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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f3bea6a67b075db43520f486e827b99bd27d39ac2a4859d10e817bf9ea98c9. 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/5ebc690e-12ef-4461-b262-1cae790a87ff.json and https://artists.proofprofile.net/proofs/artist/5ebc690e-12ef-4461-b262-1cae790a87ff.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc517404bb712e424eb57488a910d6a8bf678430591f6a89d1c12e720d2b0190d. 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/QZK6P2439495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b39814226ce0572c9984562c4762c2daa9a906febe3bb780704c967636e94. 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/UKZGC2404959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21677fd57b3fa6920e97d112e8ba613fa9c1d955d09d76120588224b232655e0. 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/QZHN32481279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0570544fa5e5f2a4453641788ee7f6ad2acd7c0b50cfb5f621e640728e62c7f6. 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/QZDA52464773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9921fe20a2a19294ed5697fecd244f491852e4e3b46eb907293798fd3129ba. 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/SE6SA2465911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed587b679e1c126a40da90ab7f43d8e886fc797694cb806333fb5850b2ca78d1. 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/SE6SA2457609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7449385f9daae35310f38da445dbe67a65a23d5628c113441fad0fef46745f4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6SA2465912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffcdfcc88638f2d4e68535eda6482e1566fc5baf66b1b63c6c18f8e0b188bdc. 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/SE5BU2530820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192cf47ec182cc101a098103dc535f8dab0efd57687a24ce369cbd491bd2f2cd. 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/SE5BU2525636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7313cfb4ea825b3f876eefe80fb49817362c7b9162d590dcf412a765b8ef24e6. 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/UKZGC2500529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbd6f92ce586d14c5ba6ad2f5dbe80cef118d287cba84aa0e9765e76b84ea50. 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/QZPEW2513319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd65d78139d8a47230692aa661cc2956ff7419d6b7e46558d87699ee451b515. 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/UKZGC2410751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060ded8d687ba874765393d199437ec8109c01458bded910e21cbc1c874ee1b9. 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/QZVEM1847063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f39427a0466af2ae70984b82dd35e96cd2e0bcd4a714e22d1b5fd280275352. 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/UKZGC2409582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6477d3de6fc2b608fbfdd2878a2b684d2dc12564fee5c7ffb24f4f0b80284332. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UKZGC2407724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c09dc64606baa55942eaf18cc0435ddb0bfd4e69ab59fb2521bf3cf9d492249. 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/UKZGC2407963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2fc2f7223f7e414ac8f9ed902db48666cc9aabbab0a287d62737bb33ceb2da. 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/UKZGC2407965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466e01bf0a49500f628d9321303878609bf4f58ac9ead983f9459a437a175004. 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/UKZGC2404992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4adda75b463c8f00935dc19f1308e7f9fa20d9919e85fc2820aa50c31f9920. 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/UKZGC2404993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dee88c49188128166e98ba1680aa0c1dca440379a85676a3e4fd226c870bfe4. 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/UKZGC2404306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f52eda83fd092ab6b9b8cbbb1962067de58b2f57e1fd4ed32e37c68c23adad. 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/UKZGC2406343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5db3319894633965527e2049b281ef5ece424203182775e454a34412b3e6fe. 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/UKZGC2402869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d5054de6402c669a972e4c9c1aceda897b298bb975acc7caeaf7cf32944292. 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/QZPEW2442084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f78ad14e32666ace7fa61ec84ac8acbf1d3c906631530d56fccb2019d5bbc00. 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/QZPEW2442083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8231645c8d51924dfdac5878e27d6f7f0f9e2c54c96f286efe6310fb4f9973bb. 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/QZHNB2464866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce95914446cf1522fcfc9f6a8e8f562b6c529e0cc56b8b229d785a1368bced83. 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/UKZGC2402470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f80feab86636b23e1752c57a9bf42c0a2d59cd84771dcf253b60a2227080855. 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/QZPEW2434288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0011fae0d8f553d11ba040d90f88d418edddde2327ab958d6c58df815720076. 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/QZES72421318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad0606175da605129630d73b37dba6e5707bb7ce4bc7d669b31b6be62ea8d5e. 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/QZES72418454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e10ce44dc4488584601433ddcaafc56a00cd38f3de192b51ed8113da04628a3. 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/QZES62492760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2babb5e9efbcdaa30c804760f52fb1450e18ad0179a9c56e760145a171449506. 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/QZES52412768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb893dfec33d6cff863a9bbd7bd5d37a396a856a16ef93b95a97fd853783442. 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/QZPEW2442082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad0606175da605129630d73b37dba6e5707bb7ce4bc7d669b31b6be62ea8d5e. 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/QZES72418454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e10ce44dc4488584601433ddcaafc56a00cd38f3de192b51ed8113da04628a3. 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/QZES62492760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2babb5e9efbcdaa30c804760f52fb1450e18ad0179a9c56e760145a171449506. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES52412768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd585f7cfb1424f6139f8e44f830adb211280290c8b2778c03ac7191118e386a9. 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/QZNWY2230632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53a51a34b420575201779660ffb6b48c6d832d070cf6d20b87612151846b0fb. 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/UKZGC2400856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467af4a642956b67673f195a7cd5cdcef80ce76a7731bb8948468f33257216d2. 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/QZWFM2390765.