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 0x3770707fff8f13bd6435025bee5c6a97e621dff1dad84590db7f0857a68aeb62. 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/be0dfd7d-8b4b-4645-a822-82696bdbdffd.json and https://artists.proofprofile.net/proofs/artist/be0dfd7d-8b4b-4645-a822-82696bdbdffd.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 0x02b35e5e49051c4eed97b8aa5ddee9ef8ae64ac77ab758c22e9a93d95647453a. 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/QZEKE1934965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6834288386703a0b1bf0045fa64f0bce5a14777db38bf9f94ff1a81fdc55c3f6. 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/QZF452006661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8718717a578805806c76c2006f35f667368cc7a864150fb62c79bccc85e029. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZF452006662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ed26d2b8ec09d5230cf547109d7e629bd083ac19ac003a4d9e7ad8aaa8e2f3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZNCB2184809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01e0397d011004036cc67ab0aa83ae32ea0d4aae7b4b016c7be5a7a9216c9a5. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZNCB2185707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c70abf937c9b4a13a67d5811a696210a3c598479b141aa257810b948c9382a7. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QZNCB2185708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f54c49fbb45fdbb65061587eb014c373a3735cb48b90142780a7ba8b020391. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZNCB2185709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0714bb4f650a197982d9695dc677744f4eea275090b38d4885792990ebb6b9c3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNCB2185710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc52ce15818c9e01cd7a5e45af4dcf3adf4fd2d89e42e3c455a0d80535f68f2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNCB2188947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78801cf5e99873889fb7d1932619943c581e300edf414772269810a07e853d2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNCB2188948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc850b26447a43199ba01efafb9a02b0ee77c4224a630d03c56b2a37ae8b9aa. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/KSA012293795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed1898b6c8fb9f595348fae25e0294265f9450659476c4d3bfc06420cbd8a3e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/KRMIM2417895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eec40c324de58f3dc464d0bfd8e217bdc9ce09652ed65c3581322cc5332a8b4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/KRMIM2417896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826ee26dfd39fc758202c6d9221d88d011c7a833d5ed0ac6ac3a689ed8eab44f. 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/KRMIM2417898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828676f9ba8731501a723998d6dd1c58e1af1f030082fa81b737452d75d8882a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/KRMIM2427036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4153d9e8a9c6fa4f41ee9901e95286cab50dc8dd6f30c57879e200d85d925ce. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KRMIM2454877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398a1f31608f4a73096b5a4a0ae4e7e85e9970229b5cd391f5b41a10395fd6de. 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/KRMIM2429989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331019ea679089eed13f20e0a58ed51f8921ab0aee67827995afff548acfed00. 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/KRMM02310334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6624c2411af73be49136d094b56ecd9b73480259ee09a8f5dfecb2de541a89ea. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/KRNAR2371119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bfe76a8ca00d2ed0eb7b08e38c7a0ebba87b631cd9534aeb6803c500e5477d. 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/KRNAR2352291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafe1d255fcf929af80e88e8883e3fdcdf42ff8805c8430ab6a0e863f3b1a3e9. 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/KRMIM2401419.