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 0x733b57e594e52caa1c6f62353baeb29f75379a7e207246b978b0d94cfa04fa14. 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/7d54e00b-9f4b-4dfc-a1bd-5a93feb68cbc.json and https://artists.proofprofile.net/proofs/artist/7d54e00b-9f4b-4dfc-a1bd-5a93feb68cbc.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 0xb7d8ccc55e128f21f9eaf766173a9b612107e5a7590c686adc8197e67666e83a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZES51868906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6421ee2984c463f6f5c2490862c90ba5b70c22a9cd94fdf71d978cd0d640261. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZES61841842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1c5cfdac4f886a02bc85a93e558ccd0650f1c3eefd0b5a41697ff5887a1fa1. 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/USUYG1321272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c3c5985fd8aa5c124bd80dc3c9791679b60da9511a927da6a1108066d3a024. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USUYG1321258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9afbac053793dc8a116e31161b5f4722dcd282e3f9f30c3ad15bc2c0ee50f5. 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/USUYG1321260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4012a2a0723d9fff05a755c123b16a446570ec04ee5213f4d4b0019cf0698104. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USUYG1321267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722e680031b98cd55751350db32135a9b0f3e78c82abe78df4eefc2c1bef6301. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZFYZ2063845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08421a80521973a8ca2d99cfc75893249cab61f28e7c183b3ff959708013b56. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZFYZ2063851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5785c6446e586978502d077b16cc110b75b85abca5c17987e34dbbd29f75ceee. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES92049838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cda8b8e05a8465018faf44d82bd980ab9dfdc0cb92a009dfea452c99567db5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USUYG1348057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862a9cba29bf98e22a4ea2b93c05980be077c870a15b1ba0a5e9ae5b1a2e52c4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USUYG1340808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb76d09a2b1e99f2be12e8a527c5e632dfbd1aed4dd9632ef2251c73b93936a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USUYG1423939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0af039b454f84bcdc9bd3357f05d4f5c640d58dfcb27fc3782daf5ac3b84af. 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/USUYG1428683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2bca5a8f2ce1e57ca290b0a38a14bcaa8f71f66d3d658fb34810a6e45aac82. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USUYG1438791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616d6d9d758f205a4bdaafb11d99830b7314017f99147c7f61f0e2ecd92b0202. 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/USUYG1438792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7d59078f68b396d07ecc6b5c616ce0290c7c4161628f27092eca17a54a6d4d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USUYG1432130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d147be14b0089204a4aacd592fa469420b4558b271720efe6d264567077d1d. 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/QZK6G2506437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d984d335a5237c0138d757d586426da1d81b455231f3271679675b502bd0c0. 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/CAHQJ1883787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac52c530cb9774f04843b5c94bced3610edfda2681bddcfe4e1e0439b483aed. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZHN31921736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05084474034f313e142da684c9edf3bad08cfdc018175124102d9205951f5a43. 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/TCAEO1956441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c7dc0550bd8641d5e53c74b53b431f8e957964d39e12325e4a1410c4b09150. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZK6Q2377959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b87059433d4bb429fa83428650b4df8012680d12af22fb4c6afe5a555d5e521. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZTAW2203221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf545073eff1ee4bbc7ee0292f2484cb1c7fdef93b1f0fdfe988688f7a3489d3b. 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/CA5KR2080207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0487818b8dff96f852f5c4f3fc9900da0f58c1b186e60cb419c1f67ffbe6e5. 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/QZTLA2466415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53cf4fb10efd318957caef66720c26d1671978471170cf80af75b4ecd1d9e03. 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/CA5KR2072976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f4eb662fc68347b0326281649e10c36d35b08810ab27588ced192126fb7594. 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/CA5KR2072987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7cd6ee8d2c9ca4a6d1fd4419f75d86a5a823f25d9ee78a2b21f2f5abd747b9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CA5KR2072994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71395f207125949945249d5109eb13a0757940674fa4cd3fe19327ba694983c5. 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/QM24S1910279.