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 0x76ab10de13ff69e74faba095dd8ca8224970eaeaaa35db7a9cd6cec8849cf4e1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0eac5e1c-bdd2-455b-a300-d58084460c83.json and https://artists.proofprofile.net/proofs/artist/0eac5e1c-bdd2-455b-a300-d58084460c83.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 0x960296fa76e3db8a16137bb98513d726801c94e484ddca538046b11ee40adc44. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:11Z), 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/QZB4J1823386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af20fb93162a7f8ae20cc2ac61d5f712ab885a6acef4eb20677c49024628bda. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:45:58Z), 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/QZES51862638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4057207a92bf9f95d1de944e7e59b5fa778573e31423ea2a8ab1442da4acc88. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:02:44Z), 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/QZ8LD1989367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9907423fb25dd068044a2ccd0479af521c9a412346e706ed5a8375c19142f3b1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZMEN2006383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd321e662864b3f27636cafc4696d2992232aba97ac045e8a4296693861d5373c. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZES82135720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1066a4902aeb61cac25c0b63dad7b95ab2af56c7a13f9d5e3c929e366fd7d500. 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/QZHN52117719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8f7585214f3b755f0c20ac56aae72edd1f209b2a82bc91433a337d22415cd6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6Q2199381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1871239ad7aac95af959b2efb7d8273c74d6f809d94eaf6d3347164a09f42f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZK6H2138992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc413ecd90609965192a622f69d1d4e1ef54c7b6c2a46b764500290de0a3ba03a. 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/QZNWU2164781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc036306239261109fb3ce7cfad0fe38bad10d13580c0e3722d4a881297f3c770. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZFZ72325033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211afab8c37e30b031e90b8620a77a7066bf1be3aaa58efba3ae2c758ec86569. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAW2378748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008baaaa9b9c49fa69c02bf6bbc0a634eeba3f58ed5fb362372b0faaa1fe4544. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZTB32370295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3748db333c98be25627cf4a6f3276d3925225672bf2eee84dc392d765f0b58. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:39Z), 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/QZK6K2412057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4440d77c1a60294b2a072d2a393518882377e6c9f8b1875b02c6f3acb151d812. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZWFF2428864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6945e843b9d8d31f45c7c4039f5dc45c7fa52fa043c6aeaeab8ebe3abe569b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR1966950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3779bb026a52bfb5e73f830f0eea687d5b139a8b4312f29eff1997204fd56f24. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZMHN2098137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8968daf84a3883d2728b166c7a9008f5e9abcf89554abeb005c51b1583e7b8. 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/QZZ8A2339572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51b7da5392c41b926d27e8ee57de695dc7b8f853e7c9906b1fa59c93b0276da. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZ5FN1966780.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch