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 0xf54396d885f0911bd11d901f7d28ef88f4dc3e8fb8287bed609e512b30eb2c38. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55f5846f-43dc-4e8b-8cdd-e96cb574ffa7.json and https://artists.proofprofile.net/proofs/artist/55f5846f-43dc-4e8b-8cdd-e96cb574ffa7.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 0xdb51f3c329d4ffc51d3ccfff032cc639194d294a7bea882b9385df5d369e9a81. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZK6K2164141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18c4bc7c177530d8f8fc8ebcf93c486d38eadf228e0566238783c8263731d98. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZK6K2164142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631003c85e17d5a5c505a54a45781dd5b7e00a4181bc8d19184c8f09e5013ebf. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZK6K2164143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60165937f46a09b0dad8d34c23042efbf7e9d10293ab7891e9b1b51af7f3ee9c. 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/QZDA42449179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcb13a0f0e258c3a84ef031c29b879408f44b74e288d6f60d9ccb41f04eb933. 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/QZTAX2341349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceba4bd609567eec2f0514bac3ac68808ce5304dc159235c860da8e1a80be52. 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/QZK6N2073623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd918158a1ac385cd4dca7184140acebedf7d717c4608d05a87d12f1f914006. 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/QZK6M1908684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bef341a71b749f330f1fa8dd4eba51fb4bac01b0badff951a0ad29d9af7f9b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHN82040736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edd2c510def349d83bae9267ebc08654ebdbc5e018579cb6c8bfe42d0742394. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHN82040737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27375c6217a7262ade6558d2ca8c745c229036cf0837b8b6ac132b4da72bf8c6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZHN82040738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebc6da3ef6f7b8cf63b62bfc403182969953c046b257680c93f59ebbe03abc3. 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/QZHN82040741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabc170dd7c180ccbd32634266185c6d6b6d56cdd055c351c8cd5028b2c188e9. 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/QZHN82040742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac735699ed34c2a8fb6acaccb8873fcb76c69079b3a00336e6443ceab5953eea. 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/QZHN82040744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b2d7f3a88f533c0ad734ef83276da8987c8a40501453d96abc436152529d8d. 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/QZHN82040749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0623ed1604412bd36f65d8ad135c2641079ac999b3ad9336b403433959612a. 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/QZHN82040752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cd931d8429968dc8599df3b9dc2e28f80825bc0c14f0d921ecf6d9d88bacb7. 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/QZHN82178466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c49a1626f779ccc650f1d2c61cb3e66dd997f99af6d02c16108a834a13f566. 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/QZES82202837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b2adeaab8e71abe2146de4ab8bd3559a961220aa0820228c16e189f04a7398. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZTAS2475293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19fe32a6806f7aeb1f534d24f86ffc07d06f5d9ca3a4214f84c45ef764161bf. 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/QZRP42127041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b7b9deca9a32572cebe807c86f755665e7ccccfed16bdeb4bba7a4040471c9. 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/QZNWZ2023114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe987df36c047b68d599f95d1f568ad58d78e29ddea17a65b2fb2caa0ee1d1b5b. 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/QZMEP2175230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e97485dd23c03d18b05db3c3851b42f98296d1acc6d549346181965d3fbf4f. 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/QZFZ62079687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a094ca8f11afa47b728dc35f9c80f45fdd4756fa88f9fd22cea11cee1e2107. 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/QZDA72143867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345cf94528021b8c7d0a39252915b5af288978e7ef34591bacbdbd25bad72eea. 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/QZMER2191853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1e7b0a0fff28e3b4e76824e697908f9640c382ad97a86f7284db2c178b2311. 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/QZDA52211682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388781b460d881a43cb1790567f8cdfbf03844ec052f43c79f4aa78a2aec9925. 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/QZFZ22504493.