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 0xc8df6fd1911cdc9adc697f8ad5ad3ff9d9b6d3577f440be7d69408d129b7941a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/537717cb-166e-44dd-8b7b-ff0b67403010.json and https://artists.proofprofile.net/proofs/artist/537717cb-166e-44dd-8b7b-ff0b67403010.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 0xf28957a3718c01acb34891efc82f2baf44a579f9b8a8f9d02c2fc7b9ae9bfbf8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FR96X2064417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da6add48f2d9a63d9f5405f6a3847a7fd5ef68ec97e6b1a1470bde08ea26af2. 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/FRX202000669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973d76be954cb3a5cb78234870be620555dba8fb5f25400df6bbdf71dcf33530. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DGA052060045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6efc41054b6eaaacdcfeb230071985a76c4d3588b8a467aefac61831044b46c. 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/DGA072134421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6947b458b50f4e3c5104013266e143e4431df9f30306169e839118ea6e04b4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA072134422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284cf7af142c60e98b06d3656602d325540923807ccf0a8ab79d9f7451a6d310. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FRX452117667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa608d82dfde4efe32c9f83cf6e034f8b044ada438cfb70fc2dccefb46496247d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX452195765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f940826254b6a7bdd836a220b7f56a345881b8a6d6beef259303c9097f18e0. 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/FRX762183185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f1638226a3aca258ccfeea9dc57baa9ada8ee463f635645c94aa9b501e6c23. 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/FRX872154951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97aa25064a2de171721650e7fc7c736862d6dc15d61ca558d09730b2fe00ae9. 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/FRS182156440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb98ae17273bb493866fc0750c6f0224cc0c5a7cb572b753e404495f8e8c756. 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/FR10S2230315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5654d0d565a86948e58fcce6a12ce865dda91acb012d58314390daede788b2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:32Z), 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/FR10S2233452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f8f5828f941fdddf52cf95d884c67d04c77e598e7b1abfad406186440416c1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR10S2233456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0199450b48ae36e6fdb50aca2cfd74fef1fca7e4d7036674d987f3f3b9bce5. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/FR10S2233457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2120285e19929c329295d0bdb7b260a640d28708102e8d6212b421251c0cbb3. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/FR10S2232106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdac2957133257638f544c788cb07792c693ba7e197ee73c523ce31a25b7528a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX282242350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f62dd03e2b8c68f872f67a9ac7b8ecb3cb767a87449e606ec3976f73485488. 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/FRX452253617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae7f3d974b1b70dfeb240f73ca4ccdfdeec190817260854fb0ef91ca0c5c528. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRX452253618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68491ecb01f25a03204d0e4d2dee664c7d4120ed7885649545afd233e16d201d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:51:22Z), 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/DGA052271614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493b5ef036a160ebeade4ac3588fe2a47aacc971109aab7ef9d76a7f8229c77a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR59R2326069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328f4f0e42e2890642caefcbef004740ca7b31208ead1ce423d157790b3e3128. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR96X2395395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e2631519dd197f2b3dcae51a6dbfc4d83319ff7cc4816bc3a4700e7c829417. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR59R2425610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f32828cef617b5a1dd6f1aca4011fd66616e32c243d353a7aec51fa6f21872. 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/FR96X2419232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607d4d014f15439e3e15094bc2c04d56fde8720356a5812171faf4fef856d0c0. 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/FRX452442910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2efefd4dd7f105b9b615c6b8c996d5e88847ba4969d9cc32abe521467abc20. 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/FRX872442218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa2614efdf5e46b54ce0ca2b2b46a20fa18dfd341738becf0e1d5bd72526079. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:00Z), 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/DGA072471721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6aef3b776e34047f339d591c01a760f828b40af5d0c517012af7b4467cff5b9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:12:50Z), 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/DGA092422605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5b2664d251b345007d80b0d3ff45b374e2d0990166299bbf63170471a24c88. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DGA092422606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0211d9c62a13306d2eb425f94db6779ce1a3b1d85be513b4cb8b8cc76bb688e2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA092422607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e2631519dd197f2b3dcae51a6dbfc4d83319ff7cc4816bc3a4700e7c829417. 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/FR59R2425610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77647fe4ad4657b5ca3b10f021ecff88466f9544a8ca99b0da7bc7556e58be36. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DGA092422608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd674a2e6e0ef3ece42902e396d10362c71775f04ab78efbeda345f3ea740be4b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:32:58Z), 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/DGA092422609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2fc49122ba437aa831f2ae3262b48f38c7155776d221360bea54c0aeb5255b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:07:12Z), 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/DGA092422611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ca35d90e27e0f2e041da7b6575710c063028125419c17c6de8b45daf9d5ca0. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:28:10Z), 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/DGA092422612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607d4d014f15439e3e15094bc2c04d56fde8720356a5812171faf4fef856d0c0. 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/FRX452442910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009fd185e6bb0f5a436f9fe7dcec564bb309705e880e2a0f5e94e6b9e13ffb9e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:50Z), 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/DGA092422615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558bc99c8a8262010a7ddf3148c4f66080f0abfcd7eab117b17c470ba853115b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DGA092422616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8415cebe9c6866d99d64bf3448a248f4f683473b5e313edecb8eb776efe61422. 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/FRX762027058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b73d4bc8cfbccdb04130ab7007b7eb4071975d5ae13300e8b7cda099d81f2fd. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PLS282100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b60b6ba13d4c5f1a8b0179dcec8d2ce3cbcde342861110a994088b67856c51. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:13Z), 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/PLX971800001.
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