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 0xa9303bf0e5010b3e945a2453cfa27fe48a850337b447ca328b9dada2904def75. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54e7da9f-9521-4abf-9e52-b9d6a2cae4b4.json and https://artists.proofprofile.net/proofs/artist/54e7da9f-9521-4abf-9e52-b9d6a2cae4b4.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 0x057d0525ea1504996b00891ce27b333b05284da2b8f94328af3da8f8937de487. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEZN82504700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977e8f00d1946817a64aa9293445ebc32633b2c28b6474204040362c4fda2627. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEZN82504689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83da145b644c59937a039c96153826dfc8b1f8b5664eba60597a426aafe88990. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEZN82504633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbebcd1d147ec7e5260bb8cac52f3f4c9e77512a0756465b395c09f347b5e38b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZN82504625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1464f7d5f520289874a0182aa54fa551cb99a0361e9dab6240fdb305ce60ea71. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/DEZN82504629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b401657488317772fb8db757d4dc978fd2dda300fe2c224e435715ef9936160. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEZN82504635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0475daf5fe1a73336cd3b75e466ae7b3d0b2bbf04fcadbf31b9f8efee6d4c1. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/DEZN82504660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d99b32e4070cf52988ca67a702fcb1f8b9f37782d22af4ae2db401973ae1e77. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEZN82504584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b53c8623b54b1649027101669e18c7e9724e798304412f1801b8384897499e. 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/DEZN82504690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7529cbe8420fb385f3bae75f0fba19418c5322c65ef3b8972f1c4e4c6bd03e12. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEZN82504649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771690efa84bfec803207819101e55730792ea544aac418560b38062b7a3a2d0. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DEZN82504627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9ce578565ec319c80da4f36599c9e2a9252ec69c7d0889ccc05c769df87455. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEZN82504692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4f0a77380025fca4ef3e1dedbf9d9d22ddb4d20ae7bc1c25a8df1481e33452. 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/DEZN82504646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5050280cb3a791414f3b972daaf167f4bc88d8b2139e9809a6eb4147809eea33. 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/DEZN82504620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c0c29ef43a4aa9d73cc7e0bec98e955349b4b6312a5284a0da9fdbe394c5ec. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEZN82504694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd029f4ef96d12e6291d0b5a81e5ff123141c26bd21424bb053e7ad09aeb3af04. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEZN82504661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe513f54553bc88f2ed0bd4787ecf72be190624c4524f60b03e45a97d0a63012e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEZN82504699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc895f97e881802f806d47270a89b486f86b1d9822f1d10e991bbcc200bf8e0ef. 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/DEZN82504693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606664159e83b38126592fcb3548835dc623067d3e8d400880d236dae988f10e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEZN82504655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b20bbd5ca73a10de0cb31e899aa3531e14be0702a0cbc3d598598967efa9402. 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/DEZN82504691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fd951bc214a976558270cb9aaecc8bdd1625c1feda1bccafa9a1578c924502. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEZN82504657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05a6fd2a24d229d8d9b151aa8fdad8a2bcdb39989a775df20904a919411bd75. 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/DEZN82504631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232ebb40906c39108cf58312786928d1cc8e85503c753ef99a05133013b39183. 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/DEZN82504622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e415b7c246d366b70f6b5a4e4eb2da13853e2174722138fb8eae86ed3e829f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEZN82504658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32041d6a57036995a08591cb3b291a9576c68a2bc8fefdd5421aed68acb0a4a6. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEZN82504617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e438e8d84fbf4c22fa4d427e035030e1fc411df38fab2ba9d017a3fee27db6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEZN82504698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1a76d45416b4375512b50e10969a5c6b26829eae9594e82286a0239c48a62d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEZN82504591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4eb274303a7e5c5bb0dbf25dd5a81716a357645208e572383c78cd12c60e78. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEZN82504585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccf5864b0737bde645274fb701ec7cafcad328f1a6c4921957e0ce876776169. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEZN82504701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f558d5076695b0d4a3f63c866b33a2944b3c4abbcec4e7ca8b5a98437e6f13. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DEZN82504696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84a86b46e520e67ba95e976ab3f28045532e4fcad6ce8c42211edc7ef59784d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEZN82504695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ead66f367f51a291479a382417948c51ab447aa42ed89e1c02cce420bba1d2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEZN82504697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415a28235d797f79c0b5a582bc9265faba925258c8a7c3b0dc3bd8d32866dad6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEZN82504659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8703134cab01b20c7e93a54fbd6727f7306f7efc0fef0915d7e6ef7d0b94a99. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEZN82504651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b461bff121e9851fb37bad2a6cd7ec478c23ed4e11fc9455bde464f8fb7c33. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEZN82504644.