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 0x0f64a25ffa150916d05301a870cd95bb7c059441d1285ce417de02722df7639b. 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/4545e889-2a51-4437-be2d-c5a7c4ac4868.json and https://artists.proofprofile.net/proofs/artist/4545e889-2a51-4437-be2d-c5a7c4ac4868.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 0x55731d6c46a2611028aae2d12e6c952a516802554871302c33f4ffcbdf0cd13f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZFZ62512173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3ea11e025d14cd25de6518254ad83d87e85831b85fcd29c59480973aa3eb42. 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/QZFZ62512174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402c243a1187c7cb1cd195f01e1cf4a7a4f9d48b22c3d6a94fc65d3b09f8d778. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFZ62512175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8f73911aeefa96ef1be5c514b48869adfc826222412ba3f40a22a474114a8f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:03:46Z), 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/QZDA42506164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fb0133beb36c4d9d02fa80ef44d39f209cc93572faafd7f8774ee333474dff. 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/QZDA62529968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe688b5b57cddc9a3c11eb574dce57d55ba1dd1129c2a251de228536676b2ea8c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZES72530210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f49323f7edcef54e2fbd41606f77e1236af0a322c4fb2fd3722fa6b60836fb. 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/QZHN92534252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd154bf87818b700e7924fe23727e51f13ae3d7544e3af86840e229d2b725dd3c. 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/QZHN92531483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cd3647371f7f9ff6175881af940e48297eae9c634f9b16db262e0d303a0163. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHNB2565794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7866cbccea01f00093b233ca018ac618548dcd5f16695f5547a8e141cd40e4. 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/QZHNB2565800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd726ba898fbf2fc8ea07d300cfc725e2b5555d7929ae8d6395637c9edf96f2ae. 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/QZHNC2520685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ef96e11b0cc7aefefe75c4effc263d54b08baede524067b6b246e1cfd79394. 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/QZHNB2563916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e7512db5fa8785f975c6ac580fde44bae2ce161c83ce31c2e1b23690be43da. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2511557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08634c69db5bbc2c2e4d33efb1a67b3c9fbe047bf2fd0674b7127121c9e8480e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWV2511556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a1e4b346fc9fa663dfecee1b2abb5a497c8215d468ef22e52da957479eb524. 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/QZTAW2504446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33eb5d704640a7a7b4ee5d710d96d67e3f1193b1b7250774913dcdffe57c508. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWFW2565965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956729947b922b16b6ba796355a1e52418071225525eb9ca7403009e1e31f62a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFW2568541.