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 0x382a297b2669973a035600441f7bb888b63a1648f17677cb159620ab1ce86089. 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/da658780-4532-474a-a3b7-154ae74cabc3.json and https://artists.proofprofile.net/proofs/artist/da658780-4532-474a-a3b7-154ae74cabc3.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 0x3d35ee3308864ffca0085c6ea2a88567e89fead50f4a38a063ce9cb6da3bc04f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX5MX2271265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6face75991e2428534e32a90d7b4137c921214e58dc69c38765fd9539daeee3f. 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/GX3HH2336936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cba547e94b1764c4f351578981508839d99fb63779f7ea45e0be454c0572de. 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/GX89G2307837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff32ab8283b39c2edfb20214fb480229dc661c650eec42074ed60b89ce2468d. 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/GX89G2307005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc1ff759646bd7f0b3861f9a860746da1751ab138e82c966f26dc193ee28336. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX8LD2226482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22766f2494e272758968bd2853c85ef0345f7bc29b908e65adf8c100a468dad. 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/GX8KD2282808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ab29eff0b054efdaf5a2c509bb28223f8df4cb183d50b29be6dc8bc53deb0d. 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/GX8KD2243703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91cbb4ffae9c1a8898e5ccb5d0ebe6909fe5fa10b0c4e59cb577791d7c8f276. 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/GX89G2238205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c652e38cfa3916d44d2f3dc8e8b71f0e1c8b648e08a1dfe0f792e132f1df284. 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/GBSMU0126064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c29379baced75214cae997c4209c9492db921b33bf7e330daf294f2b798f584. 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/GX4R52260668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14312f7b7c49f9f4eb6bf63942c2899ecc988c32362d7955c0e8d4bee8820e7b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLLT2158804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc1ff759646bd7f0b3861f9a860746da1751ab138e82c966f26dc193ee28336. 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/GX8LD2226482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cba547e94b1764c4f351578981508839d99fb63779f7ea45e0be454c0572de. 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/GX89G2307837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6face75991e2428534e32a90d7b4137c921214e58dc69c38765fd9539daeee3f. 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/GX3HH2336936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc1ff759646bd7f0b3861f9a860746da1751ab138e82c966f26dc193ee28336. 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/GX8LD2226482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc1ff759646bd7f0b3861f9a860746da1751ab138e82c966f26dc193ee28336. 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/GX8LD2226482.