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 0xedc144067c7118e976b345b17ee928f8a796f7d0c08cdb824655239c9abf667e. 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/8b3af45a-8802-42ca-ab12-a95b5cf0aa38.json and https://artists.proofprofile.net/proofs/artist/8b3af45a-8802-42ca-ab12-a95b5cf0aa38.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 0xd3412a14275e597ce26fbc73cc556981d5e68080b21dfee70d9860411dd8b911. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:44:39Z), 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/ZAA160000138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52ff8f07b07bc1b118a9c82bed60482622f69a7293df6e75546e9d6ed34ef46. 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/ZAA160000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4dd7858e760d779b84ee562d60cca97e647f5d35e68f72eb5491c9d75355c6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/ZAA160000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafae324383c70632e6408736a8dfb9661ed30c7e78b329d83f1dbef9f689baa8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ZAA160000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe3b47370d1e44335359ed8c1aed5b891322eb0407a83e0b9f7a599cd56a396. 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/ZAA160000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc114a4f72f8bca5dfa58a81f1cf60449ab01d1f774fc461b8169ad0b99286f63. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ZAA160000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1835c2d573df2e73d7ec25e962e32a322851745c77667778269bed0f48efb465. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:38:21Z), 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/ZAA160000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dcca172c7cb53af23b35308b573d2f59bb2e6700e9e0302348ba7a891eeabb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ZAA160000145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c8c005041dc65d0ef010930c2c1122da3645c920390985e22d728b1acf252a. 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/ZAA160000146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0cc3968798f2cda806ebfbbd036b8dee01deb801808dcb47e5d7a9b5a2546a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZAA160100414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dcebc90f4cf5c84a0260f4042ec2c2f334b5bbb3e910a6f79bd7ad4d522f3b. 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/ZAA160100416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd58f9c566e664d642c223722bf79ea4b8e71edffa547a7884ed44d0c1929aa. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ZAA160100417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6416dbd86286291af22073c6a8faafd60044dc4d30443dc243a39aa9eeb880. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ZAA160100418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d44198e33638deea23a9ffe633d501d13e5342504d8106d972e8d8552e9f47. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAA160100419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80bd42ec4f070657febe43946aba8c2c4133da131d5a68f1d442d834dee841d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ZAA160100420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de438304b10e47a716d81303b66998b7968df3c38092bee47caa8e8051cbb04. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:40:59Z), 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/ZAA160300557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345f28ec84e837880de68a80a3fd0657efd3f4727219a969a052f29a2f66f34c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/ZAA160300558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00657dc110ff9ff20652fe9190291ca3911fd2f4f6d8f978426056e4ea24ad9. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/ZAA160300559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1487f9028d79bfef191797d45daa34884002a15209436bc94853f1f137430d7f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ZAA160300561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d76fa9759f682afebe79f4405951097aeddcdd908a10713953fe734713f3f5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZAA160300562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbfcb87efcd1a0aa05a3f367f07fa7d1d1ee10330e0d7e8e92307ae1bf99c5f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/ZAA160300563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43be05b65c7f9bc2b1aaa10720f4e11dd9d8a42c257a597b5bcce97a9e9ffe6b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ZAA160300566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1865f674262e3a8dcb0c245c4d545a53c278fdc5ddb89b6fd36826fc325a4053. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ZAA160300567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb153c09860270ff2e5c14b6039348648d15934d7f6586fc8157e0c207ae5bde. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ZAA160300568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d13a9e777a43fd585235e1401f24768faf0f26cb78a4861cd9ce23a65ec6d0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZAA169700251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4612b4f694dcde95f4ae8f2b211ec5e118fb1bd7bbcd548333d5b98caef34a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZAA169700252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627ead3e3a9ab6d7cdeff761d63c7a0437862dfed0fdc79be66132d05f7ac5e5. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/ZAA169700253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a020d8d51a6ace4876221ace1521c1ab3d17679c115d5dc77dcbeb5886bd0c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ZAA169700254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe25a981b08356ac3a163ecd99d21ee3204699985ff7f27d4ff5a3eaf059d88. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZAA169700255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4285014321c6d1ce257bfe16f70b531eaea2d562b581d8bff2099a9cc7b1812. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/ZAA169700257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141751d0f673bc3a38e12a4173034d635dc7bdac1ed8137f7e67ef872d32bfba. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:22Z), 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/ZAA169700258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209e8219a2f18fcf5c550621d53d7a75e1e1b2a727bee3a72932e77288ec8f7c. 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/ZAA169700259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0667e33f80cd26e319bea5693077e665325137a9842d63e95a73b20b20c42b02. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ZAA169700260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d13bc19b52a87a3cc54e0d2ab862a1cc289e1f1a7701f0884c373dda6e55f03. 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/ZAA169900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3164d82eaf99c6844c5998a1a5c8890b90c8e4b13dbc4f870b510b470bfad9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ZAA169900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a2315a9c56198e3e0a70cc096ddbba93f876e66fba78d9c61e8b7be67ee1e6. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ZAA169900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fe16038fde0cbbe0311baef5aaf882b5b3ae14c7dd79893ba83d7712595ae2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:30Z), 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/ZAA169900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c95406fcdcc86eddbe3f617ca57177ae6f556f30844eeee739e92af118f359. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ZAA169900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af0aced51c43879c676aee73e626d5739761000736d985a807076e645b3b22e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ZAA169900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edd53437c906aa158caa99d7dd6cd96ded365ad7a7ac16656ac94c6a5d30e09. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ZAA169900036.