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 0xa7fe6d52375db0ada7fd3a033c4d1fc104010b50f83a2cec0e2d469f39046122. 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/c108aeb5-d653-4fa9-a319-73a55743cfa0.json and https://artists.proofprofile.net/proofs/artist/c108aeb5-d653-4fa9-a319-73a55743cfa0.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 0xd0a9da599a746dc73c08f6bcf1b94608943dbd6ad0329190743b85e0eccd79ab. 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/BCCNG2200427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9037c1352bbf6a6c7921620fe0136ea9684a665ec6ed638d731b1798637a24a2. 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/DEE862301099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc49601924a10cab53c4a0bf5e2a74ec21c6c640421e4ec9aaaa80f62207ca6e. 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/QM6MZ2254388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe62a3c0c1491b075003e79987be4229e8d8411f4ab44b90c8458456d55dc52e. 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/NLT2H2300750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665ceea51d00f2027967dd090fafa3238f186c33e1fa4301d5a2766c1e2700ee. 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/NLT2H2300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6581e70e38ef249a507821e0a517beadf8431433f7df2b24230dda3940824bff. 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/GX8KD2337893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70813617c313f5a79a8ba05327ee893ee0c9e29b8a4d06c514d03aa18b046ac9. 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/BE8LH2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7018baeaed6da23a38f5a146615e2fff95367c50003c724017af3ab7e3681cc7. 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/TCAHY2422486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32efb710a5467573d3634365d357021cb057b976f6bb052e4306040477581617. 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/USLZJ2416596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1633f0cb615952750accb213620a29387689b2ba1635715345a988651d459aa. 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/USLZJ2416549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b75d60e6891941850bab06f9866e548c637ed93756597a2d11c5b84daf279bf. 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/QM4TW2442052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32c5c953f5c34ef16b1b8c1419f6bc69c0d2688a940aba93a0f53fd579ff18a. 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/QM4TW2442053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88e23c01476a10164f6a63fe78a9d7be5a73b9ef5bf56c97a54e181a3e3c483. 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/NLT2H2301173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9442072ace92595a25694b78faddbeb2ecc25dfac63a83dc85030c88c4974a. 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/TCAHN2305897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77fb620ed9496403f506b49ab76801f67f21b977eb7328426b021403884ad58. 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/GX5MX2319345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc090336138d61bdcdd72ac71fbf592a42176294cf0006bb2aa45f7c99fa5624f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH7812368255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79545f05156ca0b3c7324cddedeee071b348c0d8f2a0ca1c429a08ba91b66122. 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/QZWDE2305029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd6c4a0482d77bd122a4f8a4dc4f389e4f1b509a80f8ad9dd025af92b0b0640. 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/QZTRX2335212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66234b51c20a9b7e12245b939be5cd18264a18bfa945b4c148fc22f2c75f5878. 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/NLT2H2300626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab494f7a8c1385b3f55703bb92259f34062d6aa8233d5d4f9c2868aedac797d1. 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/NLT2H2300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ea4a7aa5a7060144f1022660aa469b66a49d408e6d749e624d8e0ebd19c9ae. 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/CH7812346751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9865f2a992e38129110510a0febfaf16df2e3592ed7545852b1acfa3e5b4a06e. 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/GX89G2386795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a87e6fb07ecc7cfa05f998ac1eebb6b72cf8953aa289cc8293b76551ca6df5. 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/GX8LE2230675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47b835b0a727f8b222e1221d458eb60fafe1db13835dfcca2ffde2cebde8f55. 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/NLT2H2201026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefeada8449d171aec3752a733695b057872fc1c33ec603bf1ab5081147ce7f9. 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/NLYK92200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307351d053b80fa2a8578d3787a8909b0c3a4178616609fdd002516240cd10a8. 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/QMBZ92271352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e2469e04390bd1c6e68e6b1d6486427e0839bc9abe2fc1ceb4e6bde1650115. 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/CH7812107098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8872cf79d4231c49de15b6f3cf883067da1b295b23f7537136d3644f988172. 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/NL2QC2100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4821f96160881d9003513b84fed545e0483f753f266ec12ff22c81f671eaaef5. 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/NLYK92100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3977f0a4691aee475978f37d0e30b3a4b17a6b4a74bd5fc87f849013b152b6ae. 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/NLT2H2401058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561868678bc534975d00a47e39d5aa2a4342c46b19455ecb591c7371478d0484. 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/FRX452562286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e74ba0a85c6a18c6918500f807df3a5040d00636dd03aca22f2361c18d8b2a. 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/NLT2H2500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1db60993bb4b921990aa02c42f3ff20069f1d44a2520aef3f3c1ba215ad487c. 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/USUYG1713840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6041ab66823e2f4b9b967c01e4dda7a908f630d311ac76bd58f82e583a22caf5. 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/USUYG1713842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de0f7bec5ff1c803600945154562a4765174b4ceba714ab9d191ee67560ebcc. 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/CA5KR2493895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13edd9c47ab835f4711a732ac093624b141f53f04ef57c2cfcc657ff16d3a28d. 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/CH7812414483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22775eaec7e711e228ffaadfed3555f90feb939d1edf4cea24450ddb00f2ce26. 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/NLT2H2400986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279c50c222670863095704c2f609969fffb428acc59c7e5121c938b507401545. 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/NLT2H2400957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606bf3114a84a701ed6ebffb32ce6e8b45984b094fbbdac87bf43f986da7329e. 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/CH7812413035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dccc0f5ef6cba94588d192c66a52d7806e205b8df7de360312d202e11b80b60. 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/TCAIH2405923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ea4a7aa5a7060144f1022660aa469b66a49d408e6d749e624d8e0ebd19c9ae. 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/CH7812346751.