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 0x787345fe5e785c1523283e2536da1c71a774cb621505e02fc282a29cea7c7def. 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/cc7fe6e9-5e00-483e-99b6-8ad3d9d42ed6.json and https://artists.proofprofile.net/proofs/artist/cc7fe6e9-5e00-483e-99b6-8ad3d9d42ed6.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 0x476b6faf8f8395c6e34e6777ffe4779a4d2f898aed272b153868753d5a5daa09. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMDA62132670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b445bdf66b3f08a9c689a7cd585ecd61828cfc22531fd06a602af5f6251031. 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/GX8KD2226551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ca02f29e70ac19856989e63519086025daeaded848c2269fe72f0bd37bb5ff. 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/GX38U2286347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd544302b56cec871234ba5fa124741a8455de3edb3b6bc9412eabc806540738. 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/NLE712400234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d8726f3b41b298592d56ed93852829d9f041394c335b57dd414d792f0de45c. 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/USA2P2347833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dab9f2ef6125f89de4f8af34580c00a56dc45c008614b424ed01eec94b653e. 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/DEL712310232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eda2a882e0a9b488cae1a5c149a71ef0f01a9ed0e477364d354d48c656f76c. 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/USA2P2339448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e811a8b5b3e1470212752fd9d1ef0373ee2257bb6eb176576998a20068d7f5. 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/NLD682302484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4780445346cf77f1706658f3a807a032a144c4505d3bf98305c8b0af6e3da8cd. 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/NLE802300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fbffe955542823f88bf96c4d239611cc86281a14bdc474cc5837f097aa3342. 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/QZS662281038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b26a4ad6d8e689b06a2e5cb7df568ba2c2c7b2e5633b9432351d6dd9937f38. 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/USHM22212726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74c9fb7b603888fa0e55e8bbbdeaa975ead730fa1d114954d4f328d39fa5345. 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/PT1KG2200244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e61dc4d59eed708b74424df91e0fd2d29f81a21047a55c01e5883c20594fc1. 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/QZS652196946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4994dbc4eb0b01014d75a2ffca5b48a67c05a412e0023cc4e9a9053a353219c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZMHL2038987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13fdb2dd7413cddfd31e8f49760943c6b01835a0e6711bda5673e170257665b. 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/QM42K2102016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42336b095e9c2acbfcd7ebefe58282516823df7a12adfb193224334274067530. 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/USDY41958002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22e00916e91c2c7a1942f1bfb9a0859213f9e8c21218f8e56b94c67d28f2f22. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:21:38Z), 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/GBSMU8489687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369a920b604eda78648081be28b18b8e3d85b3b83fb5332a2cb82d796ffc4f4a. 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/TCAEW2007991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920c6a631d4663e60ea2841e4f7a3122c798af1103a62eaac2029627a89a46f5. 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/USCGJ2097017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63abf5180bbadfe856657d90e58290c2a349ab2af4f0394133fe6b7597081a7. 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/USHM81808520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0359c30a6299086b6b325bf5cd430493939462517f63eed636e4565ef0cbd063. 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/USCGH1831110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46873c053467c714aa8534a78a397005ffa3640b50ae344c8eff4adf4cf41923. 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/QZWV32458677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eda524171ab0b508bdee82c20e0fd8d805918489a784b355e5a26aa6d6cd311. 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/QZWV32458681.
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