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 0x18760a99504281ce9d224bf1762f4675e8b13f8d45fdc9e22fc03d6b9cf84850. 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/e91b92df-e903-4069-af12-e6cf6a30959e.json and https://artists.proofprofile.net/proofs/artist/e91b92df-e903-4069-af12-e6cf6a30959e.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 0xd2ac3b549ab74a09980777d4eeecfd3d52fc062d6dbf05a24617f89524875a8b. 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/QM6P42306073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd97f716658b4a34c5390a3a97b52ec6296edd3dcc24d5405df133db91def5cb. 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/QM4TW2432911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2a29fb70eed36ddb5563de544e41359ef33607a6c029cd01cbd2b9d00848d1. 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/QM6MZ2420439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0df59928326060f28f50ece255112e5bd531fb505dc457e18f6df080449db8. 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/QMDA62424933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c02bed00e8ee89c095161202ea83613f1be265dc2f62c327c09a1c83a6667d9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/COA6W2300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba3acd1d9b76fd3fa2bf75f05214b3843b1bf294e378dcde4e2d90d4867a602. 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/ZZOPM2239723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28c318aae854579f979bcc5374bb4a39d187d3f12486fb43c75e4e1d33947d1. 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/QZNJZ2122004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6539e17b6d0a4697234326f750b6bed85689b1799cf899f5f97b60565bd6e7. 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/QZ5AB2151031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d55bd63184bcb5476e1a6256e050d4d0e25a4ebdea3108f4a3dda354f89fea. 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/QZHZ32185032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39a01c6b87513bdab03c59ab9a9965990c1a0bfa933c5030b0c7d1b84aa73eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJX2161092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188a3de3fd3c4a0c29606093850f03d373ab062a8e4aed441479bd4c212e1364. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJZ2122005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a121a0c456adf454c70db7c6199e4c1332530932da0e3d086f163fc949bf3f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJZ2122006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1ab2b6df27ff1374666d75bccaba74720333cc7da19a01e1b8a23b70bd17a2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJZ2122007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305a2f5cafa39b187f18fb1c1e1abd951a34e53e4b45cd367dd5836ec6f444fd. 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/QZNJZ2122008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cee4ff2bee00c5c954b1dbca8e5efb01386a7161eef9238d64bf628a9799c4. 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/QZNJZ2122009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39a01c6b87513bdab03c59ab9a9965990c1a0bfa933c5030b0c7d1b84aa73eb. 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/QZNJX2161092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d55bd63184bcb5476e1a6256e050d4d0e25a4ebdea3108f4a3dda354f89fea. 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/QZHZ32185032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a994e4dc34a24dafbf9fba407ae6ae65acc192567340915265399621e4ab10. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHZ62079051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d952109769859369015898be2981317c95e0ea938fa9abb886dc38d73e17de6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/COSO12400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4c7d7d9160905d3ab3b6b7561b6b591db0d8ca8b3fc6c3c4bfd11659c45093. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/COSO12200162.