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 0xae7ccb1feb7d80b13238bec132d6a4feb064d0e9c43d88acc48e8079fbd17ec6. 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/7d2262e5-9c5f-4ccc-ab4c-e102582b083e.json and https://artists.proofprofile.net/proofs/artist/7d2262e5-9c5f-4ccc-ab4c-e102582b083e.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 0xd01eea4e2819cb1e42c1c3844a2c455bdd9e5125d48afbd942cac26da98aea16. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:29Z), 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/USDY41701139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77475431b4076d3d9d3def59613a79f0b487d99b9693719eced4932bb89acd0. 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/USDY41701140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15b0244657ee95a46dcac650d97fa20d4aa668c19ee6c4479a251b1a510d7ba. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USDY41701143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1d3f9ad25147c320741fc5ea7bc7a2570da278ad8581b1facd5f374eccaa2c. 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/USDY41701144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15437b1db1bb8ce780ae91d659e818c99fd21db97af57ced5c01b5c7829b0566. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USDY41701147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9b580a28947239f8609ffa12d6716eb36159180101edf3f2b6465d8f7d048e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USHM81727113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e19639fd14a898dc3cef5b6df4ed9a99b116184d1e67554b491e8774a9551e. 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/QZES71815136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db3d969fe0c003d053daa6b69f69cf921ff831b7f692dc90b687ec6e1fd91bc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZES71815137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bbeace3179c45b591f46318b6e16ae65608b240099925a959c27bf818ed2e0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZDA51919901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19db988a2ae7c9d312c8edb10ba0729d638d68718897df41d72a773ea5eb687a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM21914948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0480d61cbaf7c942a8d66d26ef3569538c03b197c569ed196aa9581f40da37. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4Q1930148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1841fecd367bd7fb60945ecffdee3416977f93f376c3e46bada4389a8254db2a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:42:02Z), 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/USL4Q1930151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a6720a482eec94b0537196ee29e5e286e7b201b97d5ee91d44816c9f2d5739. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USL4Q1930154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11590c964271a82ea271970a41a20b41aace7c8c8349a23f2e1b77985ce5c4b9. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USL4Q1930156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86ab6d9f827360165ff13459673faccca8f2e5bc9274985fd870be9563274fc. 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/USL4Q1930157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82159ecc58359929480c53a01561276b067e3f75ae59d3eb3159cd3a10f69e4f. 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/USCGH2112439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45292be2bab497f825f0043aae532f7fe6e2e6656b90891616ede82ce008c9b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USCGJ2152554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857d6ff45cdc0018695c0769acd9f2a889969761ca85673f75b4dc319506aab8. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USHM82133228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67845995b627d6cf7bf5c7767d17a1f5bea3adda3820cfed357b510b1769f47. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USHM92165445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa364366fe670d719b23205287bf54b586be2cfe1b33db320717ddc6606525b25. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USHM92165448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6010b0d8133575f498b4d30f441cf7b361d745d4b5157032acff05558f9e4a9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM92165449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693f00c901c3cc63644af8270dfc517b089dfdc29869ad694333f968929152b9. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USHM92165450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102fd3aed19d7012c09a8dce08b9d9fa68cbfdc25dbe5a49144aa75b58d29574. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USHM82296837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb3bbe712fda35e03bfcc5c23dae411d5cd4cd860e601149e0d4c6efffa007b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM22387425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4e970662e612881121640e3150d051be0236e41e05313a28b627c6e5755b22. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USDY42539209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e3fa859c8c3d565f15e811143364fe3d2755e2b1e31e87b6648a91a241e4e8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:14:09Z), 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/USDY42539211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda41a7bae1b162f0997018dc9d8c9744bf1da3d981fba13c25438e85cf3d5c5. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:51:50Z), 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/USDY42539213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c17890d79531d813ebf4377070c52722c0684b78a3202b5c0c9415ccbb225c7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USDY42539214.