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 0x95b971d268ef5b6812c7be1fef6aed29c8489c1f79b36ae77376df1040f010af. 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/c3787b11-e31f-454e-a2bb-9c09f07c85c2.json and https://artists.proofprofile.net/proofs/artist/c3787b11-e31f-454e-a2bb-9c09f07c85c2.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 0xc4fccfc0570b04a08e9f63d64c14e150037add65b670261e53753bd86f1bc169. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/FIFMF8700400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c26802e96b75c8b05bbec8b93299e85d99e96d5d9d3e1a3ad7293a2142ed30. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FIFMF8700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700727dc845276b81cd90e109ab56232d5bf60e5b1d6710c62093160e5d0eb7a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIFMF8701300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48167c9957f51e36aac4845a5fb9605dffdae8eeceb34aec523ca4349fad643. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIFMF9300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1eb117b41adffe61a293a7a27adb08d81a280dde274276974f18d8c16f55466. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIFMF9202111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b4c814157f81376af43bd696d2c53f78d8a8c8b7c31ab31dbc033f95fb7964. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/FIFMF9400336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3148ff81e152ebf333a63691d7110dd88abd260829bc554bf8f4c5c2b6b727b7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FIFMF8900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb4d604d6ff7667315d8ac8b744fcca94260679bcde90fe368b91b25cff69dc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FIFMF8900400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120c08a6f22f7b6a838f0ad5bef89f9207884500c041fb9e53ffbea07a4325fe. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FIFMF8800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26935394a262f036c0a0e2ab12e30dfe216170be2780b4cc2e9626611469fb6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FIFMF8800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8f5873f2a9cd2fdcf826f2761bdfc9a904c2e3d07784100aa845e12f584ccc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIFMF8800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423238b8a7a6e843b92288cb00cb639d808fb495fbc5b20e76f5130e191ba6ed. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FIFMF9000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b56bcfdfeec5fd961811096a09622006176dfea4db17e38742d20e61fcc79f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FIFMF9600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177b56e7396cfeebf95b9c75ad0b99b5cb2b30d7accefec229ff908b385db3ba. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FIFMF8601000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b811c19508a8fe40f9796c7704d6b6cbfbf1ac696e21307fe2bc3e10f48d52. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIFMF8800200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad682d5e6c15fdff5733d975a4fc40ccaf1785cee27af1c0bd8e6319f344171e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FIFMF9202102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee82bdbfc12f494ff593453479ada30736e4b73cc353abb7c0e8c20d40548b4e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FIFMF9800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca4f8684ce9abb5c19f03ffcbb9ddec15b4ed2904ccadcfa8b119c789f2ec60. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FI75S1500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0825c05d8a6e669ba304cd6070232d11c992e925ab8f461f4f744c8c52bae1ba. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/FI75S1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5effbfd256d5aa35f33dd367e057f6afda18e82782ae00f77869637e529b0b3. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/FI75S2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96119d7312ad33889bf8ff670db4258daa6929832990d876da2b2fca3aa65341. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FI75S2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb941479fa1f0103ee4682f6efba0ee673745f647d56eeaa9a531200792497d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FI75S2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0174040987bb86c8087f68329dc315376b8ea81210a7faf00e7ffc24c13622. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FI75S2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b6074abaa3a69315bcfce7d09298b4be86d53c15f43da8ef7110d075a0c76a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FI75S2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb032439e1b412882fadd9b2794d49e4aeda014bb7d208e3cab967ca6f896a6. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FI75S2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff8bf1fefabb3bd7b252cc64e0fbae747c41a23fc609dcaecbc36a6a0a2ab30. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FI75S2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094dbe51c759e4d066283bee545553d541c62fe04189064fa1a2807183d4b449. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/FI75S2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153ee1006f000f5a29fcf3ff7e791a36dd196530950ab8555c5bec824e4ebe6b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FI75S2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2436196731b6129d50a79e2a18342edd8fa706f3777125da5937f697b616ada0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FI75S2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700727dc845276b81cd90e109ab56232d5bf60e5b1d6710c62093160e5d0eb7a. 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/FIFMF8701300.