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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 0xa53f6853c8285d1453ca9c50380bc349c299bf22c7e2f1385182a05019c44d6f. 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/110d004b-e092-4586-b9a2-a6f07b89e663.json and https://artists.proofprofile.net/proofs/artist/110d004b-e092-4586-b9a2-a6f07b89e663.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 0xef255ffbdba2bf704058f4aef686c3f8158aeece54087103d6ac1975f8337a30. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/CASD10608939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e45be5a6853bce0172f23139df275172ee4499ac8380ba1129633b32b3bcbd. 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/CASD10500844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadc806fdbcc2ee815c9edf434824f82b459c5dbd85d64486d5de71d1cb92829. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CASD10801124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657da4f149299da0575316447869105e169bf2e3b21853e2f826b9064d29ceda. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/CASD10801126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd04721cb4f2f3d4534075646a92b75f85eac04ab22bbd4e77e1ef7b8d88f6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CASD10801132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83af7f6f83477e099678d7b25ba03263396d3bddb792ec2736c78ce00bca13e5. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/CASD10801131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114f9d0b92d745d2e1e09e0e95e6e170a9d955047f6e950573a358fd0bfb44cb. 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/CASD10801127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c4d0e427390bd2efe096e2ceb01506ff144984223323b998260a046fe4c6b7. 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/CASD10801130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293d136fca1edfd641f075ccca70be013d1c4d712862d277b810e874da30abc7. 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/CASD10801128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a07d92884296737b366c0c749e3c2ea7410c23e3eaa8f07ae6ece67393289d5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CASD10801133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23688266c66f8480a3694e9109e88ec85cc488171b0f63a18beefd400ae742d. 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/CASD10801125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c3d5782c3f04292a462babf6ae1c663ec235b7071c12531325e541f865a3b6. 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/CASD10801129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab09739923f259d42cd5e4a91e80fbd6af0fd93b671c745f6b553fee5e8f16f7. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/CASD10601676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf689d9b3ddc7922caa79b6c36f35b602b684d40e6a138161537b35039ec9f6ae. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CASD10601677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3b0b3dc191e9b0fe3dbf2b10a5025d0796f9f20734dd6099a5c99675627f68. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/CASD10601678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d24715f750d9d396e7c6a3cd44e8367d97e13db249b7d3312f23d246f8c9278. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/CASD10601679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77590825bdd1fbfd79af3f0bc7693a4aa2cac61eb955e80e32ed42b5b0ed5246. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/CASD10601680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c630a0dfae0638c38591e2cd9c8debfbaebc5f0ba158abc7a79fe7b978efd8. 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/CASD10601681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f22d60500a306a75ae0ff2c4140cbeb78431827faf2f02824ae4c63be56969. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CASD10601683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4456b456cdc6b7aafc0857014006b1d1de8ec412f3c29fc6ac95ab581805a591. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/CASD10601685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135e788f0ada4e7ff063e961f0f278f95e1ad8667f601e9ba6a92804f8753aeb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CASD10900610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f41e9a7fabb188d72e5a82c8815382c9203ac729291e1d3c6ca1af7aca9de41. 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/CASD10900611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435f48f60238e35328516f1b07545eaf904c14037e27cde10205543ea92001ea. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CASD10900612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bf94fccebdc1a79fa40b4606c5492d0a0da74ba59f63cdde2f3ddcf4aaed08. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CASD10900613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4967a51fd398aa53adb8e985e65afa8ea7feb862104c2fed333cae1143c68bd9. 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/CASD10900614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215ca8349db5b19a8e241569689d2f9ddc7041b567597d47cc74c1cb909dc0ac. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CASD10900615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda726f5378bc5e638771f70977d9a5d3a4e7aab4078403d484b16a377b670045. 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/CASD10900616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b047c3a7a903b9bd68089bc16f173cca97b50b196ea07d8ddd883c0b086e5e7. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CASD10900617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b54d794b8446ea5b634aff28e4a381357fc1c2493abeabd3efa14f30b9af1a8. 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/CASD10900618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc579c0b374252d97b73475a197830f59643c12e4bde019d71e2adcaf2e22ff. 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/CASD10900619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d292fc858fe525bc0f220f38195c75bc32f47d53e84559f0bf9cbd133562c3. 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/CASD10900620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837561911d4df1594336ae6867b9bffef5808998b7ac167a8f014be1910bade8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CASD10900621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e45be5a6853bce0172f23139df275172ee4499ac8380ba1129633b32b3bcbd. 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/CASD10500844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6027843fe95d6f116e2e589f68f2ef19e3a1fd584cfc823ee0e536d9d5dbbfc3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CASD10500845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e2076cff38cf37c34f0ef4c3e234b5e229813cef5407ff380019018e99641f. 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/CASD10900280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb853233d66ddaf13916eda7b5e717a0ce401eecd1e650b899e98cf4a208e868e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CASD10500846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf423a403a63991dc14eda1542842e6947653512f1592989893df5d3d90ae0b9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/CASD10500848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3175ae7fcf0d493af63be4381420e409c63f44615cfd3c6b043789f276a75b. 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/CASD10900284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc9db9d36577a1aeda4126dbf8685ba6856d87de862bb6e283de890376d9e50. 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/CASD10500849.