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 0xe13e6da0510983f49a7debb24d0bebb230231c9ca701729b5f63156d41f685f9. 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/281ba70c-42fc-46cd-82db-40f208962d5e.json and https://artists.proofprofile.net/proofs/artist/281ba70c-42fc-46cd-82db-40f208962d5e.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 0xc0461a458e3a21a90c296221f5771d2fca5e838709e55a09aa5606aab7d3b9c5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTAZ2256279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84bc2dea05b2974f3b511561a9221aec57b8c59c28efbd680a01fe992f4f60a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:19:58Z), 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/QZTB22203502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd283ca4524e620bc8e368858c30006a7e9d6a8adecc36b61017feea7674866f1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTB22288089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8dc02688c1ea9f529a94531c0f2fc950148c70c83c59f84a3eae485d14cca3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB42240555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199cefd9574508c2af094903e0a466d851b7790869bb954d0a19b688e55329eb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:27:36Z), 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/QZTB42245230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be35f71d42fd5851a96db54a98d0b8487258b6106782d55d24b5339d0ec5589. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB62253650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073cc2e646517712065ba02f74d016371182014ca548522fe1eca9b3e0b49b37. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB62298640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4018c4c8326ff914131fba2009993551d21c41c46810c202e9ccb7eb157b79c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTB92204018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d943744ef70d0a367f68aaf4219dc690a09c996cc9aeaba07f8c4fcac312ca. 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/QZTB92206918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084b9b88884b4cee904477f84b5a957f1031ea7f84496ba9305330ae30322262. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBB2224197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922027ed31f23502a841430804adc02178b87e50ff5e74547b1f36702b6eea9f. 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/QZTBB2227098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e518636ec4215c5dd1778d8e5b327601fb9ac6614827e4ae57c29588cdd84d. 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/QZTBB2224274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8dfbd8c36e0aaaf7ecccf8fe72f001dc8f84ee08594e9c85957a9383074808. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTBB2224299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53fc610e67452f14f5c0812a72c41926adeb26db8026ac47bdf754b7e413f37. 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/QZFYY2312323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801f9dc32a5f3708f5b5e40bd3a0d9073d998d8f7b3465dd6fa57eae82e04aa3. 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/QZFYZ2378388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6fde331b20740b0aed7043969cf64b756bbf6c3a4abbad299c346e93c25dc2. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZDA42543666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49303bb302fce65ddea3b682c7562cf05ff8ce5f057a289a39be21a5a9f5aabb. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZES82597937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c865db572a03395bf12838339f431b5b4a1df1e9b24bdc6ec9bdf51d656cc7c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZES82597938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14dba695c121ebd4a167fafba9fba822eea9c213a42a7b3f663bbf63a29ee4a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZES82597939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e848dd593d44b56c9e247b1308a6ff3b73af479739771a6803b421d7a752982. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZDA42543667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123961f169a1f3ade7c927d9c8fa2ff5c44f1bcb138343df8b6bd3bf4c909a44. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZDA42543668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25268c638b1ad7605f66fdc6f01845194a0593841c6c5ef490581b92906300a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTBF2563029.