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 0x9afc8d16a1ccd33dfbfe6f63c928f22b577498d2afae0706d8d1bac0818e35f1. 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/1ef4060c-d497-4ecd-8412-4b720f6313ce.json and https://artists.proofprofile.net/proofs/artist/1ef4060c-d497-4ecd-8412-4b720f6313ce.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 0x4b3027a56bfb16e66a939b230f07d17978ac18c473caf75fcb251f6a1509ab64. 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/RSA221601850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee9a6a485d83b874ca90768364a43a741be6639f77a7b15ab65b6ff4ce9bed8. 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/RSA221601852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b915dc807c43592c8c76d98533c8599efbb79f77d0977d9c6e957bc987334ee. 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/RSA221601855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc47cacb4ae2be34209cbbecde839c9022bd006927be3c20bc6a1fb15f25d8eb. 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/RSA221601856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa896fb9db4260b01dd2af2fba3389f24c914f333295007b4848d147789b84df1. 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/RSA221601862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf52d0423ce73f997e352f2364406bb46f50cd57457c85da900027e10b5f64e9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:03:24Z), 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/RSA221601849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3027a56bfb16e66a939b230f07d17978ac18c473caf75fcb251f6a1509ab64. 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/RSA221601850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ec0f1fce6f19e21e01609bc01d928c5aee28b031c34a28e4c2a0c3a4c0dfe5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/RSA221601851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee9a6a485d83b874ca90768364a43a741be6639f77a7b15ab65b6ff4ce9bed8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/RSA221601852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec943bbeac014e0572f01ba24130f11eb1efdc928cd8641bfa03f59ba70e4894. 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/RSA221601853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f9da503fb62964f39db00ecdcf833c291956c05681839ebd9ddbde97cb1f5a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/RSA221601854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b915dc807c43592c8c76d98533c8599efbb79f77d0977d9c6e957bc987334ee. 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/RSA221601855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc47cacb4ae2be34209cbbecde839c9022bd006927be3c20bc6a1fb15f25d8eb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:07:05Z), 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/RSA221601856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29a5b48bd374d1c068da7b3d6475e5cdc6169b438a17da3070597e6e877f85f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/RSA221601857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5664c0f29f06f86e7e9834bd2067275c4472ae33370a03a31743f2ef095230. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/RSA221601859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c6feccd1f13aea23c76aa07fe7a534bac9ebd193c2ff648361a5d9ce2814ff. 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/RSA221601860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa896fb9db4260b01dd2af2fba3389f24c914f333295007b4848d147789b84df1. 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/RSA221601862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e31d1047288bcbd8ccc084065ea718f50535d6f7d435568553ffb99a6957360. 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/RSA221900918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85db727fe75d8444a9d4abedad57bee0123465b05b5242eb8877cc90e2caa99. 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/RSA3U2200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce64a532260d12fa7b939bca95a55fde7a643bb71925d2aabb628407f1568d6. 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/RSA3U2200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f31a81c8ad59095bc1d4ea49dbeca3a631eeea618aa9b5468e3f5b368e80de. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/RSA3U2200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb343538ae268339788706f3160e4e15ca8cb464041cbd4c98e648791914d6be. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/RSA3U2200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8532e58ac7e3d7ccc7dffe7ed7eb3b169fdba9fe39572c611e400deccee3cd8b. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/RSA3U2200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9834c30db3e61faedea100bd1c9e1d6463d58043cb7abb75787bf60aeca724. 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/RSA3U2200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17957b71b0258049e6eb8f76ca9afb9d8dec9811056f99fc0edcb04963c0e614. 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/RSA221600352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140dc66cddf069772c865ea7e42683fda3148d5253557496ae00023ba621bb9b. 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/AUGBT2301290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61095832d8799e026ba2848ff3e93b4fddfc47b61ab40d7c8c253fada0e089ab. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/RSA221500645.