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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf7ebd5ef3271fdaf0dd0fb152a62ffcb3acdf5d2a225b2fc92cefe59e3d8ab. 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/8a06e068-3eb6-4055-b0a4-c9e2faa4540c.json and https://artists.proofprofile.net/proofs/artist/8a06e068-3eb6-4055-b0a4-c9e2faa4540c.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad85c29bd902a7ca47a1831fb846721c751e746e0cad88f55eface4efbd40ef. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QMFMF1589719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44ab837f99de1b00a56e870951f3484fce5abf5219af9d35bbe3e2b65254488. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMFMF1589724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f1c352988589bb31cea8617d30678bb787c953cff597d096e7491d38dfcdfa. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QMFMF1589718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11443cc6a7ddf6fd752e3533a3b5f6d52e846adb7289b9d6db3986e2db86f4a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QMFMF1589725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0598d9139031294492f4363b21e2b4f2522bbf044e9e10f27c64fed7555a746e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFMF1589722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2868ecdf2f82b1606c5fca9aea8594116a512dff65c4d8588bea0fbd70120350. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMFMF1589727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fe02c3227676112470f4a1f10a98a1c1dc3d0b58c2d76cf4196e173ebe8de9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QMFMF1589723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763766a5058d2753f93a7e18bbd0130e2bd76c89cb30438095b8aa05e90a835f. 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/QMFMF1589717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d20f77ba59a49d90cefe6d41f11604623cc0f4e83d1c69ba33768a603bb904. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QMFMF1589720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89240ddf8e2bd3b28492304807ba5fb7fc473c1047e7920117026180651d0fce. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ARTWQ2000333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba3462a4f32d36af2beae227dfc0dac256cfe18f6a6bf98da78c8e3fff68f11. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARTWQ1301335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0eff23d07e139cda2abe31284d204ca7b74f51208368bae3272514f62d6bf27. 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/ARTWQ1301336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426e2abc88651bda8ca7c55032b15fa65115ad0dbba2a64ff6cfb99ecd729dd4. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ARTWQ1301343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2323dfa22f74a8f9702c6397c60eb5a301147ebb97d6c0f9477b18e37c3ff9d7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ARTWQ1301345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2adc44e03e9017ad697a7dd7100a0a0ff7be2380d76b2f1af43c3384b138b62. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USCGH1820251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564ad62b5c7826ed1577ad55be72256cc75306a1e16f87cc1622b8cfb7375e96. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ARHXW2101795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1273ed2fe97ded43bf69df8590e0f4ea6815dd007eb4845c62cc1d1a1902d2b3. 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/ARHXW2101794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f459f2c7f6b635f8e87eb4a6b65f3be228d23ad3fec78a5fcb734d884490e2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARG101103818.