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 0xf8a2e6548418ebf9828ab422d1565801ef79c5616f37bc5c2817848d17079522. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4911d7ca-391c-447f-8e41-a33ebece3491.json and https://artists.proofprofile.net/proofs/artist/4911d7ca-391c-447f-8e41-a33ebece3491.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 0xc700912aae86c9e1c63c6c5232d3c4876126ddebe7fc607b32b62206a133b428. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BK2OA2400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae18ebe63364d7538eeb83d863c871965a2865b99ef9615443039b9d5764b70f. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/BK2OA2400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bbedb6df2b4856531d5b4f389a841bfc55feb1f19cd21b7e98d85d012e5afa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:03Z), 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/BK2OA2400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5781032b34cfb87f83e2e18054b7eea35f6795948fcaa4dfc585c5d61caeb79d. 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/BK2OA2400221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97605595b44ab8fc411abf43842bb363c23160c28c84793db335dd32312cd1e8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BK2OA2400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0232069d977fe74e5eb6a2e093290f1abadc970106f7f9204935d3c7419f3f0b. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/BK2OA2400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b8abbb16ad52b861f4ab8850d13766d70b99f4e85f899ef41a16790bb98211. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/BK2OA2400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96e144ecbd148c9466faaa02139710b22f8f9c81e810d1f185e1ebd5b876aaa. 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/QZW9M2442864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c1d0bbebbc00bc6bc3bdda487b8f5074872c37eb3eb6473a6734eba878eb5a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZW9M2442866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596252d4ccbf6f8c4c98302985f2cf67d0e026a9748fae5e18bb8d732a1e7730. 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/QZW9M2442870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce5d17d3c82b522bd3cabeacf014ead46cdc2a9e2b011d59c5e5253898a4fde. 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/QZW9M2442872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89962af11048bb807b2df5ff8a1d2c6cd346167374427b0ee72b2744bbbad393. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZW9M2442873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45b719804bdcb7a6e903779eefdc06b37984b7e28374b47722c19e99ba60a8f. 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/QZGLS2552681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ac7df1797dd351d10057d4a77a8d09c21d9c47d1e8cd14de09e48d5611cad7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLS2552682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48a5b2e5cb033db5855687eb4af4e24c59f0de4bc5e45cae6a1de80a05f9daf. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZGLS2552691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa446ab89a3ad95ef067e705b88028118df10c89be3f598112ee484bc03778cd6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJY2590707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4755850f28abf667f43f86deca6619b74d785999958a61f6767fbf6ff84f8d1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:31Z), 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/QZNJY2590708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca063b73867fd6bafcc43242432d49e10c5c3891919bb74c4d03bdaf5c44b39. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJY2590709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbe6e1429be506abbc09a7404dbd7fd077e371f0ac56f2d8f24439268c8d009. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJY2590710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbef542a40233aa12a408abcf1fd9ad9c9987f9e0070739241ffdfcd14644c1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJY2590711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5577c88d16111c64f55951a35f84a391757f74fa5d589f764ee59263818ff22c. 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/QZNJY2590700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535f230132eca62b743d90c7eae09ac636541f2f43860de81395ff267eaabab8. 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/QZNJY2590702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3041a3aedb010f2fe764efa299ed6f0ee233ce7f341400091e2bd603d27af5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJY2590705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82916c4e88f8931e9986f08f41b84c769ffaa395e91fdac832eee2502cad51c. 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/QZNJY2590706.