220px|thumb|Clubroot on cauliflower Clubroot is a common disease of cabbages, canola, broccoli, cauliflower, Brussels sprouts, radishes, turnips, stocks, wallflowers and other plants of the family Bra
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 0xbb1c08fc33f23e72c563c48f8ea921860924560eaafa133aad0d2b6c3f2aca79. 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/1d5af6df-bbd4-466f-809e-65589f6d556e.json and https://artists.proofprofile.net/proofs/artist/1d5af6df-bbd4-466f-809e-65589f6d556e.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 0x237c36f493254245adf2227983d722530f337acd12c2501c59e4d72b1a0b63af. 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/GBTE51200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53db836c91804ec06c6721111a4cf59e84b38c12a4dd8ff63244a1311eaed0e. 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/GBTE51200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed30a0daa5d1dfe34a1a4e2742d9297cc6a55a5697488db9851ccbf3e9702f4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US3CS1200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28ff75443e1ceedded79c60cb1750340948fe3babdd993cba603f8ab3afded4. 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/US3CS1200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d58cf2ca68a1ab7b2366ba39a2862fb4e1fdf046566cafea1b6c28c748e0ba4. 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/US3CS1200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a8c40960a03c76c74063a56032cb118e2a4e83235b23e830b2b59c903742f5. 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/US3CS1200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf751c107278b187002cf5f0fb49e8cdb426e4f63df0ed3b57b72be37a80c1e13. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:57Z), 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/US3CS1200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61c18b100337be23bff6b67c6c51bbd477b4c6d1eb045e8dba5875b1b9c4696. 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/US3CS1200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34db7c81b315db447c70859164d630b34d13fd14677d56b02b07f90a9223cf63. 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/US3CS1200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f4c19cb9d7132dbbae44da82485dd42e6c3d894d11ab2456ce4d90295db8ae. 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/US3CS1200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e45d4cd2a783e460cd9b1c0e08583e81405623f7591980e2820b69d4528dd6. 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/US3CS1200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc043374ce7b4f0646803a7cdbffb387d22eba2146df569caf25a3206af414cf9. 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/US3CS0900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbde8296852f420a53b1b9eeee5bcda9ffe12a74b6a26daa98697328239b561. 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/US3CS0900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcd07529eeaf1b7d8b10710149731edf843089c2f8ea407c50d6c65782bf51c. 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/US3CS0900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937fd29cd742877954889adbeade874b5f7c2649a24c5fed0fc9bc1bbc81f5ca. 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/US3CS0900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4a7e64766fc09063d9ee8ad63ca86848136097dd6f3e1a6f0182756d42f52e. 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/US3CS0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3af8678409ccabd8004cb14b3d156e6a3b67df968a0a1c3a7fcde09bf04df22. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:48:33Z), 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/US3CS0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583dcb87af5ab9713e3d2108644132d523977b0a0fae2ec35f992305cd864f76. 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/US3CS0900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e55824a7e8f7ff2f48d1576c84116b128999281567c927200c5838ba30928e. 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/US3CS0900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765d0c24ea14b4f92bbb13a6081f58251dbf8af4ee2e0093ee2ec15365c75c7a. 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/US3CS0900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26cb159afb2e30498414c51d6e63bdcb49990a85e7cfa09ab91415fb50e43cb. 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/US3CS0900119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b97eacc3d14ad47f71c9bb1e3b4a2514ef5efca38040e4dc0e992a83e57911. 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/US3CS0900121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e2700691d9c9ba60f51474dd58a1bdaf5d62f11ccd8b1fa8f4ec3789b1ccac. 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/US3CS0900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e06a48fa1ff71482d50d477f3d28ae90ee5e51f9ad16a280be7fc77191fbf8. 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/US3CS0900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9941794ad10d2fc77c4f7b0ff2c8c4437edf94cee79827570d695dfad7c13b. 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/US3CS0900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0d0c7f4ea1fb9f919d417115aba882a2e84fc7349f56d9cbd9e6f6b5c8ca3d. 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/US3CS0900110.