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 0xc556015824c338e1e061461cd2edf41907b943233a794cf76af0b4b7805cbb40. 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/cd5083cd-531d-4a78-b114-a5daae3ae89f.json and https://artists.proofprofile.net/proofs/artist/cd5083cd-531d-4a78-b114-a5daae3ae89f.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 0x256a3d87329fb31d94d29a22e982ba0a5085981cad7637f6a01e73ac0d94cf06. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3DF2234327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25240338ce9d072999ae962528b99e18e46aa07051a43f28b802dc478cded1. 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/DEQ022260439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65621bf049fa6aba66a3f03ce0b8d607133c77353c0daedd2da33071672d7b51. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:53:48Z), 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/NLX9G2200222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8551d3bc7b5c56056814f8a85b182088737c79e07c652adec07899ec1b2d5e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:01:09Z), 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/DEQ022291216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f69ed527e93cbe4bb7b0474e3e83cf35de709d5824888202fce2466b9c4459. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USANG2201269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469a780d0a68712ce7205eee753272b6b57045189aafdbc7dff68ea7b2b67f93. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:18:16Z), 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/USANG2216562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a871bfe0684f9f5bdd6d7a20b67906fa949923b6614420b06c36a35ad59ef0d. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:16:44Z), 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/NLX9G2200273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e6a37d953944c85613cc562c6b0ed278f9f03552c95f637bfe23dc1b653fc6. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:45:12Z), 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/DEQ022284770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255abb3fc057f5b2b6b9b39acd6b14535116f5fcb070ee969159f76b579b6648. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEQ022292060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fed308cd0cc5a42e32c01f9f306dce55e58da47eb6346afbb6cc928c0a99c9. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/DEQ022390048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2e1fdfe66e220c84b6d8990d2e972a4c660289f558fbc4a3e6ed93d1457cea. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USANG2266340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1a8ab1a9e0eedca7bda6223ec6449bc573547fa2f9abf14255da02853c2a59. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEQ022381659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f29c0ce9d7cb9f0900039091c5bd863b81bd49883c01279cdb925cae4a0f269. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:56:29Z), 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/QM3DF2207709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf393758b3af801b2772cc42451779aee4cfec070f3c093353e34a17ea61f1cef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEQ022372062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb63050f16c1d8498e902985ec69bbf15a13b07375679a80c4a6cef787fa0de. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USANG2291671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8dcca56f25e5920f462c03f916e777473bf6effc2275c76c73e25c5f3e8924. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM3DF2275792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce2d390fb37e3fec47c1b27380f8af596cf07042b14b8fb2823756154de806f. 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/QMANG2213276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f9dba9e91bcbfd70c09e4f6527295203df5ef53c6c049d8c1afb424ed555f0. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:54:36Z), 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/DEQ022374708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68218039b762738904ead1154ed49fd1f92c93491b8fce730e1d05d055713c96. 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/US3DF2409275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4685f8cf2ef8040e07509b6eefbdb109e469e2790ed246a942aa2a1fd51ca120. 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/DEH742409202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebce39ce445f277192dbdef7cce42908e1a7acac3a4770df1533b3eb01ebb42c. 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/US3DF2434990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6674883415d3c801df3848179563c05b569c8422df5d29878fbf40e31b918959. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/US3DF2473047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e8feaa90d2b5f7b7878f75573c2a7449d4aeb5e876bf227a9d3d2cf04fd2dc. 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/US3DF2476546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95acaf10f4bfcc781916bf899b0e683a527f796393194065512c5420b11a783. 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/DEH742425832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b09dcfcbcce88d49a8e3700234eecfa7437946feb2cb90a8a9e9548dd9a6274. 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/USANG2447285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef1d1fd8e91a19fe5b605064cf32c1577580a1c96cef092e13a433abbf3966. 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/NL4YD2400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7f5019022a79825d54d2688c95824db3db8bd44168309032baea5f5132fd93. 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/CH7812420043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12a89d70d07c58a1bfbcb8fa6e62b947dc0cb67d5cf80c7d1c17cfe3e1dfe63. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/US3DF2582698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a680e6c11b413376e45125467feecb95f548d169e8e3deec93ed4487d7cb302. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US3DF2535916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5528d0f0bd45f837f696abccecb61e3f1ec4ff8af35bf3abac6a37398c9df2da. 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/USANG2411724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b189f53528680b5b3bc585a89df392e133cdea58ca0566ff4aaac0e158a184. 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/UKZGC2407684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e9a2a15f316fb8ab4a5b9fe99fa5fa6eadc632f65c7bb409730ea644964857. 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/FRX762489607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51e809f0e92fbbd3af7680817672a868ea2de4e8e24481cc3ceebdf95da9cec. 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/UKZGC2308326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f335d8066f57723e7615bdb6796df3f15def2c388f1243daa0613a1fd32d08. 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/US3DF2509323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1244bb0f5bdbf4c80205d194f46cc98ab1a69a9bc18aa3fe58ce2d6bcd947a. 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/DEQ022383168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bb23cb24776a0f1b67d785914861a29722f725b153bbced74e41bff833be3b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QM3DF2129412.
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 0x57515f785e398b05c78a6ec9b82d3dcddce15c777d1f748331146f50a48519f1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM3DF2202940.