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 0x061028572ecda07a703f64c20779079fe903ef855ca66a5d3fc03ca0a513c79d. 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/133e8772-f396-493c-87f3-a5d3b9a854be.json and https://artists.proofprofile.net/proofs/artist/133e8772-f396-493c-87f3-a5d3b9a854be.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 0xc484026d23176f76cbe2898681fb1a3fdce1fc54e2604ad50fd0e2e854287203. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAT2564290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed47e4e97d7e2e485b6f37374fbac76116a1fc509e35ac9a4239a400c46798ad. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAT2561754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb959d7068cf8d796c1d38548d35e94d0ebdedf12d90165f0c462e7d403ba182. 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/QZTAT2578172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004ee15f93bcf16e083f63e9156917f75f2e5985936754822b9023280778b602. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAT2578169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb22a4d0ab5d07ac1082ede301873bad7daa174765d4defbd19aa020552253b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTAT2578335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c96414bc67dbaef91489e82275e570de49244bd1ebca27d086830dd1f388691. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAT2564276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8712c40110b9d8718410ccecdf46e3f4c4d744a36c758e547ffbe1c09ba23b1d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAT2578171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be1008323caf73ab07423b4762da87b97132d5b8fd5118faede630358515339. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTAT2578270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48906fad68c565f6f7b6fd98080a061a7312177b26c2a50e56ae7cc0d743f1a. 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/QZTAT2559279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4ba5c3fc3d7813b3dfc032bf802d7c7ae95ff8427a4eec372b94cc5a90c457. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAT2578267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636ee14236efb4838b7a670521f2d06d2176827f7a1e98add6584c2eca0a1e81. 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/QZTAT2576480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf93aa3d88665388c0915afc08b1ce920a23017859ae74e337b04969b187486. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAT2578154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14552ac4cb48f41f1de0314c79323abd1e4073b6f8cf46c7cfb37018c6a5eaeb. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTAT2564291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798859e00fd4c04e462d9dbbfc0fc743d9876a14e929f3266390a99a1ceb64fc. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZTAT2564273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f5c566889114f431aa37c6448ff567245370fc009db6e0d143063473e06bfb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAT2578175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fab046cecde7e33b3423b147e8b5009d51eab7e2a7986452f6c080d77e3862. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAT2561814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a3719694f404397df4b05005e0ca91420a8e72ee2251798084ed005ae50b59. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTAT2576502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c59941bb0f510e53f0e0f3f5f5db4a013fd42969753021fa3af4baa715e5f5. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTAT2564270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9619dfbbe8c2fec7b7629d90d5c58ff42323e1305029edd01496a68979f13a7. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:53:21Z), 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/QZTAU2502337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dd6fad0824aed0430dac34019ef9a4227a19619ed498d48028f8433019ba76. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:01:37Z), 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/QZTAU2504138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7e80a1f3b9e6643df4f417841e5dfbc86cd1b440034cde47a2dd9afbb885cc. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:02Z), 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/QZTAU2502323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb23dbee689e2507b95d4146f4063d7cd9895020b29d48f7eae9bb715b824f0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:58Z), 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/QZTAU2502336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf317b5a1743cb429ae49499d2708c165c524d162615312d506aab549819baca3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:24:09Z), 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/QZTAU2502326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9bbff233e4f0a637e048aa35f5a63272230142c4ef1fd0b9647bb8e300c8e6. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTAU2504133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ea037793f6225dcb452808008ec23ab45124aac254bd1847e53dd72831036f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZTAU2502314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9a2314861fbab46d0eae02943bedf95ff9a70c1bc606f8ecb88feaecd8c031. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:09:24Z), 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/QZTAU2502317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058ba419df6fb6fb020a3ded5904fa6a117eac83d6b37c9061205524ab8d07d4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZTAU2504144.