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 0x45e9f94d1f0737936131926baede98dff3475c4d63d09e8c5fbd660ee5db2466. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/955921d6-4512-457a-8c1b-bb0e6e58011d.json and https://artists.proofprofile.net/proofs/artist/955921d6-4512-457a-8c1b-bb0e6e58011d.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 0x1ecd2ab5d765d97f21dea8bf17d3d91824a12f997b090bc9627929453261ab7a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:06:31Z), 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/QZZ7L2512277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db46cf0b06d15c83f17ab2e5bf5353ff8f081b031561079b518afc39c158469. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:55:55Z), 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/QZZ7L2571024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf535bf0f542543354b12d95a516e1d8c33bf78ce1ac4f6a92a5da7e4cb6dbcf8. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:37:56Z), 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/QZZ7M2544223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7f0517a5c493564841821595b8efa7793fa0795f5b9ec7038ae63e6f4e7650. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:18:57Z), 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/QZZ7L2568194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1362f2d2eeecd9b8041d43063053f364d3908b44bd92455994cbdf3f4c83b53e. 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/QZZ7M2532191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f92f0ebbef034ea182d11a60629c5b4e8214572140962b984846967be08523f. 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/QZZ7Q2551049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b275b1456a140240db4977311c718ec0c6010839b22a5203df12ef951a2c06. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7P2577244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5473d22b5165f684e4b30996bcf6ca86d2bbdf926310a7004504d4f5f79287. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:22:41Z), 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/QZZ7X2505801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785242d5ca366a65d4372a36f3035ff4ce11d6f0930dcadf5992cc807e56ca67. 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/QZZ7X2517830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea8023742293f65f07ea7039f39fc280b97af00f9c977548c5d7df13d6ab851. 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/QZZ7W2598767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241b04e1953b3bd483231274fa8037c55a2188cb297ee618cf348e54f9ae894. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:47:31Z), 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/QZZ7W2596263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ff08e6949e77f118dec1982fb61c0c6907154a5e830c4e625c446f9877893c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QT3F52584544.