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 0x2871f484b1b04434f841ed3bf10d9c2b66cb7c8d8df20bb6b9fa16a4da57cb29. 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/fe974d98-ca83-42b3-8366-d8efd1883afb.json and https://artists.proofprofile.net/proofs/artist/fe974d98-ca83-42b3-8366-d8efd1883afb.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 0xde5d379b5dc84531c080f7a7d42ce37347c88f07e03f5dafad3cddf5599d4dc7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTB42369093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ab68e7bffdf516b9557cbe736f21870530efeb203d3cf5f69f93196374a0fe. 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/QZTB42369094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e111b864a866541ec4b401692197026be92b13ac73dabd39e2cfee97ba52ca. 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/QZTB42369095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f93d60a69c2a65672ae2bc3ec53ff585f78d94f9d1ec316f6d7ac7da709de7. 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/QZTB42369096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a9047978db07aeb087d2911e6aba3889224df29bbe8d4a3c4ae905b0ff6e8a. 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/QZTB42369097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa318b07f5762b3acba07c38b5a276141442f1e297d1cccedb213de04e5dd97. 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/QZTB42369098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ea0749e1c7f0c699af984139f34df44e1adcf8db92aaa4e46a5464d389b3c3. 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/QZTB42369099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17df84cd4355bd1147216c6d65611ea3d5cd30cbe65c241265bdf23eb1659706. 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/QZTB42369100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab7c031be2fdab5e9f9ebc51f9c8c5968520a4c86e1370c4ed3f331a9e1d9c1. 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/QZTB42369101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd59e8ff93a9ed7157a6a76cbdcc375c1520d8cf0624fd0e026fc1b0ae89728. 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/QZTB42369102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7095930bfb870eb6ec5b033715482c83f50797629071e31d45c46252dd6f5b. 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/QZTB42369103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8a27dedca2715103b57d162626f462efbe7c4b8ef6b485c9b8c19011695383. 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/QZTB42369104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6355d8bea89ac5267baacc0d01b13a8626c5fa9d7da121a129e623bb234c04d. 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/QZTB42369105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb131a6637ce5f038fc5ce53e70c22ce6e1ac6eaf3e7ef69ab751ba26ac1c26. 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/QZNWY2341731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81b0bcb6efee819ecbae9d263552e5673c58b561fe940da85ebd65e99ef3923. 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/QZMEM2395796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7606568d275dca9e0c1637c250b7d607a8063bbf22649b88093d87cfcc696d86. 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/QZK6F2361759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1463b1ea0abea80ca68dbb3af9ea294ee1248ece87b535ef412e6773ef582a35. 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/QZHNB2319057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d32db06d575a425e46bf0b1ec2495630f60b2a70f943980f3756416afa6b710. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GB8KE2304954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862ce361208c5c862860cab3ba938d68ed5b1aaa54dc0ee853223438529bae37. 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/GB8KE2304956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c3f3e97094ebb72490cd5660e10047481fe278b9af0417ae3fbfec2d03cfb9. 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/QZES92384746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb92f94c781016efc1ff86e9f2fb01c458ae30d21bc15aa9da7c80b0ff41678. 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/QZDA42326323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99657c0493a2816f151857aa2e0bc9a162938aac2f704ed85822cec2d0d5aeb8. 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/QZFYZ2387910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6933a235f5e93b66ca5a15752b4378eb9da9adb8d880311a7817e27cd5ef3d04. 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/QZFZ42274931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf6dda3b49920021cc0dbae4f47596bbc657a475b3e6871275389fa58592b1d. 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/GB8KE2150731.