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 0xb9081ac95d4d4abf59e71133c0b8fa0fbed17b85fea5730782b77e87195f0560. 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/071940c3-8c0d-4a14-b03f-2c1e7db5f6e7.json and https://artists.proofprofile.net/proofs/artist/071940c3-8c0d-4a14-b03f-2c1e7db5f6e7.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 0x45d9337a329ba971a20e32691dee32d0e46198745b2678e68d0fba1651a863ab. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FRX762153323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a57f0b4f27726ed92176fe5375698030fadbc1bb62b8a4e8c3a2f622f283bf6. 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/FRX202212630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5f322057be40d5aae57a93a3fc152b9f0ba6e9618d43db4c0f8155c90a1f32. 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/FRX762265783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4740acad6e537c5fca6308657a1e39e296c1aeca1c164478a46132d3540ca333. 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/FRX762265784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a1c9cc02b2bd6f58c3b6a0dbc2042e4adf4e26572fe632bec19e302939fcb4. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/FRX762265786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fb18257785bb24707684ea4185b956bb35f466c2d637d3080f96f498e6ff77. 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/FRX452216275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32b4bb5efb76a81c06eed7ceb3f303e1c10292227ae7eb5876023ff5c8f44cc. 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/FRX762265787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004040f25d62e4c483d12559113ce50dde06b6325c3607d26cced3eb5b31054e. 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/ITHUR2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651ba627e1d4954a3fcb23651594bf604e96b1c6ceb8e05e8b95da6e6425dd30. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITHUR2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe670aaa7a8255b2390682f4779f8ad8e27d8c762aa63f7fbce0ffd08f3da74. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ITHUR2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06976e5976ee5c230d34f86fe0288968f7d4059a970a982ee3cca9fa261a8147. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ITHUR2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60954d017cbf5d25feff6a0830a1914074d799ac83cec4fd843daed836d972aa. 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/ITHUR2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb202bffdb2589970abb86a9a989b80e693499bc0d9f84c9bcb3bb18e8ce4d383. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/ITHUR2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe670aaa7a8255b2390682f4779f8ad8e27d8c762aa63f7fbce0ffd08f3da74. 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/ITHUR2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06976e5976ee5c230d34f86fe0288968f7d4059a970a982ee3cca9fa261a8147. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ITHUR2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191d84ad6d7cc08aab83f7f206b6d713cdb06847f2f8bc2af027ba7f1cd0bb06. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/ITHUR2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c98d08d5f187f705bf58a949c3d6ec94e22ece4450ccd012f61243a37a109b3. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ITHUR2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004040f25d62e4c483d12559113ce50dde06b6325c3607d26cced3eb5b31054e. 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/ITHUR2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60954d017cbf5d25feff6a0830a1914074d799ac83cec4fd843daed836d972aa. 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/ITHUR2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d7dd6bb10f9cbdc7ae2a73fd62fc3d7ce6ce1f5229c1de8ae9fe9750850928. 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/ITHUR2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd37243797a590aaaa97171581767dac6461834df36e6427b60fcd31c7860a1. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/ITHUR2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0d58c8f1b27e9e5626235819725de3010c69059d653fb2595ef1336f3b8541. 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/ITHUR2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb202bffdb2589970abb86a9a989b80e693499bc0d9f84c9bcb3bb18e8ce4d383. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ITHUR2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cd4c3ccced6aa32b3218936c4693a34524570f5cfd1e931c21086cfd735dbd. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ITHUR2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580a7f4fea4a2683c96d999e76c6d8c377aa66c2fcf5667d840e0a36ce4959a8. 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/FRX872141057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48236dcb6a3bb677ed8db9e8d9793dbc03ad85140d5ec9702c5d5feaea39a86. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R2102541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072e64b78913ed5d397c9bca3e652a5538f943b1610551d5f9c9d74b0aacfc90. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QZK6F2083868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3226d04f7d2c66a1cf508f3d81ff3113ac107c24d23d7a0611df1a9106c0fd5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAEH1964369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b88ced4c3526d5664dd41af355ed2e25c6fcb64c902a7e385f1275ff4e04547. 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/ITTL52301549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe257325ac9a058e7818993692cf63baa1d0e50db6ba7a9619b0e2ece47e0614b. 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/QZES62276005.