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 0xd6bc525bdbc4328f4bc206b34051104703671a9286ffacd4c9782d4c3b780a3a. 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/181378ea-a794-4d0b-b49b-0b745c57b5f3.json and https://artists.proofprofile.net/proofs/artist/181378ea-a794-4d0b-b49b-0b745c57b5f3.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 0x8e3bf12c6b3e0ad06ce09e10cbb57407a4db1753696165824d203823bbb44a98. 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/QZR8F2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16373c24de4fa485724ddc1d678752b322287a0a5aa0fec6ade9ee4899b4c5f2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZR8F2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb91a7f22fdcd24310586a133042fc0fbcfa15260f533a8cc05b0d96b60775e6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM24S2302187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43e6d7cacd756b7facac1045dc6ef233592c2021293ffbf4083a171f035aa24. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZR8F2100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d926aee7115ee1834a99b2e43640d9dd221a858ee58c4e99c7b3a46bc5b3778. 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/TCAIG2437659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe8d208748b4933b30445e7c70cd8bfc9bbef4c60019c3dd112f5b2fba5ed0c. 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/TCAIL2445949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6836ae525b4df714b0141e9e5a823b81869029f209336a21a9f936db3e539cae. 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/QT2VB2456465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab939b3cf7e460246933814e1e69c5dda249bec05f5ee4e3a4c3a526c59faa1b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QM24S2501088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaa9aad6df42f36f643f73ba8e17cda958b9fd4f052a9e4166c4e7cc9d134a7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM24S2501541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408be52599a9231130d3633b3350d6cc34daee37b54df670e8c586ac7d29e92b. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QM24S2502024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed435520e62d10cf52e4087ac65d4e96de8cc0fabf5afcb9a706b71f3bb18ac9. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QM24S2502203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e7be01fb9059e2b5ec051d9630c87fd6efd522199b801a1e23ad3b6588c29c. 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/QM24S2502517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b153f7b0e1096e80257c3fad4aed9751e3e7d20d4fe9b3a5b7e261a49c30aab. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM24S2502903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7a9cd843fd9a80e48c280bdca1a503052ac7d991f025e15f98ad3163cec193. 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/QM24S2503335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc505f8a0fdce910a4920c0c25ba1a7bc8c8fba7630c3b5f563f5787d626501c. 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/QM24S2400763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec8e43c46dc989164901d100c601b096ba6bd1f9d3cb41d2fc0564743551cd3. 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/QZTAY2393003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daaf2f7b01baab30c4befcb66dcff84c27476ded788ae5939f66e578536edf4. 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/QMTND2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02405a4d91f208c8dc865c3aff571dc7893343927f59455387221c22ea072de4. 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/QMTND2300328.