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 0x13f88eda1bc9b7949ec578fbe099bdb6cb0f6cf3fa58898f2becfecd9c7c522e. 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/95e61443-a680-413d-9c2c-a246ba3904b2.json and https://artists.proofprofile.net/proofs/artist/95e61443-a680-413d-9c2c-a246ba3904b2.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 0x54b0f5158c16cf4ce91175077c5d72486df4948ec07cae03b8d725a48f0aaab0. 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/QZVEM2381483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd4970333993573c76ff58649e16b4c0c0011c0bab43e68c872e323d69c759a. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZPEW2401291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ccd6354f8884c56804716a28c1decc47d53575da0be7cdf9f488e61a78dee9. 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/QZHN32418337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f9ef185aec1c353fe0f0dc16707a95c1cdef99c540c94e78e0b5527373ac92. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZHN72429107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4a5b6350b4f49aa57e68fd94c034a9f3a4fb9e59b06d3559dd5044dd16a91a. 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/US3DF2458414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80e6f63136d7a8008bc3755a10c487e1373f4d1d15f70d954941f6f7773a065. 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/QZTV32416133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc554d3b05719815d1ad0f87e58f0ab46a507629a23027b657468558cc917f0a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTV32416134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4464cfcf49cf8dbfde56658a82cc3bc338168c674a22b4b5aa5bda769dc897. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZPEW2437900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c5840362ab76330c85ff9e685ef39900e51fc0db32e13f26641904f39dcc4b. 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/QZPEW2437903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612cc3b2378ea1c81481b37d46e944ee194fd8b9fdfa0e1c988740bd5b34ec83. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/US3DF2473380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf859ff11ffa43f88b5ecb6960c543d1c4bfad9ebfa0c04836371ebdad589e488. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US3DF2485824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e9f5fda4454a92d9cae02fe4012b558b12aa9ac235f279eac854e538da39dd. 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/TLVEM2427306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94aab9c5d669e110f48777b4a4c97e59f0cbb55d1120843be2d8f612b71b6d7e. 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/USANG2412707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28320ffe5b43dc64817cd7a3ee9deeaa3376cd15444930aaef37d7606d967ba. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTAS2445608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17ba6993f46883b4ec40b3f7239c560b3270014f2db526ab373af3854c79be5. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TLVEM2461811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891ec0154f0dbc656b70eb6e94213fdbc07480edba1b641864e65e6fa4031c91. 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/TLVEM2461813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03978b4d62a0aaf94b855c8bd19ab9b42657b16dedf36ae016a4dfcc02060568. 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/USANG2437007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d88f6ac5954cbafab9c14ba5c2ead3435fc0d03925057694419e0811e21347. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QT2VB2441782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ccfa6f463e6e38753906ff285be233aeb16ad1b97aae4bfe4338f8382a88fc. 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/QT2VB2441907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c10572d2a063dee5851bbc8706c95b4d6b4924f8d81337caec033c047f24168. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT2VB2441910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24e80fbc8a9b97c21df0c99524c88e3c2e48ed7f4baedf76f44e3e95c291b67. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT2VB2448873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bbe7f6883c813ee3cd25b9c57792eb072277126b153f15a12941b591b1fd8e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7K2449214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c0eb10b114f25d12a2a43f33839d9d8977247543c983278c0f8b8a9e29ad5b. 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/QT2VB2495789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfd533366ca0eef388948481b38fbcfff6cb6b035116f3cbec6c7527e6e67c5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT2VB2496556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29536d57855ebc4e0ee326f7d7bae038899469938310ec02a8d8fa2ddb029b8. 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/USANG2486429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4755e8a7f30b6fd9547fd8a9c287d1fdfa52650c3e3354f2ec5f20b55b82b5ad. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QT3F32411564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ce1b599051267c656e2816563413143235fe94fb2ddd2beb6b8daf6801b1a5. 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/QT3F32413211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b7f16805cd65ae13ef87022742dd48c4d1f6473f517d7e70a0e5a2be582929. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/US3DF2520796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa095ef28ec7111aa4fbab8b7a9560c93c2c47560a9a00561d6c5667c007e4846. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZVEM2523080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a13cebcc6acdffe9dba976bb6e4bc87a1b3be5197657f0f9ff28c8626d82a87. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZVEM2532844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bc3b9b885785027f27f4412aa1e82009e4fa6272e561285cfc18d59c76fbb1. 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/QZPEW2512442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7663ac4479c91530ef279f481698c2cd45eb9c471a2409d8e63d3e8a35ac5b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/US3DF2553171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edfef6af3861637778969410315fbca5c88e56832508df0c9f300ba80522678. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QT4K32522315.