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 0xf776eaf3fad75fd52703754f02a5f87c6e1df8ee3afc1adc3f230c126c896a29. 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/79d41516-19bf-4dbe-9db2-b1a912b1dc12.json and https://artists.proofprofile.net/proofs/artist/79d41516-19bf-4dbe-9db2-b1a912b1dc12.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 0x31d01cec553a8f0fb753b0002caab004785583f7440fa26edaa5ca751a333b24. 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/USCGJ2518767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a5ee8efe745c62eb40029c850bcb69c64c8323ad8e02fb939a928315de0d94. 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/USCGJ2518768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fd849eb8dbb67245849e2fa83dd49d3c9d7d761ee2dd0b91acc2c11ca3c338. 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/USCGJ2518769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863a60d639ea392634fe1dd797ee6275d12e23166454ee0826f82e636d57e5c2. 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/USCGJ2518770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c30caa481f7796a45f8b91f4a6e751eba094c4b6628a4666b25bc432ce3b1db. 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/USCGJ2518771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ea991fb6e62d1c476619dbad4ac2a70b3a1de738fe3bce17079534415263d8. 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/USCGJ2518772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f32d85b84d88e1aeead143d711ee60ef690099038f53b2ecc13c16cd398db2. 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/USCGJ2518773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3c530bf76ca628899b7dc7eefbf49570db8a928fb461f46aaae5fc888a1c08. 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/USHM82344603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa567f58314a1a052b4ab3801cc75d9e3cbdfe1038278953f4056b9ed135b8b04. 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/USHM82344604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae538e35e13fc0f09dddb654decaf1d728320b0881f4d24247f09b654c063819. 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/USL4Q2161292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1fd7ced83ac0095db8a720389202e6127bfc86635047fe1437f1b24f353d90. 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/USHM82344605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc271974b5ef876013be9cc41437f42aa8c814aad0c73019cde8bbce10789eb10. 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/USHM82344606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722452a7e16b9956ba47575670e5efcf1496d0b7e89e88e06e4311552c073282. 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/USHM82344607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fa45df385689a6a72e23511640596b5f4b76246b2b04729200dd50c0fb56f8. 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/USHM82344608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5d4a9bca4c30e804561a992b0874f316c175e4036239eb4c82f973ff1ac65b. 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/USHM82344609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3522a554e05f963c3bb87d751557247ad808c6e553707e9770d08fe4cc1c61b7. 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/USHM91974119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038c3c1dfc6077a79fb2f8036aa5f477e58e961169c72e130bb65441126ca609. 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/USHM91974120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f51974a393d2d9dcff0981ebf38d41de617f51404c2872b814dc1f6defc7e8. 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/USHM91974121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede0b69324e4b3e83097b67f1b47557f6b602d1ad5ffb1925a0416fb96d918f5. 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/USHM91974122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7890b4df70207f74562c689567ccf0d996bd8e9f420156e5f5d4c5f85f8d5b. 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/USHM91974123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98669a76eabcf787c4afe8ec2beab3555e4772d0ee4d6cf94c5ae0e5c45a41d3. 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/USHM91974124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496023c617e89666d03b5eb5596d74b30943c9d9026eb99f076fa7ef0cab8af1. 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/USHM91974125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6684e35ad6a80001291cc39e3bf52c54bf1042ddd0f86802f6b0aae1ae257622. 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/USHM91974126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099c837d3728fc2b1db3ef71ab96989233c35913502c40cfa79fce48ea405332. 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/USHM91902692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10301963bcf1e5e07022e111d4e1d4677b1cf61e99ed95bfd0aa876adf6691f3. 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/USHM91902693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0cdc12c294dc40de5f3b90d75c8624c7055d0447b2ec22103c62cc04a4267e. 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/USHM91902694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7baccf1cd1b8590f3b5c85e03999af4b81e3dea783576b7876c9cc25b3f9d4d. 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/USHM91902695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949c1eaa5c6a7f1f97942c917fc3f1eec324d0d2e9bc97f0f70bf0708a7e5e5f. 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/USHM91902696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cbcc98d15b4d15da5d28eebd0c0b8475ca1e21d52249797ea2e26936eb7145. 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/USHM91902697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7628a102b8230c51322170929c3f6a8a2f1f3c8dbec59e29f19fba86bd59a7. 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/USHM91902698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62346b1562f478114538ca3011782e791284c902c3786c5e487f39035ad0a6cf. 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/USHM91902699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2905efcb470510b870c52fde766536891cd2ee60fbb9b54eb7206aac0104925b. 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/USA2P1919443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8cb75c55f2f5ffb218cac9c1993d128d0910e2ef0ad47be07398325c1bcda8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P1919463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46606b6d7bb7823d9bf4858ede37aa7f7474762883423ea1b39b8fce7831f7a7. 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/USCGJ1807838.
Universal Mackin (Underground Recordings)