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 0xb5b198dd0453834bedf24816ebc06606091811bf6dbcb78edd76e3eda97b4c83. 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/e611e409-ae66-4b57-a8d5-53feabfdb8de.json and https://artists.proofprofile.net/proofs/artist/e611e409-ae66-4b57-a8d5-53feabfdb8de.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 0xd3083221ebe753c7950cd49c54e4c54458f9cbc95f7c805ac87dee9e1d0a4287. 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/GBLV62132861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc81a7e6acde078bb0341d4c46d300e37f91eee9af8fd8e3725aa00be715a42. 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/GBLV62102569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d7e19f90c51f1cd9fb9bf9e2aa5ba6db37bd5ecfffd08b918e93aab45ea47f. 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/GBKQU2262174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555fa8ae0e15e81b05265848cf6dc09d9ae4c797383276736148c179ca57df2b. 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/GBLV62212065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10235f96b6da79994b3ab5f512ce1d90bea0696bf24d485e7f1fd88e94a3a77. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2221929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0165a2d76703cd6093f4360849b576c01d374a2da6fd4eab2355a106e10c2c6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBKQU2251340.
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 0x0a96fccf2ddcfd96ec59212bb0d683decd9f2101214c3619e0ce42af57a3af38. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBKQU2244077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430b3753c8d2952ef57c20c5b42717b7a89191095a291c29175c25802912759c. 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/GBLV62104815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e65bf8507f0d4ede15f9cb7b17a522b4219af9ebd037d818315f49bc92586a4. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBKQU2209606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe273154c74c125f34f5bef4d4c2e54f82bc3a8f870a92c92857535bd0ddd6390. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKQU2309512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81df6175467b112c14e7f0c4145df73825aae60cbad143c5163ea29b2413c277. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBLV62117810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fb12d233ec7eca1dab65d875df2a3b42950affcedcff2c66021fe23a7603f5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBKQU2301994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638506ef5e5de0f6db40240a4e474e8a20e0e80e76cd9b564c8311e12acecaee. 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/UKACT1718989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0c93ff5f370b6c913e852627df3257cbe1468b9a67856c8929e8032ba9c1b2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UKACT1718987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ce1f7708aae7ace55897f8b73ec67803f521b1c2b067a3d6e1978b2b5ad229. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/UKACT1718988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a1160340cc58b6d574de1b3af5862a9e0be8c69491a3c30f2f7fab979fc38b. 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/GBLV62312459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52059b5ddf0beecda5e7c535e7457c96786d582c26ee461561c5facf16ac5bec. 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/GBLV62312458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192253418ae5297ef2bb222e65bcc82d3543f3e453c871843fe95708b9572a4b. 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/GBLV62309591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9649158d843809cbd9d1d76a243a46089c005c65a397384f1ff3a56ada9db301. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLV62311810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39b2cd329cd86ed5961438cf1a70981e9c524875472e60b5d8a5e93d1a187d9. 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/GBLV62304823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c291cb382b1ab2e481dc309cdc416e1314746defa2c77db0e98510f18e7c84. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBLV62310464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9813036d89dd4a42aa5173576546e711021dd20cdd4b923556bc6e4bc3ae491b. 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/GBKQU2395831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26b9a48277b3de3d858e69da8f0af952eaf5518033c17acbaf5861fec01c9e1. 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/US83Z2348508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b25ba111f4a6cdb2d93a4f099d07daa6aadf5ee8092139767623867ba9b088. 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/GBKQU2395378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dd62ea0795302b5fdca963e7c89935a58ce6c36ed22d930ba7534c44d538e8. 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/GBKQU2387238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bb6d522ebda726750e28c607cda6c4b07c472331e5ce74d1bac8a523d65676. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBKQU2378245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f5a81f3373ef4350d64f7a18de974c399eb0a469f8362ae45cabc24d9789ca. 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/GBKQU2363553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd2e16b37d86aa019902ade7237f589749c2b91b8f577e17e1362cab3e8ee4d. 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/GBKQU2357940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaca57fcaeb3a1701070c1e13518d4b936323f067c9fbcd1b1d4326fac2eaeda. 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/GBKW42300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d8ba35f1c71d7dd1cb3635c4ef6e908de4d1bd80e595b9369e51daaa17649f. 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/GBKW42300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bde9ddacad0ade0c680835bc434d73d3afb4ae4942d127879a02f6a9ef347b. 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/GBKW42300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb143e5d2e90a4c77274aaf7d6e4c46b1c16fe55ee2a0e4465de7b0991f2ddc. 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/US83Z2325016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd59e8b2833aae927d7ed1448ad6e40ac8d33c90004bd9d33b2433f64bfade21. 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/US83Z2314206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368defe05291a96fc803b1e45e0d8127f5218e50c6a6e5d2a8c6baba551d4f03. 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/US83Z2325013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7b27c1977dbf91ee9eaf3dbb42a1c0534d6b59f8fba9f5b9f8b7a6c153de96. 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/US83Z2242431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3db125a7ea6c7d271f6b5526ac9e9730e3ca69657cd8d9238a8cdd4d7a5af4. 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/GBSCL1755033.