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 0x6cdff63ecc61f6499b413fe3625cce90a0c193732349b722a66131766cbffc78. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbd127d0-f503-4acb-a43e-da1f1b8bf4aa.json and https://artists.proofprofile.net/proofs/artist/fbd127d0-f503-4acb-a43e-da1f1b8bf4aa.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 0x495f80009ae2e2b8e01c637c1cd48d8c4bff781149afc3cd0ad9402df5f1ae14. 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/UKJE72300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba9bed0ff008061f387492109e959861111be9d8be2d95cff0768313b20fff8. 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/UKJE72300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c88fc44b8df17619288c4ca777a1d482ec324437d9e75b35d64b4820402cb6. 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/UKJE72300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a9c336702ae729a502d68872ae8e51e68ef7a0d8ba2d72e7a77bf87a22ba4. 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/UKJE72300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cc7e6bca1a3c6d5b6b6f7afad156c14bd631903e7551d812153f40680dd18f. 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/UKJE72300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a62b6d32cda26f53a41d70d42952a019c78a461df1bf96a2ab87b8e82687a49. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UKJE72300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62688407a91cb28ce08456793d18003e4b040bb248d7737b041ddeada40e32f9. 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/UKJE72300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3559c6e258ca910c0ad56bf6197e751703cbaabdace3251d3d952ef1fe8f87a. 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/UKJE72300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38dfdfd8e1e2e7c622901b6b02e98073c808e565933552d0e567039803af017. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/UKJE72300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6754a308353c3e532856de553203783ce292965e3226516936317805afa071f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/UKJE72300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc435535e3ad4ceae11e4b32145d26415f720205d583cb5e92067f2256dfba9cb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKJE72100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abbf973a7cf26640cde9dce5bff88885e4b24a77b8df880fa04d4d5845e00bd. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/UKJE72100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f46f9207883c73fdc9bba0177f26b7ef60d436d7f024b940eeeb79d9509582. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/UKJE72100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675ea2fb7f8641fd31350cf8f00c7ffbc2d017baeeb13b9d1a93ff74e5fec3b4. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/UKJE72100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2864837a45a95aa73f01f4ab7a037f0147e9a3f3a6a50d8efe68ba6442f4213. 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/UKJE72100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5895769d877108b373600aaed3708ba0228d5b83572b8521870059586d333e6b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKJE72100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116d817612066c8a203855712dac7aa5e083d8744758e2411ce5c8c9fdb132c9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKJE72100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf95633d98e00d3289e858eed8e8fd873b58aaee9f60b303bede2d30a726283. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/UKJE72100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f46ae58a96476703254dfc8b1263b73e4bef15e1eac66214b70825516c42ab7. 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/UKJE72100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f6b3e48420460685839c3f083d3bc2ad9aeec6dc217ef653e29c68d6d6f800. 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/TCADX1860964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ab134e3e5b9d0a75223ef305643943ef9c86d49f4700ab4cedfc437cdef5bc. 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/TCADX1860966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c57d37919f39aee4ced6d23ab68ad615199a9489f7cd10d1d4c02bd367d6705. 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/TCADX1860974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0d2b0a5fe6194dfe340920232e3bc669870a73cdd3cb181fa50ea6c90bee35. 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/TCADX1860987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdefb7e79fa21d3bc96e09ee663d80c1059838c37c1269874e2185a703e66bca. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCADX1860994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcfc4d22ca9c3c11306522e978b93c59a05ff731b7491f028951e908c49e472. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TCADX1861001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79545d47c2c7f8ed8d2081c7ea014d31ca21fff78b9e24b7b0b70da6fdca40ec. 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/TCADX1861008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2663cc9481504970d5d3ba45b2a993d4811210444f511681f075abd57367bb25. 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/TCADX1861023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b7a365985c7c3d2869215ce0013ea9c78fea2f808ac7a59f6cb43523b3a7c1. 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/TCADX1861029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b0bea647758be8524c5dd4b151fdea87f8e1ad91a46ee5efacbbee1d40a183. 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/TCADX1861037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2864837a45a95aa73f01f4ab7a037f0147e9a3f3a6a50d8efe68ba6442f4213. 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/UKJE72100040.