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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df69af394874220ca0ef8befcd5e3da5f803283c79e3661d4f72771e699f904. 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/e60e5378-60ea-4add-b884-3ae6fb020341.json and https://artists.proofprofile.net/proofs/artist/e60e5378-60ea-4add-b884-3ae6fb020341.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27b06ebb2e4029c9393554fa97b1f6fca33385f8cf5fbb316ad6bd5396438be. 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/GBKQU2490107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7215f385cf42b79745f2ab4cda0fc56db9556f71189f982e57442d2d7d21d958. 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/QZWFF2484437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eef5015ca639070ee1ef635a04adc8001343da661a539439267b6e7fe0ec269. 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/USANG2434033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d860f54f999dc99edfc6f03145f5c6214b2c80e0397082fbfc394f79248702. 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/QMBZ92440104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde83872d13533c5e89ff023f691f2038fa4d867f5b81a0417c8315c40d232893. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTAU2449196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962150be798790deebe720f1cb24ceb4896a3313403e1a80797dba4abe4a5492. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM7282437911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98204cf04326c22ebe088fa05ff6675f89963a8f70e8da9834b9afd9eb0d4845. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWQ2455164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e93b8ad2f4b3787fa596cf9eaafe1e5976211e1d1f88ec985dff2de226fd1b5. 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/GBKQU2439725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfae16b8880810e61f4f806fdf466b9cb1e94d112dbc080fcf6c58537002c6cd. 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/QZK6H2409058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea721b48b547d5e4fa9ae272e8e30ed3cd542eaeb5b23daec62ab57119bab03. 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/US3DF2406538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e29c09b2f8ba814e2a132092b6b3db882482906e09f9d950c53382c3a0f7366. 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/QMANG2247422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923170aea8fd201175788b39596a7c865d09c71fecec4f923d9429c5fbb8b76f. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:25:38Z), 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/QMFME2395338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b937307dacc1d9ec5ae49bcfe2bfd0aad126a7faf7041f115048373a3ed143. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMFME2395339.
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 0x3d8db6fb1b7bbbaebca36b003ebbe4ef312e1e407b7a7cdb73df639804c8f560. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFME2395340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92708e2b3bb73ae747d1a49e42b7b1459f742679cc79ad459a8c68711b2f6e99. 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/QMDA62322220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d840a077c033ef4d6c4f9cbeb1f6ae1900c8bc04a39cac8d6c9d2767a8694d2. 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/QZNWS2365388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd159274bcb57ff5b86b1542ac66c98e77135747c3bdf8db01f03647f93577260. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM7282323964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eb8186a5fb944c5c11e3770adf3d2193bb9a715dd1f19f3c6f99be8fc84dc2. 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/QM7282323965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a31c3c6047363f58193914c6be06438896bc0f4bfbd3daeb785dfb42b8a165. 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/QM6P42391707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c569ec7d57d0a3faca14e9095318080ecd5edea89f637c73a84e7c61655633. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P42391704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee5505c214136c28c58d52a493d858c0ee068f94210f7a31e688396a9e05599. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QM6P42391705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366182a0f7677b7ee306f8fd4ced4d03d8581571e40fc5db0e26bdabe6415e6d. 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/QM6P42345529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a66a6cdbfedb23dd7c8d02258953adf28fd24eba2969cad98effb9926ce3a8c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P42345530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc78bedb38d0ea20e80d33c5ce9cfd228174c1de29016c4ba86c2dd8d51fc897. 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/QM6P42345531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae8725badfc39733969488b35a6ed2b59f6c866bf893518952382713dde1be0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P42345532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bd3968560b98f417bdde86e50b8f5cfb85a2fd3f5da47c4202a56be7539370. 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/QM6MZ2358642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4c87983f852087df1c11bb6a93d16742472c327645c80ccdc5314f405506b9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM6MZ2358660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0585627e39ebfddcf6e4880b4e63139317310439cfda49fb8a688aeadcd801d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN92318510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9facd1bd3c5f2a9743c39ff5e457ea5e36cb21a8ac6ba35a6b37f959e63fee7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCHCR2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cd255e0e45c3695abfa649f791869a2bf4c0c9336247d24b958a5b92163dc3. 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/QM4TX2308407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a43ff145a45e565bae55556eb17bafdc0a0b6af045061040f36e13b799af30. 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/QMDA72265923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901ce4b02c2f8bf078e29f79491641cd62b4735bd06738d3b7903be17aac7096. 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/QMFME2218270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070c649ceaa3525c22384d4aafc0cee3dd1b3c141b52978426117e5f3f059ae8. 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/QZTB32242442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59038f5ab69bf0132dc6439958d44a1bd6ac73282483da6d7f1fd01e10fc7cd9. 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/QMFME2209050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c750350397f086ced9d37a6418056312090c4d8f12f99a4ddc0a5b1fcd5340. 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/QMFME2209051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7314844df6a3c8edf00a5b9e68b4e83a36ffcf16bd94e8193b8f64c96f55b5cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMDA72240444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e3d4a197fc08003ac1d33270ba3514e4d3ad77f2a630d5b3db02ff11b995ea. 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/QZFYZ2361183.