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 0x9855a33d2db434951da306a2dfc6531aec1ce56897b8da13effa589a3022fe0f. 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/40928cb4-a382-426a-8f53-96c8cc881c4f.json and https://artists.proofprofile.net/proofs/artist/40928cb4-a382-426a-8f53-96c8cc881c4f.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 0x4705592fc9a3a1ad7eb9a7fe8b224c320076e71cbbc183c1fcfa9c9a3d03c149. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:00:26Z), 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/US3DF2129561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637c4f58f174aa3347b77808033fa32396d05845afbcb3f3c0a3a378f90b11c8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF2129562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2226240216b2fd51557d1490bddfed4e7a1c470bd4e7faefa5a6e6e4e662ae. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US3DF2129563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11eacf42cfd00e1885b5ca4a42ca6382026634eeb7e2cef08341756aa6736835. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDQH2257716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895d9c1e77c89cfe1c6dc960ab9bb49ec5611dd82cf46a013a9665ef85d48b9c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2417257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c07c46a8d9ee709a9996e4af7e04b3a1b4e315c5729c1016e7308ed5c0b2ea. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USA2P2417260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0756fa3122d748007ee8df9f301a8ae8f5f21ec0fdaffb5519bea5c411874e. 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/USA2P2448834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd646f3743c92247f60a3c808b0b0ff9ba58c6325d9c29f7cf1eef3080349bcf. 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/USA2P2463667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3fb98bacc3a08ea72edafa17ac353e1796b1fd3d12e91b9c28ba02b412f075. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2512358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf231a95c47e7e888d29447113488f08b5656bdb26a9ca3a45b3edc43d219d5ea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXUM62300507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee0f20463b335e1b9339368ec8c959e8f9c5101b890f7789f0e6c737941b113. 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/USUM72208208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf231a95c47e7e888d29447113488f08b5656bdb26a9ca3a45b3edc43d219d5ea. 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/MXUM62300507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d18156873ae41453c588232636e7a97ed6ed05dbdca784d3dac242ce5e1fa9a. 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/USUM72120433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576b77663909a1bc5b89fdcdf65711ba4d6eeb9e8553392d65a0cb27d4d220a6. 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/USA2P2474514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f48efdd0a43d9cbd7369507beab26bdfe9b05cee4192e19b917eb613e2bc44e. 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/QZQMB2104446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf231a95c47e7e888d29447113488f08b5656bdb26a9ca3a45b3edc43d219d5ea. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/MXUM62300507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576b77663909a1bc5b89fdcdf65711ba4d6eeb9e8553392d65a0cb27d4d220a6. 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/USA2P2474514.