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 0x4c542197b7f801de0604965201ed86151e44f9e69e56c1f93881a9056a645012. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d95d545-e433-4e1e-9f2c-9b9654a07d5e.json and https://artists.proofprofile.net/proofs/artist/1d95d545-e433-4e1e-9f2c-9b9654a07d5e.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 0x09153aa11062aa3a0337df4b0be1113079d01a314597a2b2eb37b64f5537cd84. 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/ESA012053364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0161dcbc834ca3e84cd9aaf04aa548f832d00e3ae77c71b2c36c484814038d8. 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/ESA012053362.
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 0x88abf2a138f92cc1881416e0801ad29426b0eb65955b5c69a1f19b6d957386cf. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ESA012053363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeaa0f501c6eab518cb8a2018a081bd4dbcd60ccc7d7af082c10aada3c44b29. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/ESA012053365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063bf89f021ae5cab5d63665280ed27b8bb80985b8480aaa40a1144caf098efc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ESA012053367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821788020522a970defee397eef019763a604a1d77eadb5cb031821ec5a0d887. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ESA012053371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8fcf07f54c0731d5573039202d440bb0d38a289019c874bb0adc3e6593db24. 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/QZNJV2083085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171098112c5aa48542b2dfcfed38e088263755217f954339624601f78a98f8e6. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZNJX2007000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ac75ce38996b5f7c73bf3353d3af6bf9488dff829c2867fa9bbe107f623cff. 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/ESA012034042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2499ef370b52520b9f4e7fec393ee49450ae1faf8b8bc24ca0c279d1c84f608. 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/QMDA72314855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4d561643561428f6be11e91bcdd35d0b503df3b198e9b10a1c3c70eff1d9c6. 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/QMDA72314882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2a910242edfbea968a8cb481ee8ff1cfcafdbd54c041a81716d4c6fcbc9ec9. 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/QMDA72314939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848304e2522cda4d56da2fc13dfb753f11f6742c4806047505a1af1a638a8f2b. 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/QMDA72314998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723cec9f347339dc622ac1559cb2e3f6d3989f3a1a49e4868151e5d762384a98. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMDA72321401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccb7da17bb2f576cb39a29d86ff5374903cd6901cdb78db7361548cfbebc63e. 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/QM4TX2488134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe450dd429a5d45ef9101270d77d4d006682f098dfc7eba95218fb8ccc51c14fc. 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/QZTB62428967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4c8b3a9ce2664b70a33ca0443a19afd6fdd3df187f21b2c32b0aaa269d1285. 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/ES64E2202230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa803c96a3ebf36f1a30ff3af9cf4355448eb03aea8828c82737bb144b54178e1. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZTAU2177628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1313892875deaacb0313e1f941678bfe795451800309d925eebdbda2bf98743a. 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/QZTAU2177631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33da73e8c1ae0a12f50a8ac5cb40e9e70e6e92dddf9bbc316453d875f1de75a0. 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/BK4DA2426122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa1c4fbd702f17380d55914265ec870a431eaf8a1703454825ebb08dfc06839. 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/BK4DA2426123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc8052bdbd686cf03f7b3ae7de85776e1ea3fb27c7affd79215d3152b4451b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2426124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edbf81d26934a82f0d451bee9e0f148babe3b31af405639ebfb508d855dc730. 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/BK4DA2426125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef1b12e89164d0758566f5ac0056cfdbfc10f55a7f839c0278501bf4b80ede8. 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/BK4DA2426126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668a5268fa55221b1507ecf618f0f2a3c61ced69a0a48c0f53a3c6c46c33efb8. 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/BK4DA2426127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcc1b2514df70b26a122d4785c8cf7b9135dd7130092e4b0ab7c9b9298ef7e9. 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/QZMEQ2006007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf2ec5b22bf29aec9dc53b8fe0e113ab6363d4f134a1736526fa5832823bda9. 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/QZMEQ2006010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a14f54a5314e950367bf67ae9a744be274390090feec8839651faf2c5a19a7. 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/QZMEQ2006028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34100a526ea4df425db29aaba75076f2852b3ea69aad39aa2561c64bbea1531. 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/US7VG2558668.