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 0x55c43a13a5f4ea0ba9a3065eec1a0cb9d692bbde1b35000594644eac9381160a. 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/6bb118c0-0329-4f20-a52f-b4ed8fcafdc9.json and https://artists.proofprofile.net/proofs/artist/6bb118c0-0329-4f20-a52f-b4ed8fcafdc9.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 0xa36f5f2726bc68d2b00a9ccebbd88adf55fac2294d0d31fae86dc947231dcc72. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:02Z), 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/USCGJ1678991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5390d11de569ca44c5c8a9c1db03416dd51a4da78bd11d587f2d76d291267130. 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/USCGJ1846344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fa60ba334fae454a0c8a1e7c96fc475d5ad2fb3299aacfb2e54a7b0c987e66. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SE6HN1925254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd133a564fa1d089c989702b28024d47a6c322a3881bab109ae319b554601e37. 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/QZ93L2034008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e8d035c383a5459ee4f28af9e4debae9db3885e67bb5ed1f811a57e780fbbf. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:35:25Z), 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/QZ93L2002971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06779ef6b4811eba686c84d1af94c5126042f3112ae8f5d6267ceb881664027c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWR2293779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca176a80d68be05dd6a6a2b58b2dfe0d361bdc2a704ff45d73f2ed725d1de91a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN82160017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df0f88d21bfb65d32915a2baa25ae1c498589228b21f61ee2f4b807649eb368. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GBRKQ2330659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430be744b240c0ef1e99e8028ffdbf80f0c68c4b0294f9135f9a07cdcd261b7b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBWUL2353083.