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 0x1ea8da11276cf7e1dcaa0d7fb9b96a928e4030f20c50661583978a9f0100dce4. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bef6de84-2ee1-4ff1-ad96-aa378fcb05f2.json and https://artists.proofprofile.net/proofs/artist/bef6de84-2ee1-4ff1-ad96-aa378fcb05f2.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 0x6f2f2a718d57c07afa4a52c011db2dd2841ab5150fc83dccfb1c0cf5701c529f. 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/INU252413297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d44e664c65ddd60c9a7e0cdd2a6a2ce9811f4d43994bd767af86428a0f4eb1. 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/QZWFR2312415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54b26bf81aa82e6425f03a0aa422fc084b8dc0e635d83f4034e15d0dce8cb9b. 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/QZTAX2349490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73511efda534d19189e5bdfd7b239ea699ff03d2798e91b7c78f4a76fca04cd0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMEM2360032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4052dcdb194122a29f4644bac401db995d05d15c521b13856eb0ed50c1e0b0d7. 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/QZNWR2184370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0707687598c126ce155862d231edb842f063ce71f529f93bc0b373680940057a. 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/QZFZ32165613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a7896eadcb8c1b5d3f37d72f80452a24eaaa056b1ac5e948b97aba9b81a83c. 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/QZFZ22192129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106d8f086ed146596f7e9ebe6a98a3a2f735f1cf2e3652400bbf492834dfdda2. 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/QZPLS2006613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0810227a76170238227cda0770a92d9d4626e34b99b8d1ef86b672e3398436e. 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/QZNWX2062187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c51a48bb7c8c7d278901ec060ec5e4e48d6c693d92019e14a938e0210aa5a21. 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/QZMEM2028703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9037ec7d89eb6e3f0b38c4393374df290e3953ef778da5484c7fbda31bce10f4. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:19:06Z), 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/QZFZ22193358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473cf4473911a0adac5449e2c287b1bd264981ee28ab827fafbd02c2d1a354e2. 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/QZHN82028091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3458318c31632b03c34d50a976297132b1c0086aa5af946369d5aa0df6d7734f. 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/QZHN62023574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd597c63ccb552b0bfbc2212a35a055ec9169784fdceb1664f9481d47f1cefd81. 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/QZFZ42088993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ff657c92b72888dd7b0d5abaea125593d3e7876c0cec6a4e4142d343a6cd97. 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/QZFZ52077357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe702637ed041c970a8d72f3cf43def8d9eb95e2fee930075f74e326ce4c05fba. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFZ22194599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4269984f035c057753671122a6550ed65f5840c41825ee57fa9a03344fd177a. 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/QZK6M2278756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7fba9692dfa745b6d0b3976e7118d59f5e0613becb73d2516f0524ba3e40a. 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/QZK6M2278757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6337b3a3334004999828c5ef8d20a969c74d8c1ec7c2bd29816af4728a81e8. 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/QZK6M2278758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa2e452e94165d215708446fd756c170e2fa532c8532a1dd80b49a59f7f71b9. 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/QZK6M2278759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bd054ff33f1e6645e4569f312fb7aa07820bb92f6b634c062f62307a0a32a2. 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/QZK6M2278760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644ec88f7dff39b644a86a710b4145e51347edc83131bf41265adb7094fe11cf. 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/QZK6M2278761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb540590467f6d2b21a3302e17a8194237655cf13398720b2799604b84977c82e. 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/QZK6M2278762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ed2754191bc4a7975a94058ae2577d81deee8347c99d58398e6ade730d156a. 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/QZK6M2278763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0178ee3037d00c58eeaa93075bf83b4799f1fdef5c8e756f78134b5f1b094281. 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/QZK6M2278764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce7f848a207cea0912d4955575ee413d4acc0e3da3fb356967f4f2af7ab12d9. 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/QZK6M2278765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0f0506e40dd35cd3adc0aa131d9d0441953241d73422bb990356b9e496d687. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6M2278766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787495c29d28aed4a8e9950732ebfd95b66a99bc2a45cefb66ced5fb97bde6d7. 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/QZK6M2278767.