabbabf6eb466bb11f9310aaa2430d90fa106. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:20:46Z), 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/GXD7V2253944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598f600aff536892717ad8de90743c2d1f9379731ac4bd72aa098bbb2ee333ba. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/CA5KR2487598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f72a80a001e5ec5f9d6870e161de4d1823cb27ec8d3f9320d075b9cf572c20. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKZGC2406206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dd4999dc9118d85ad05a7353da112b144aa970db9e6e8750e33ecfe2fa4c34. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QMDA72454552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86466e51bbc0434f6b352b87399509d3211db64539cfc969238dff7b7db9934. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GXD7V2567857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2287fe554ec74344187202e529ba442710b536a57a24eeb773b70b1596698eab. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/GXD7V2530510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ca988779e5088e185032ab24bc92967109d7295c144cb009aada2b0d07ae0e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXD7V2596235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5533bc124fa2dd67136ffef231bf68fce58e87ae086e1614136f2aaa4b558950. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GXD7V2515482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ca9744a8a7b5fc3093015cf3a02b60560d706a043fc422b7cdc9b86f91b40f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GXD7V2539890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ca4c4c3a1d363e9d5814e4d54ade9d7808b8ffb35ecd6a71bd1293bffc2bc8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:22:23Z), 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/GXD7V2597926.