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 0x85a0a8551445c46fa630d8df29261ba26b276cfd0b9845a0b24b625d8b5f6502. 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/2d867a61-bac2-493d-b672-0bda94126a51.json and https://artists.proofprofile.net/proofs/artist/2d867a61-bac2-493d-b672-0bda94126a51.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 0x7f128fb0617eef2f406d23f5c010059194eefceff5207430a55b9a269f6e6397. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1288772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd657ade15ce96b0fbfffa54a31cbe3c239cb125fe7c824d550b720fb2b5abe. 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/USUYG1288501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98fd990f2cf5e31366c290c914abc36ec45a1e834ff45d7f72ef63fde1e62ff. 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/USUYG1288502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea64677967c27a6e82bc6b898549c92f5b60494a91c236a5913a0ca92cb539c. 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/TCADR1854329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67acb21e15dacabbaff8e6e5540fa2962722de501abe333b42d24c49807a334. 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/TCADR1854338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b20bfa99d35cda683faa5fe13fed3a1972eb6526f372baf662eb1d1948f25d. 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/TCADR1854340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ff795346e3f7bf0360d1db623ca868001d835a50f234807ecb3d7ff86b3d41. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:22:49Z), 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/TCADR1854341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56be2e105259de7779b1d454bcf78272fbb59a5b47aea8e0c04381183652dca2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADR1854343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3367fd5d1cc56731bf93be715cdf0708ad067fab402c8140de332da3aaf265d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADR1854345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa728176fe26533187be39a3c4ae94d23dbd81dabda4dd23180ea70f6b32b1897. 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/TCADR1854349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab57bf920e474bf367849e910c91a7aee2f9588ab9e9b28eeee892dc14e720ea. 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/USUYG1271965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c376fe2a2b35615c290b1cc8daa76ebaceab61b0afcce03495789763770d9ec. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:26:11Z), 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/USUYG1271785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24b7c882f88d98f623eeeccd81b38fba25744213d2987dd9e7a122d8b449018. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1274834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93838cf3be00665ce1d7ca710ff80bec087a9f301ad98b775b523093069665b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1274837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1287427d8f051a39cf2e17da323cb04d8279f83c3c84874d25f82e9c131886c5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:54:36Z), 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/USUYG1274842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fc7d721d4cb8fd3dfed5162b16d2ae6f07a91fbb0671bcb456ab2adae49893. 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/USUYG1274849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bd6501921f8dfe1fe847616cda1b1a3ae0737aa286e0c6af8419f9c7c7c3f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1274855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879e0c5f49de09a7788bb7c1d9ab0f917b6b30fe8933f0dc17f4a24b9919ffb8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1271784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731a7e963b0cc1bb19f38cf1e253899f9bb89a0037fb87f305ab3616706c41bf. 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/USUYG1274902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac7f90955bf5850c034a80769e52d24855668d27526de54ccc4d8e8bbe655d4. 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/QZK6M2481770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0a9db633aedbd6ae7f4fc9e60604f2f843fb32f76b7be20e11e26b72c43490. 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/TCAIA2488946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83a5312995e820b6ff195b629c902bbe160eba4de302c53bf6e6adcd86dea94. 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/TCAIA2489022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74016d7a3f8ef62c82718ed4bec60e3b7aa8c3402c7d03a218ebba37b906bc65. 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/TCAIA2488918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbfc76b5215f935beb3fc4dccb0abaa643698538d42feb33073020ab19508f7. 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/TCAIA2489032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54f7f6d0ac7454e4e06a88f090bbedbfe5126319c4a543e82a7984c81594e5e. 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/TCAHC2371870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5e503a9fa6b39ce11551c718e937399fc6ad3748e3e7900aa27cf8152ac26d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHB2389481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f451f43ba27934711f96e946e99f3833546672caa66472fe89272c23f98c93e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGX2333528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f462a4b81af68c76cfe0a5b091fcff076d37a8a05c6a95793609216b23a2fd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGJ2289077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd833a3eb7a4c3ac12f0aac151dc674abaef802c2bd0486cc7c2530d50dfcec53. 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/TCAFT2168325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b1225a5e3a1f499791c058415b74eeeb04e14b45f423a0e7b994b1378ff68a. 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/TCAFQ2193743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc2e44829fe6a95c349339746e97f64302aec7c1f44ce27de8de777cad85ecd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFQ2132390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02185da97dfaa63d8e27a9b07740b41cae1718ca5fdb1fab84d112eeb86d492b. 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/TCAFJ2113002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a40eb9fa0223e9dff16132411557ce76bfa39395cbb159e381f92af4415d4cf. 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/TCAFJ2113003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ae13a03c1ae8f4d1a4879ec7626df42f76c8f3be63c8769e821d5b9c8cdedc. 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/TCAFJ2113004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935e94911478c4e8033d0aa31002b53ba87f2b15798f07b0ec5281707695fc58. 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/TCAFJ2113006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8f2db94f260dadf9e87af174d78c89c4b49224393b94fa8eba2e708d3e308b. 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/TCAFJ2113007.