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 0xe328bd3f65a5f5ca4d256a0e849b9b2a7b8dbb16287289b6339a8753f3554e10. 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/f866c259-563a-423d-8c97-c2e0da5c1410.json and https://artists.proofprofile.net/proofs/artist/f866c259-563a-423d-8c97-c2e0da5c1410.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 0x2407292a8a6009e1024e9410c9746a6916ef2db14a3d8d1eb69e864cdb81becc. 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/USHM92036812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bb3c8039ea56c6ea123055acfe3319d9e9328c2a85ca4fb8b1054f220e5ae5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM92036814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d500d0f90828a46f786ec2994d2eba5967236f461e9eecb01396e3b0e031299. 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/USHM92036815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473aa18bf2a2874399af30286e9b0663af90c123191eada69957088f59e239a7. 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/USHM92036816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd2f9067f311926b0c1425be217ace3363b37fc332b4d3a13ec8a29921be31e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USHM92036817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac946ed8f5f0c9127a30128e3cb4036dda729febd7fa018a8df9df5984f8663. 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/USHM92036818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc14bb5bf46cd726dd0e3ad677fc5052a3d4646a60397b91614cf4386019b88. 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/USHM92036819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd235ec3d22ca226bae7842ad7b08296441897a1747115af5cab6c248ddd8a2c8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM92036820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ce35dbd28dcc897653a7d34ebca926c68cc7ca6ff3ebe91a2850d2fbf22a2a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USHM92036821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2182a4246211ff67a60f24186a7c8ea40d578352f4c1a84240157a9e42ec7fcd. 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/USHM92036822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab2a7aa867ba285864ce0ef2b0a2796c46b80812779038df990fdcf9de93a2a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM92036823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8db31562f5e9f8f489e12ee6e8d1235d3c16be3c6cd03a6ecc47ded54448c6. 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/USHM92036825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5419b7e3412b9552b113bfd4eade8916a32dc4e7ab4bd7432127bfb5f254f76. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:35Z), 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/USHM92036813.
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 0xd01a49bace9ef2ec087f467249c26263dec8a9e09a85e0da804309b8143ad224. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM92036824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0822e12f9659f1ca53af586013ea0f4fc878420e773c9c3ccec325973558e8e6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USHM92036826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3eb0d1051cf91ce72ee2cc2e698ca0d23147448d925c82f53877c6e4b8bad3a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USHM92036827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2d13a49a68fd6f4c45a3d84c558309aaeae4d2824dd60c2512a68eac8ceebc. 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/QZ5AB2309108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf2bd223d879e06ed2438d4bb2680448bc97dad46a4c5bb28f17c17fb746356. 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/QM4TX1856220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d0a5cec01906f1e9d6d45654ebbd84f3a9c3ac21e7effb3e9d047c1f87443d. 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/QM4TX1856249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94791227b17a6fd37b7518d4a016eb7002037e192cbc798c31e1346f562cd15. 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/QM4TX1856222.