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 0x7cb3f5a172f5756af604128ff98b8613d35e86387924d343a67dd24dfd8fd480. 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/8f38eb5e-dcf4-48e4-836a-bba05b57d6a9.json and https://artists.proofprofile.net/proofs/artist/8f38eb5e-dcf4-48e4-836a-bba05b57d6a9.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 0xeb85e1e8fe890db8e02413c556824d8d0e03fb6b3573e17e8dfaabf009c0f61e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYY2086381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5996ee63f805e574745f90254a5949396ffeaea667750dcb38c60d55f3e80df. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZFYX2056265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad309c505753a71217e035e05f572bbe4bc8941548a4557a4e15998a1f02408. 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/QZFZ72005964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab21bfad22ab31ac265f4bc617884356012d8c0ca3bdbbdbc0130e70adceef2b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ72005966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d400a76aab0757c67aa5a7c7b424d47bae198be9fa2072de32a8fb82564dab9. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:45:55Z), 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/QZHN72068618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6f581ad52df7b07f4d0685c22e71082dd473aeb36daa4e65481cd20d226b10. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:47:43Z), 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/QZHN42407455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98fa7f741a394d2058e962643d3cf6ca5fa68e6edbf9c78bd68d42f4444aee2. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZFYY2580449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c46ed82808aae5fe878c020b72204340b4212d8745ad9db427e3fde97b7c3e1. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZFYY2581885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124c7c6e29384449350c859a1377fbddbed71654b117e9287fea149c73430abf. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:33:35Z), 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/QZFYY2582935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cc0e6505c0ac4c0f678911fc3ad3e27a93bf105caea160c37162b97fa70762. 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/QZFYZ2502237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f7f185940700ca4330ac46465ed12aa5eb545ed14a05fd85961a6bd7760ed4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYZ2506686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58290872166937ce64c9472ad8fce3d7f49c298ca34d9d845561ab0ce7a906e. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZFYZ2504226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefcb91d604cda376831178cf8ee889650c00837a57654cb37b3d84d09493118. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZFYZ2504246.