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 0xf473eeea47568eefe9fc656c4d86ee3d8bd4f9ac6f078ea162d27362c133bf9f. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9eb9dc8-0611-4930-bb64-ce785fd1762e.json and https://artists.proofprofile.net/proofs/artist/c9eb9dc8-0611-4930-bb64-ce785fd1762e.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 0x755eabcf8cdc0733f4e6095994b4b07661c6235b3abfd625dc581d21f4583c55. 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/QZHNB2276759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3f261a5500a2062ee3dbea1f0011c870d529e5f87fb5437e77552df7a95d3b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNB2276760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c7eebaaff10deb9519e94e537c7c3bd96cd1882397ce84cf57f62abbd10835. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNB2276761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08aae033fb8e6aa3dd8fe431b83b025bece37b3cd54c1cdede9c30d97f76265. 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/QZHNB2276762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea9376d6d73c27b0ffe1d70c31473027ece2e7f118e4afcea9f752d45604e48. 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/QZHNB2276765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddf0789ff08700e198362e41f8c2cbc5b2f9f95ebb126d0427eb96d2d2e7ce9. 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/QZHNB2276766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057e2dcb3546ff20ce71325588542aec3a2b509da36715d1f1d10c7de6acb17f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR10S2140085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36cd157a5ccda9176e075a39794a0488d85b265eea25f148729975ed9f45d30. 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/FR10S2140086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8fe12cacf6cd6ac17881481570625b73a8fbf041aa1df78118ec11a8c7a8d6. 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/FR10S2140091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c205576a83adac4e1a5b97f580361965b1f2e793ec55d8c3c4c5fc8185b7fe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR10S2140092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3161529ed6f325dcc50adb9c7f3ea836f140e30a1299b699ffe64927fcae22. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS7J2340936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcace6e0c9c2ca1589d382cd3e52769020de6ac47d9adf7647fda7ba55a68792. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS7J2387858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e33fc2f34feaa201dd6098752a4edc8ec7ddfff71f4eb93bf66d2f196962d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:16Z), 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/QZS7J2327017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3161529ed6f325dcc50adb9c7f3ea836f140e30a1299b699ffe64927fcae22. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:22:50Z), 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/QZS7J2340936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9dda68488086d695d36e49c6be33552e1192df6babd2b37e8ead1d362f8495. 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/QZTB22348214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61fc74b8a6a98dee0cfaae8dae29c36d36f64b4f7a1d772c90fdd0e86ec14c5. 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/QZTBA2394769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e69a475c048685a6c62c64ef611412d1f76748d06c1f1ee6a3419ca449b9fc. 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/QZTB62393393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae12fd0417f588839d4032d8a67a390ffc80998a32206bd17bc13c34a0f0ab6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTBA2394771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577e0469ef46034e6de6923e75593b1efe81eafb9cf57877155cfa21da71c563. 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/QZTBA2394772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45ca9af47ae85e9fa2333e8b9f34c455939090bfb83bdf0d4ebb427917ca513. 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/QZTBA2394773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1508465d76cd3434d3225f2febe5b3c7cb4e53406587a6fdd1f9ccb88488ea9d. 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/QZTBA2394774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3aae2fe0efbddbd0ddda47b9f1859caae9bb735acb7b324497c9c73496ce05. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:55:23Z), 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/QZTBA2394775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe884df604d435600c7fba3683e2a45328e391f508ebe1081d0cb1257a1f8a59a. 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/QZMEN2481705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e69a475c048685a6c62c64ef611412d1f76748d06c1f1ee6a3419ca449b9fc. 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/QZTB62393393.