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 0x7a3906336c34f7e4fbdbb79502132645a177bb0525a7dc9bb11e695e64c9affe. 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/a52d6360-da84-444f-b2b7-cf9c99fb0e89.json and https://artists.proofprofile.net/proofs/artist/a52d6360-da84-444f-b2b7-cf9c99fb0e89.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 0x2902c93c5b4f6440c09b92b9018d71e813e6121c142de8cc3446b2351231c9e0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USLF11400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e956a936dace7c09cf6454dc8859f0eb552cc04994eabe8668aecb0163d4d0. 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/USLF11400906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c1c42e22d211d3a0f70a49e0bdd5355df23c17b9640d4e1fbb2494bd0f4356. 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/JMA271803487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2befe45e1ba6dcf9ff5d1ec0e937a2c3560893fffb13ee86e8de7a0c68de7383. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JMA271803491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241909bfdf08584819aa35967c052321e1df1f260a9b2b5e389eb037df0bae30. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/JMA271803493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8a0c9f40d9e3988cf73b9e9e6eaca0fdd818145c3479f9d71715aa6119490e. 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/USHM22061716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409eb633abd232f62e387d1a2a2c705dd3022d1ed30363d80ec4ba5d7c8ddbd1. 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/QZHN62243957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659d557b0ed7160868e1df26eb9c071a6df7b771097dea33c5caa07e05a27668. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/QZPLS2293860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04d3f95ff7aec4dd492d7b9559237bcaef739e951e1951f58603489d8903613. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:49Z), 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/QM4TW2477389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ecc43cde1fc0b3ce0a0da3c485df3116bce04ea766b4258c70a51cba20a3eb. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZES62491333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2990be59e52b45f462882bcba1fa039ebe3a4f4d14293a794f9761fb045861c1. 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/QZPYN2474343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe13150555b2831f629b2887151fa28528b843d5220a27351c75364a1b30068a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USFHW1300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1665498e0efd720984564df303dfff52b2f9afffe80014d7c0949ab88a002858. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JMA271455747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb645e53af7b32c97edf2bc81833bc060ffc7d93b79d25ea57d06032a7a9357fe. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USFA92400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b80df57579968f4f31beeae31128deec38b3c5e6bf5890eba247af7ca0563b. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:51:08Z), 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/DERX62200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241cb1fc3e40be62c6b7d0c1fafffa843f078a3181353f77d80177919f04cd1f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DERX62401101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50424a0b3eddfaee8dfbc6b17454ce9f849fc583218640dcaf93dab49db3457. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4TW2476933.
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