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 0x46f69cc9c8c009eeada69bf6285f845e9ab183f41c0c84ed042a5a3dcec463ff. 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/f96d56ae-fb97-42da-94c1-aae6aa868dff.json and https://artists.proofprofile.net/proofs/artist/f96d56ae-fb97-42da-94c1-aae6aa868dff.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 0xc7fd70ca13d83d9d3946141df1a82d1c898298dc8da4204e242bddc6c2cfe2e6. 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/USDY42424399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76f2fb038f4d63eebe38cbeb0ebe9399c06f6f96578d9bcd909549a78316780. 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/USDY42424405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17eba630d2f08017cd853c8b7b034e196b7e0a5b161b5ffeb37a625dc274a6b. 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/USDY42424407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b5ca9713f3dcba2e630cc54f60baa776ee7ef64ec98c292ecb3751f7af8e71. 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/USDY42424408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b0fce400607867cffeb8ab70a3eb85c3da878d8130fb487fbd53c1bda57b16. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USDY42424396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe7a4b51b1ac29666b36ef68979f0d65ceee2f06e8a95582b61166790b07ae7. 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/USDY42424397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854dd8508b3243242b4407adcaf4370314bd780dd2f17b3d3626cbbf906d051a. 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/USDY42417607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d17a5b191c7b9a1cb69a99301fa5a243bbb598749162a62d897b2daf8b6dfd. 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/USDY42424424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bb1ba2fe36077c50a4e51477d47b23c1fefad878c0731c704dfe9e99afcc9e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USDY42440556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a712fadf79e7e6784f01550afde67d45c1702c6198ba863d73359698c734ed6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USDY42440557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa697a38c951dd3f847c942e0817afc64331e91796e179441f5d4cff260b87443. 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/USDY42440559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c2fc15c8796a4344931ea9e49c94469f2e855a5bcfa80e78052f61e183b6de. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USDY42440562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633e244d7340b734d9181213a9e286f1b40367be9689c7c65aa94a40ed1323d7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USDY42440565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e65ea239d0e0e42307e80379ac287c41b9cf297b799a6f54531c63dc576e10d. 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/USDY42455471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82acd5858f014d13109506a1418c74c2ffd827d9b9ba2adf4d7475c4c3f4e2df. 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/USDY42455474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134dc65aa1712bcc24197d4522e9ecb382cb6b049b6851fd3202714e5247e980. 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/USDY42455475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fccee57dd5cc1868c2e652b816c173021c714eeee7e20456617c9755686e3fa. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USDY42455477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da696be29925c92c40e49b69fc8e20dc449f0dc0dce6cdf9bc8bf003d2bd78f. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USDY42455479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe563828c118dfe31b13818977b90bd643f3f8e5cb17d7804e5f087412f2483a1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USDY42455480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9768dfd6a2f3af548d2f3eeab01761191e43f678f706aca6832e123b3247e54e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM22442474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03827ba4ad222500d53c869377819d5439dcc20f25a7452a65342b43ed5b7fa9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USHM22442475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1af155d47f364c0c26ea73b0738042f5725ab41b0ac63631887f72b855c678. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USHM22442477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35755a6c51d479e6f5ebde3da19663bc4fbf094b953862e50a35e2bd5a641cea. 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/USHM22442478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe215dcffded408a52db0f3d9f0e2583bbe5a24c83d321036259512a8da6e1328. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USHM22442482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6affd36399a86812b5427377b0afcabbbf5284cc45e5f8d2ac65973f8f320b9f. 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/USHM22499627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f81fefb70f911299e598433a6c992b5ef2e559a7c76f889c2f6603737cd754. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM22499628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dcd52622e34cdb840987487a804b417c35d46e95fc92b913b65785e67ff7c9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USHM22499631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9832cecb038d7f51a95adca2fbd8cf3c4aa950b040a5dd5c8a05923f9c3d78. 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/USHM22499632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81073f4bde29d38586a34c92a3ef7340a00f280fc3639f75be35c49cc4b4464. 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/USHM82448177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0515503857e160a7400433d50d78c6700096364a75a8c84b1bd47fdc9312290. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USHM82448179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb693e125a2e17e54f433e56f92a7bded548ab4ec0549fb3930fdf37875c15a5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USHM82448180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d10825febc0fc4a82291295c353bf27814d7351abc5c74f01fae1356b51010. 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/USHM82448181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e45335e175ad17eb2cabafa8ca2a7dd9c85320a5c5927982911e16de54e9f5. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USHM82448186.