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 0xcbe2399edd155922ed12a86621e1e0b847382749e65e48fd6cf51f39e81362b9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a906b4d3-155a-4b19-adba-7c31c6a59f64.json and https://artists.proofprofile.net/proofs/artist/a906b4d3-155a-4b19-adba-7c31c6a59f64.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 0xa739fd97665551769eef951836946b1414299b507e621709f5e7f377dd862285. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZES52009548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b67d20c9978638a62c1c880f00902f61f1532eaaf08fd7261fc261ee36d21ea. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:00:31Z), 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/QZES52009552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49550fc206122e2e8ed54be69b641da856ab32ae4822d3c9ed53759a3486a818. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES52009556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa03b632e37ce0eb35147e3b4568855579a5932054104e660d199b36c1ca575. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:08:57Z), 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/QZK6F2175538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20bf2daf9a8b191bbab4014b1c6c311f08e88bc1340726089a19d8ae630f867. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T13:56:34Z), 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/QZES62259050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607a4362de3de27c8967a0dbeb4a324bdb34d2ee7fe76a8463c9cb8a115f9f3b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:23:41Z), 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/QZHN52311993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9d49dd44873b0de0853107ef05e09149f80321782e3fc80c1b6e3a419af444. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6P2387013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e6f5e607eb8b106044d5c44748701a3ba3b01674ffec343a7de40dd60a3c76. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZPLR2358518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771fb7d25c133a4dbdb5954fdbe985c0c4f549ba22af7faebb02d66aa3dcc215. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHN42497850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86d36930db2535584733dbdbfab93ddecb7b2e3e283dd429c1ecd42c86dbe3a. 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/QZK6J2539303.