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 0x23ae6df41380df653a1dd99ec3ea491e2afb9065074f6a670edd64f938e18832. 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/11941995-56d5-4c24-9434-fcca798ada51.json and https://artists.proofprofile.net/proofs/artist/11941995-56d5-4c24-9434-fcca798ada51.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 0x49f7cc7aa3b94ec33d25c8fb96d5875f8aee2e40bf95413e2d2954d884890c33. 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/QMZTB1600370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade066324179ff0c43c73445fdef267a7294766a1298bed1581650bc04081ee9. 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/QMZTB1600371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e6cab4dbc92fbb6d1bace8d629798174c80eee4a0e6696346fd628a67c4cdf. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QMZTB1600435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c8c2de25df1aed16da77bec492a93d019e6be0de8fd172b03cf8ef05dec5df. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QMZTB1600416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f0acecd99c21456a707e3d28312feece588582ae84059045c99b04c7ae1558. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMZTB1600418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec5b11e29c76693f30630916462fe0e6a998442ee715dfd0df46c57d6bf3622. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMZTB1600420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89fe5d80bbf817fd4f3cf66eb01e9d81063111a4066c9437f42966646441269. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QMZTB1600421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00216dd6da93ce5af61a5ddcc6e55a5e3024c7c6124f5c4ece1c93d6c68c71ed. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMZTB1600423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6817cce78ed0b06d305ccb7a894fbe9e9491c8e7639810ddac7aa60217988934. 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/QMZTB1600422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66b4ea2753ba5a8828b29a7ac798b54abbbd6eda69b6e34d106ebf3886144ee. 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/US7VG2031776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf98bb46b008fcfaeb78da3042256f241d5ff1e0f23c50a8bb60496a8e339430. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US7VG2031777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4fe916fa3770928c7701b0e902239936a2c88958ec0455159d2cfe4a753095. 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/US7VG2031778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b170899ea202e67f62b3de7dc428a7f882c7fe7ba548a28425de8fa5c878e20. 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/US7VG2031779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f843754eb01b67be73b7afa3260bdc84f7c6c1841d5941520d99a5cb40c671. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US7VG2031780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bad9862874a61ed07b19d04fdc9c676af07ee8ec7ff851384ad133d22f69014. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US7VG2031781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b9ea5f35e7a651784ab1ecba51d581ef2ff27a988986e33b8eccffebfb99d1. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/US7VG2031782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b80146a25c4ba2477f4b4b9f22347d5dd2f06dbd95493d050d6c9cb658313a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USX9P1302324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42688270bbaa8b63cdf36ec58b4b7d4029fc1a9e9e50a2810b8a4da9c3cbb0bc. 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/USX9P1302325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af26a7114a7354460f3bfc1546519e9edfa4cf56de30720c826b78850a21212. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USX9P1302328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec5b11e29c76693f30630916462fe0e6a998442ee715dfd0df46c57d6bf3622. 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/QMZTB1600420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c8c2de25df1aed16da77bec492a93d019e6be0de8fd172b03cf8ef05dec5df. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMZTB1600416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7bc619f44a03f7245d732033475765361d005f5e94eec0b491e5be286ad04a. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZDA51857587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b3df4efc8abd54c1317ebe4210a1d9519419f8c754a996343a944b24d6bdfa. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA51857592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c32669005ecc1686a1e1cf9df9c9b571ad90665227c66991f2221f6d5f15ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAER2088814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb70b833a232364577882ef78bd9b2446bd599d82943abfc334db6fd79072eb5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAER2088823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6844cecfe0038194183f5c2638287e942f82c4c1f738fae11efc58e71eb428c3. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCAER2088827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99c0b322c10c1813fb265b54ea9ff683126581a53e0cdb3b029e2a0ba8c93b4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAER2088968.