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 0x19d9cdef7303952b674831dd392ed39d7638b47a2248192010cd46bbacbf1238. 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/d948d28a-e38a-4e34-859e-2540edb9fd1a.json and https://artists.proofprofile.net/proofs/artist/d948d28a-e38a-4e34-859e-2540edb9fd1a.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 0xbe7cd9883beb8ed39fab43bc6258edc79cadf6ae400e28a4894fd98d7685279f. 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/QZHN42243320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0272b97f3d6f674d785a64bf08767e9c983ffb58d758d81fc8dd5a6eaee02b37. 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/QZK6L2241062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6ecafce53c6467dcf73faf2aaad6876ffb902af95d7dc2d1678741e69c6b12. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:11:59Z), 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/QZK6J2262330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19d3b34e10002c74a17ca13255cb6578eb254d85d9b69510d979a8138fea910. 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/QZMEQ2285441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fbf96b54b0bf584c6a14c151481bae5b647c08866ab281ad665e6a84d1de0e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWZ2258367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63fb34be24c4fdef2081e2a58f1369eb4ae8f8ef7d893bce048c88da4129284. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:28:58Z), 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/QZTAT2266310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4482455987cad6c9a045e5c550afa07d63ae0bcf0650b74b27a36f4e042f58fe. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZTAT2264038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a78b3f8de03741526f818d6492b2ccc6b3dff39da54b4a81bf58c1e5c3ae2d9. 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/QZTB32275576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25910872e06b52b87b9983b4e1eff90077b084747e6e5bd24905e15abb8d9123. 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/QZTB82231434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad3b75a197a1e8418e72bb7c5caf70b5bab28211b8dfc6b6db43b0ff71d706d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:52:30Z), 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/QZTBB2224212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d672a93ff6f205e5f1d71e13b83eba3f6cf9d84adb340d6229708e81ee70f5. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:41:57Z), 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/QZFZ32341840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840450fbedb0f0439b16dabf913f7499443cbac5877e95a40f67971459d5cca0. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZDA82375666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87989982072bece138c3a9edfb03addab6c038a566fae798098a087bfc4d11fb. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:33:40Z), 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/QZDA82375667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0669d2a5faafede4b120ab515ef2834f3c64efc154c6194aa9afa9e71f466e2. 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/QZES92330246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80911273093acc4ae2e3955d7753ae55cad00ab32904c514919e25d529632c27. 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/QZHN62360111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39af1f3f1bd7d41baa55c043f92e3153df1812665831d58e210bd4ab1180353a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN72366298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a00d0e5315794598b919b66c06a009eee61bd4509ec0b438b5dcbd9237622d. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:48:37Z), 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/QZHN72366299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6da11357f3145b0c391c2674b13ad29ba2caef0503bea11f922a3a9172c715e. 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/QZMEP2335391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9d214bddcb10f106a8e3f3fc85b7a8a535430727383285b7677a8c84f21911. 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/QZMEP2366940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9235870443036a24286db6679a9c7ee41e39f3fd8df51cd49a30aa764630af81. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMEP2366946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00d8119da9a1b1e3d1b6c94c960c1eb9ccaed576b28d10fb6832c4477ac8c71. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:51:58Z), 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/QZMEP2366938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9d214bddcb10f106a8e3f3fc85b7a8a535430727383285b7677a8c84f21911. 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/QZMEP2366940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e7ca5266763a5c698c5ff6386246ed52afc2c2f8fc7aa32cc45238a5884464. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:24:57Z), 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/QZTB62367964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c35424bde85255b1bb63e09fe15fad6d8a2c0f2b30e7d3b073f12946ef187e8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:37Z), 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/PLC062389258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8375d1dcc6cdbed5eab0fa14459a74ec1bddc1deea60ec32e74d7a1206971a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:07:48Z), 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/PLC062389264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b80cc84361330c2a8fcdc44d6fc0f45d620e33d022adbb70cc7596a833844aa. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:27:56Z), 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/QZWFM2394302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8633580905a40f14a7501bca2b169ff6fc85b84cd13a871f4a8061c2011f68a. 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/QZFYY2428350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf810793b272a7a9d08451490e7b24f1ae3a22a3bcd6fc93944cfead4ffdb050f. 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/QZHN32586819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f80774caacb732773a25ccbdd9e28a0bac67d6945f788e20e5dc35e24f29c8c. 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/QZDA52291522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e65729b08e0cab3acd551163bd03f5d53173991eee2c1499a32cb4aa2082e65. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:35:50Z), 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/QZK6N2306280.
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