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 0xa2fedaacf2cb572b918fc0dc93ba9258309d14e9c7541480675bb5aef14d7a76. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/590ef005-6e93-4e5c-a274-52b45f9fd352.json and https://artists.proofprofile.net/proofs/artist/590ef005-6e93-4e5c-a274-52b45f9fd352.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 0xc226f4c527aabd4afdc305fdff843b159eb6fce84eedd0f658b4e68495d50308. 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/ING111030942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288f788fe2bb653b2081803a31dd879d01b52aa8ce04a823bf7ea6ec145e5609. 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/INS920510464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc163f93380173ffa7fd770bf64a85999c8cecc10d031cadd67c9f174673a02b6. 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/INS920510466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7b809af29ec42b3e4980677f9f73b4c1afd51148878f179a66248e604bdc9b. 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/INS920510467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe829f5a0f8724a80dcf3d7231e78e5197535413a53e0800f8fc872f2d941b825. 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/INS920510469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf262e5e5cc496c459c5b5d7793f4ec1ca9fc342d6547e6d4f995b4c55caef0bb. 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/INS920510470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa6a566f3052c59b55ba755d755239fb11ccd391976c50fd775958cf99813b6. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/INS920510468.
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 0x603b39cfa8068036a9150b770f33cf39f9d9c49bd888f69d5e66b2fc2af9eeff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INS231418344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04918f4f367d97dccfcd30039747ed6ef4f61a56e8ca232a1786cd6fdaf9da49. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INS231418343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840e058b6f6c692d1190a41f427f3e3d435e9ec8509886f350b4aed1ba09cb93. 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/INS231418342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45c3c4ac244652cf0547dae19c59276f9af4c5387dbe26063ee3881e80b6267. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/INS231418341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f80ca63cd55e59beada8eae218753d2a836e969720fd02c063f3fa63f796b5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INS231418340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df5a7808ad56f340f33b8e80bfe87316b35db5d2654363bd7d124bd5c3a5721. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/INS231418347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d12a473da8c7fa8a084aba887df49fe36e5f88ec4718eda925001dc1c113a27. 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/INS920510701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc71b78f4f17d8cd296e55f57f4b1c082578f9d64b7848d2fdbc43ae2516de3. 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/ING111030638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a7763a7934dfd9705ce94998888e711706fd831711919cb97a808539fa2f05. 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/ING111030640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a721a13ac7142417ed983b5c5fa5d6341ebff42dd48ead53a12279f589b35c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ING111030642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200cfeebd7895886c449a2162860702af3ff1914e059ab994c5af4a5a8f1938d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ING111030643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8d18ba82b880aa7d7c52cc6d8c71e661ce3ef859b94591f357c859454fa6d3. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ING111030641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d088b6ccd00e7abac957a30e342196ec7cc59c5660c6044077b812afc91067. 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/INS231541687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f89a33bec542021c1edd332b4aa451ad7472767ba32cf6f55e84cce384c7a16. 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/INS231502191.