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 0x99d2a8c2c619371400f1d04af27d4a430b31f035ae9cf9bf7fc9647e24df9cf3. 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/409fdd68-89e8-4f2f-b884-d3fdc036c32a.json and https://artists.proofprofile.net/proofs/artist/409fdd68-89e8-4f2f-b884-d3fdc036c32a.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 0xfc9f90136aa980d95d6c4016d15d79acff7bdc78fea74ddc426c3b2fcc90b987. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CH2741001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d7865ba68768acfcde981f54802a9d6452e0145aa60819605c8c13a7ca8759. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CH2741001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e17ab405cf8d700d7629b5deb773a331b7dcb12dfe549aa66bda70edc9460b7. 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/CH2741202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377ae49b1d05e770691f414363284ae10b68610f1e7c7f11356cd892463abb2d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH2741202002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58db941998e6facd3f2c301c4622ec53bad7d4fc9d107dfb11151930bfcfb23. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/CH2741202003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f9a195039fc87dce9b54ac3dd4f73cbd52927c9740836fc4543ee6c97140b0. 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/CH2741202004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722e6530e3d0e43066b1faf623e2cd024c98ac6c3fd26fbf805266623007f9ee. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/CH2741202008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a139ea759d0f8d4290eb3db5fcff9a34637566b61768774069a330aa7e2ce5. 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/CH2741410001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dfe505fc8b73c20eadf57c769972389f4870d9531dfd29f8d89255690f01b3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CH2741410002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a59aea00b7cf3895c13e08b3b9e2c86cc31010a9884bf7fdcf2bbd98d58067f. 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/CH2741410004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43c3ed7486763ac028f0799f8ae53a21af3171e15aa04ad6d6a5f8553c92d73. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/CH2741410012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dfe505fc8b73c20eadf57c769972389f4870d9531dfd29f8d89255690f01b3. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/CH2741410002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a139ea759d0f8d4290eb3db5fcff9a34637566b61768774069a330aa7e2ce5. 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/CH2741410001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8530502466df0dc0700d031073b18d3344c19dc2f412d61b09c34d60c290174. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEFL71701218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9588a957ef613aa588d9e4489caeddb6699c81ff7da8abc52e9fc069e5db81. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEFL71701221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4999a3dadde7626b599eab2e0faf547f7add1803650975c5454992830a26fc86. 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/DEFL71701223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb58b86fee9fbad878e729e8f3f7a7384e3b4221d41ded4ca7412ed45f82c09f. 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/DEFL71701226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa423a856d2ddc6183eeb24a4aaa5685c36ff21c60a4380669e61e895b98f9746. 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/CH8091800706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa423a856d2ddc6183eeb24a4aaa5685c36ff21c60a4380669e61e895b98f9746. 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/CH8091800706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88a9fa8dbd236aa9b67ebaebb2973b9f1f5beb49183f9b62bbeee46cda2789e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH8091800811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272dafa97f5a7e4d6c885270e78ba8458f2da612cf90fcf8992f0eb8627080a8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CH8091800842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0958941f81b2e299894ac5d74912db69c6df2a52cebfc1219a0dfa9659950fa2. 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/DEFL72101691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaa238c82a632a30c97e639f45ac3917deadebc4d7ce4994357a7cf8b4a7c21. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEFL72101692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1eb22194c8a62d531b59cc21c86bb72aa7c24420f2276b3df7c24c42e431092. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEFL72101693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0987d9a408d8d6ab6437b947b5a6d6b7397c43a360442cbcb07c3d72d21c4a7e. 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/DEFL72101694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395cabd58561126268971f2c266503e72209e4f7a56134ca3ad05c66a0e8cd03. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/DEFL72101695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0546ebf1abfac066eb2e8ad98fd353fb9df4c63a805d9b19120bb6613c837f0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEFL72101697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0eb8e3e9012adfe80b00316e16e3b1faa2dc3fd5d61d075b57cd645e116fd30. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEFL72402134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f83369c2ada9be670d62095b83cf48487063a73a46b612eebef2014247b154. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEFL72402138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4109972a622d9889a09278abb3a7fcbaebc5109dabe7109d1f1d03ab4ceec061. 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/DEFL72402177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6153d4f9e032bd2ce9ffe3178678f76efa9d738a50780b3bfaa4504fba38eaf9. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEFL72402176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4109972a622d9889a09278abb3a7fcbaebc5109dabe7109d1f1d03ab4ceec061. 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/DEFL72402177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f31d2f2c36e8a9ab6e74c3ce6b564107da89baecfc1c9085dafd76c6463db9. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/DEFL72402179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c5b147d54bd4a455dacd788f4cd580566a7c146f57ece7647d5fcecb998553. 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/DEFL72402180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0cdf6685e1d3fbbcfccf283340cf849d3dae4901a6c4271c36b1900efec6ea. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEFL72402182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668afe77f3ec05f3e3a309186e9f465040c4b538aa4c2a6773841c168697cc77. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DEFL72402184.