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 0x0e78449313c291c611b7cbab586599d5b54beee3b6b3808568ed1d34dec0faa6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9ce9180-5357-4e51-96e9-e06f9e0a4138.json and https://artists.proofprofile.net/proofs/artist/d9ce9180-5357-4e51-96e9-e06f9e0a4138.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 0xd226ce6519ff64f2b0f0664c0e432e674614c59449701704608c7ea6f191d8ce. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN72563419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560494317bf5ab82d16b0277f9d636c3fcd33708fe34d2e255e51fe40cca9b0d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4DW1767182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb486ba4036e614d1924c54d09c2c147b836a44f3e3a33d7bc4d20563faf9eb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:46:34Z), 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/QZFZ62268873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c6e9af9ebc348b9fd7e85433bfdd3a31409af657051f3bd796cecee73fd566. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM82113053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e78b74773051828f0fc47db61c86b80f0c4c2d19835c94b897bf48bb4dbb3f5. 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/USHM82113058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d4a5ec55bff5017058b8c07f9a614293ab8dbc47d83ce470bdf59a7d199cf6. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USHM82113061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e36b0245a131cbdddd1050c33be5fd6bcb43bde9b6d80e139c894452b9e413b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:49:43Z), 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/QZFZ22005641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd510f20b5e61d0d8374309611e335ca19b1f0a3eac8cdf105493eca63fdbebab. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:32:28Z), 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/QZK6G2068975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc920edf861965535901f1801241006c51497d27fe9c884ee3f8a1dadfe480767. 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/USHM82198806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6fa5fac37d7f86e1cb8ade219bbfd80896108c6ea3922c8072cb0d1e380c25. 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/USHM82198807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2725daa050dd0bda24f418548c874bc9a54464229e6fa719e47addda7b593523. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USHM82198808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995938e687d7f556db912a03b1903b41c97896c311082c57f97202d2bda93b6a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA62273548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8d8155b01a319ad3564159e4e849973838ec2ea04b7bae8fdd66be311c9e5a. 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/QZES82253731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df0f24b989edcc399a011266e5be061a697cdaba544dfbf5774759a980bdd11. 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/QZHN42213717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef10285c847fa86153652c00753d960729482f1ef693c895fc0519c3cf95e94. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZHN72200287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590cb2011e80bd3c415f78ddb6da76400c578752dc32e7d376cc2a9d40e78f31. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNWZ2283219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82091963efbdf332e05971e12ed4bc4185cae620f0277baf0ba4bb15d2c7e546. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:02:05Z), 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/QZNWZ2283220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c10fd5b7ae355cfbd3963538d162d787f22a166e3178aa969472e764319f98. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWT2270583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa0b5f74ffeacdeef83c2c97ca0864a268e0cb49db9f240896c0a1365e3539d. 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/USHM22292987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2533013fca50793cd749b153f35f85b55da5b91cd8be47ef5fa88fcc87103450. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:42:27Z), 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/QZNWZ2283226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865eeeeb13ae9f7f987a6b4a46dbece50d37a552a82a40195a61fe5ac9bf199e. 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/USCGH2383460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec4172252a64c7a30e11d41cb3b8d5ad7e57ef238d24b37d83806b1368209c4. 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/QZNWU2346859.