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 0x15fe75852dceed47e13cc2a8854ed5a15a9832e532846e426f8d109da07352cf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17ae90d4-e0c5-445f-8e4a-ea3bebee3d77.json and https://artists.proofprofile.net/proofs/artist/17ae90d4-e0c5-445f-8e4a-ea3bebee3d77.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 0xbe5f03448471bd08ba274f81ca853c7fa5a530c6d8b9bc24c38cc674ac4337b6. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/TCADI1770134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce169f3f62f732d7cc2249c28c938985042576161b028618ef31853042f2e36. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:11:12Z), 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/TCADD1738738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21116cab99b6874fb182fbbeedacaf05f99fe3f3769144ec804b357605bc38fa. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCADI1770138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06828193f11abe430b7817577ea99f071ebb5c856514cd636659561ad1db34ec. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:15:48Z), 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/TCADI1770139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844f945b9ce3b27505132226a28dae376ab7395accac8a41e2019fc8e0af6054. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZ93L1959706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f236f2de5e1027c7d481df3af20b1ac0dfd03e4d4baedb8ee6b19b0f7d53d27. 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/US23A1512100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7da8c6e32afa0df9818d0e94593e51136264eb3c367460f29128dc3a414ba1. 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/US23A1512096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9c5864abeddd5eef66573d62d29ad8d819731e34f006ad81d0ad4a56311e20. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US23A1512097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a2fd38fc3a99e418e82bef6d6e2085bba675a266bebeba73c06c590753ba67. 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/US23A1512098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f78ea4e6123f4cd8b46dbc3b5ebc4d3eb6ee41cf4e26157f5e914ee0308809. 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/US23A1512099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f236f2de5e1027c7d481df3af20b1ac0dfd03e4d4baedb8ee6b19b0f7d53d27. 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/US23A1512100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4fb1d9db8b2c4ba6b8f3a8d9116fa3e4299db8c0e6b6b9d56d16376aaf8734. 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/US23A1512101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef677c33c9806877d8754df03181538e3aa588bc7546e049e0d7dc9178ab9634. 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/US23A1512102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05f4fa21be2bf5af099bdaf6ce49c688aaec6c6f439cf470974736ed9529b64. 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/QZAKB2173964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf181f0ad79b468ecd5856d49af6a3497380365be437b2c6497973187646e934f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:33:05Z), 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/QZAKB2200804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ecabb2959b064cb7112c250b3289fdeb612162dad89f5619b7a586b65470db. 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/QZAKB2200802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc9c55aa07090390871fc3924e7a44b2d58cd48a11be57a13445234900db320. 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/QZAKB2200803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d969f284d4f722d27d61608a6b5a701f904ad1c44e2c75391bb21f58bb9c69. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:24Z), 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/QZAKB2200805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabac020019e1e98a7f28b2269a7eb6eeb5d841a241d0a8850310daaa779cf83b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZAKB2200806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52874ddee6f5a92efe1525bcefb4725c9a5b4a41a3d4885ec3293716564ca5de. 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/QZAKB2290942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07394f6351ae47cc110bc2d2c3f72466b4ac4af03c30509e070200ef7c6e4253. 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/QZAKB2331353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5558e383ca9ab374b2ac15acd8c1fe42e59f6491c358ff9aef9efdf3de9e51. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZAKB2312417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b7bc453faa642129282128bb8b43fac939df6286f780dabd5308bb4ad82084. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZAKB2326675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c8d7bd8b3de599cfda17264e18986714d8770069b0b90082c974762829d5cb. 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/QZAKB2331357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1860c50bac9a0ac1d75de73ac1aa0fe1801a8778b210ff906c61b476fd0ab8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZAKB2352755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160c051ea681d32f38bc4cb7482552d19fa36f7c7aeb18799c7cc706fe9664b4. 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/QZVEM2368710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa349218795a87ed32b327ceccc7b22221fdb7a171588d4e0cc46b12aadf1195b. 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/QZVEM2368711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee4e603e15bfb7b94cae4b8b73a28209eebf1baf9c97ee2f5109a9b14892583. 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/TCAFK2144686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43a3002f84070ae466da8e5b289e963048791156940032343cf11fe3a89353f. 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/USWB11902131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a496d49fe9f6fbbca6eaa30ddec9814370cc953466788c77cdc9fb6a9f17d. 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/US5ED2304807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a496d49fe9f6fbbca6eaa30ddec9814370cc953466788c77cdc9fb6a9f17d. 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/US5ED2304807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55014645a954a4de6fa8211494c21890908e312b029a64b6a7c0279c04b9ac14. 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/QZS7J2224230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8657052a0174a32ddad41b3e8163ecd3c02805c3321ba23a150e309ee5c4f2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMFME2167667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8657052a0174a32ddad41b3e8163ecd3c02805c3321ba23a150e309ee5c4f2. 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/QMFME2167667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162785bb2e586fbfc1ef726801daa31aa99b018550a640f2a5a9e784ca9f9ef8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA82273284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162785bb2e586fbfc1ef726801daa31aa99b018550a640f2a5a9e784ca9f9ef8. 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/QZDA82273284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a84dce58d82595ad50e4c0a6e2a408c031b32494826916959f6011131df53c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCADN1811800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a7ec993beaf3cf256f78486b64ab1a44d7b7c61acadd820be5db6ac6a44ab8. 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/TCADR1879241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7e1e0edd63f4e906586c25e7d66762689532586c08b4d094f3a6260ff18b26. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZA1CQ2000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc429f757c8904d417a8c22115157caa1dff0e776ba69e265ee6127fdb687cc14. 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/USDXS2203705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b84c8fbf6086d28557231752c1eae12eabb8908147244764a73332c75362990. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2352912.