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 0x84db275bfeba2692d66e38bc801307df68ee3dfdeb119674aa40fb9a49a480ff. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dae97c2c-179d-4601-8771-8c0f46efa9c9.json and https://artists.proofprofile.net/proofs/artist/dae97c2c-179d-4601-8771-8c0f46efa9c9.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 0xb725a7e06719710955bf7ba420fa87afde2e2e086ec22dd1d3cd4861fffedc0e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DETJ51600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbd697f7bf34caab2bbcd541f412a1ef0f7410103f8029943bd9fe5ba92afad. 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/DETJ51600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3994158735affb8c8003897c2f02f17b2a391fb71deb6f4c920edafdd1ec2cfb. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DETJ51600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69257b8790d7fd0d8559efb634880e9390d429722d8559fb10a6b67463575ac8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DETJ51600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a80eb2f26ae50618add3e9b1f985c8863064351ad47d98275ca355c86e9a46. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DETJ51600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e8762352d81cd5aa28731291bde18b2fba1199390448dfe34dc7fb0cb54416. 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/DETJ51600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab5da091fda7a53ff04b506cda4aeaa2db1334114fdf77417c13baf283b0267. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DETJ51600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c681f8072017c9aed702200304907f472f132dfa4893fdc2d637a8dc25c3605. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DETJ51600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca39d8eeb959332bef4a88d4793d7ced9b730a614917ca2d7ea33b891210e804. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DETJ51600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37c1391cfd63a7644d7414820397bbbc6e6973ed58b15e2e8ac816b2026bb05. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DETJ51600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88219a0f6bc29e3cbed33ea75021994702ff7a215b5014034e7a043b7c7d9f4. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DETJ51600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b217ca813d95c3ad7232572499bd98edf1ad2e2e8c5e21d4604df3396beb0c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DETJ51600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cc375622e638673a4124165f968f5cf62c1e64fd9237d5c16df2350804ffb6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ESA012151917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48ba49071bacb48142ca1c53f25060440283ecce9b1b0cc11256a0908285533. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ESA012151919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6e669d4c8f658c22e6dade61de067f0cc2aeea2e52e815a6f4500ae045ac82. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012151920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683699cf2f2b3134c6782882f921360e69d7e2ccf1aa781ddfd281f7c303941f. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ESA012151921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbfeefc913e45fd59f5b4e724de75e3b512afd45929562535ba508943a72824. 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/ESA012151922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99281afcc0e7ebc6379d2300e377cb7003596f95994a8a56679d36b2b47bd2ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012151923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb437f456c7e25f422ba101992bcce9ac5ed5f076ba9db3177617d8016c07a6c5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ESA012151924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf4ced02e43e9adaad24b63e92d5e9d39014abcf1191a58442f91ed288d0fe3. 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/ESA012151925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bad2e898b705edd17bcafa9f238f6795fa5d0edfe920818666ab3c034c755fd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012151926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b4d1e3ab9a7ee26f239ddb6b790f2e26a9e368d60935cddec1584d481c130. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012147032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ea4687ea8bfab653f0aee598c96d3536488924d11d9b7872accaec9ea0316a. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ESA012147033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90e6fad38ab0a4c4f1495c2ccc096e8086f4c08c9a09522160b7f451c7e66b1. 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/ESA012147034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc1085d8ebf5b0c717ddd38547b975972299bcb31299f2fe5d2de2545f32c02. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ESA012147035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9fa2c7af1f89a49d671f5c1fce8d62689bef2249ed4a5209100bede783cb14. 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/ESA012147036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6361297ed6bb4676473845b3ef154b4dd616b6080319596971e8cb89bff18c3e. 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/ESA012147037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2977396da9d940e07d5b32dc60e643d5c2711d80b2edc4a951dce90825730305. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ESA012147038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5701e826fb531342dc2516de60029a036c55d372abd2c3a04b5e64a942b1b0. 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/ESA012147039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63bd88180ccd3094faff41ef320c2d6d097cd0bdfc9dbd680ea25519203bce6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ESA012147040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe557d9ca088cb9eebf65f719e48361bfb723748b37732f784e705c126f33b262. 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/DETJ52500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505ddaad27a1d7df517b25429d717cd3ee303af78ee089056ddbf3faae8c7b25. 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/DETJ52500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80416f0ca19920edff056df22c1908886eb50a13d04dd77dbdeb1d9769aec5a1. 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/DETJ52500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750af063f9d969613317619cf4d4bf8ef610067e66d8a00a23ed54534b9c2f66. 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/DETJ52500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199e2c829ac5cc0dbc0b1e5b87e4ce6b74ac77cdde140746c2afc7587c03b42d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DETJ52500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29672ea2b028bc6161e5c2e407f8861381be8cf3f9453258a6f68ad0b0ea495. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DETJ52500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750af063f9d969613317619cf4d4bf8ef610067e66d8a00a23ed54534b9c2f66. 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/DETJ52500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199e2c829ac5cc0dbc0b1e5b87e4ce6b74ac77cdde140746c2afc7587c03b42d. 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/DETJ52500005.