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 0xf224eec9358bd14fb555621f19b9d2e8025078d0a45bd49b62b19f88bd56fd43. 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/00f36302-c454-4a84-985a-dd930c9c5bf6.json and https://artists.proofprofile.net/proofs/artist/00f36302-c454-4a84-985a-dd930c9c5bf6.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 0x076ccbd628f1ca60410549e67491b22660d749f7df4592bebeb9e52f7c12719c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCADJ1761147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e322a3d507f7084d23c1e2116e5820208f5f231d2e31bbfdca8b594f91561ff. 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/CAHQJ1811135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd84992f2322fb73f72e80193e8615581d5ad66e9e2b9e81cfa5aa1a93de566. 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/CAHQJ1848263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd556bcab491343832fb3605650e6e6cb5d304de921d61d11cb2162896cce2553. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CAHQJ1906603.
Tudu (Infidèles) [feat. Jessica Loraine]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a23072e9ed9a2bbe2119c0a2003bcf9dd6076b10927639c6aa479559d1315bf. 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/QZK6M2017309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa2d355eba89a2b2ddf910a7ed0011edbe322ce82d120bafa6ad38b60dbb1b5. 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/QZNWY2032477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e308f9f8ca450baee068cd474c88b7cae5a7469c870d65e43ae605aa7bfa99b. 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/QZPLR2061475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f9823eac0f0037480ea64091a401b596bcb26f416b4c9f2be93cff72536eab. 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/QZPLR2061476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e0ad90f185c8c887b073c03a4bc56cd7279be6a17f7ad84b231177e9007431. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZPLR2061479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5a0428602dcefa95b3cc32cf9cf4bc286d78390d6a716201da49696bf5fe41. 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/QZDA62107214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5124a3bf7c451acc219979514651824d72b477578486378d5d88d82df22c4940. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNA2144104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd2787dea20fe8e3e0e070ce3da4bc689f4d120385132a311d76b3d98973be0. 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/QZES92274188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50c66125226af8365c2bff22b47c0b4472852c351dabb6813229699081b41fe. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZTB42237564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894558914a2ef84a0f1e616577853cb3a59353c246e497aebd2ac985c72a269a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ72306624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc440c0ff9f88cab47f85002b68228e849d32ea3ab58481b4dafe5ac4914e958. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZTAS2313200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0a160667b82b1ee5d71c108ee280cfd3c7955b24e7367220f269d625133c90. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZTAX2395573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc4beab58d5693cc0d1fade67067d2258c7a061a49f92f0abf53936462dfbfd. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZTB72398852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0624885c1b085be537c816a31287a8e1da2e1f3cd3a03b6f7bf516f1398850. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZFYY2451357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa22bf59ee17052de50efafb50b909d94a9cce8bb76c6f86d2b7035fe564d9bb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA52423954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1be90fb4ff2d345d098fd893aa34348447a5fc7331d12774335dea392476d1. 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/QZWFG2402006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6e274eec027719e90aa234952199bdd9f994845eb3b37aeaf1fbc7a6ad8ba1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZFYX2541405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69711ba85e377b1a8130dbcda162a9f7d517d70043640db4c300b34340cfc4fa. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/QZFYX2541406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56574421ce99c23b50a2c09ea4f384e9b73863c108eb40217d750cd7876fd8ee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYX2541407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa132ef7c4ec1efd488e410b0646d67bf886d7002441f9d2446d57fe27d77d8f8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYX2541408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463b4b5276e4fbc91d3ae965c75d926253bb14a38d695eb9de0189cc8fbe101a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYX2541409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941e07b5da2be1be67a0fc85e05cc7d5d3bbb6c53e610a1ee5cd35f0cfb751ee. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZFYX2541410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd262724c399c152d2e2575ae36070054a6a2db909983eedb211f32c157c879d. 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/FR4EO2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474de629a04d1ad33388b54e236a21e674ad08263094f187a8ccc6f60a432295. 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/FR4EO2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd262724c399c152d2e2575ae36070054a6a2db909983eedb211f32c157c879d. 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/FR4EO2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474de629a04d1ad33388b54e236a21e674ad08263094f187a8ccc6f60a432295. 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/FR4EO2200085.