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 0x9021740e03ce92d018829c64a69ee391607aad2dbc4aa32d459e40120d74a213. 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/4f9a215c-1437-4a39-809e-e5b9baffd8e2.json and https://artists.proofprofile.net/proofs/artist/4f9a215c-1437-4a39-809e-e5b9baffd8e2.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 0x036319d15c6d795d730f3b4c00a915f8506138482d3a62178cec901990b4369e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFZ32517963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03962883e98a0c6d2fa5a82fb238cfd23839de8f76672edb58ed48e2d2f387f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ62592378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02074f2891b22b5aa2e635d0e410239093419097183f4102a666792a69907989. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:57:24Z), 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/QZDA62529251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe494c0c6260d9910e194dd25c73f5deab2d8c10e007c66fc10bddd413aec767. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZES92566149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995a9eca0ce0d9f2d257fb69a06e2eb844264484138724352cf9e20717e8b026. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHN92516413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf904450fc4585d3e407d673f7d7e29e970556ac870b04abf91f7c73ed4b6c7a7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN92516414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbf3902ba69a3c67df622d6c9f339674a289ad7260a6c39e18384c08ad32aec. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:54Z), 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/QZHN92516415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c80e2455aa642a2ffc04fd6a4942859d26ef4c47dcb25a34522ff30746f64e2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN92516416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ea7cef37bd71139ed679264a787f5399f64c8411fc5f1b2b22875572355047. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN92516417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb0177a31c694f7ea308cf8168a15d7ae1a77ab3a670248823a4e2d5466c564. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZHN92516418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedd86d653b81fb64705771a4f56c869f0654a0d0c05c454262ccfabe490fbf0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN92516419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbabea756b11876ad2bc9c4b97800aba277a7aa9e47a6e40d6cd9eeade129d9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES92568644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a77f75020ecae537e6913dbf80270fd1645ffbba99267dbd80c53681f682b36. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN92514755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e729ca5ca7ace007ace4cd37928db563786956a4700090dc8fad0e6195b49b5. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZK6F2542419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7d963c52b6e32618d53103129e5a9750f7bfd123cefdd77d443effc38cf94c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZK6F2542421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa056c4bbe765573966af4c4796a0a6537dd13aa65a71d3d2870b032839ca16e3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:55:01Z), 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/QZTBA2514885.