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 0xe80b70321d7844fd6b877c517615a3c77174a51691039bc82aa73c2eee596aaa. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e774e27-75a4-48a4-a658-72b3bfc30c72.json and https://artists.proofprofile.net/proofs/artist/3e774e27-75a4-48a4-a658-72b3bfc30c72.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 0x2ee9bd9ab52bf641886b942e454e43d5682459908723bf8886ec7cae7b54e73b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:42:52Z), 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/QZHZ42256324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa160d909e4dcbea62ee2c9efd5c30e1168b28e6df0ba1588b116da32a4d2b12. 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/US7VG2322575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20174f953a6bf9dd04f6debfdb1f4a06a09b50c90a79fee2cdb6edb558815c6c. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/BK4DA2418844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3cb81faddb450c587480e5995e74c32cba8caea7358b8907b14dc2679d3a02. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLM2511547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ca6fedefc474aca9a54e7e0cad300fbb70f0398b97bc0bcac23d3e3180cd49. 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/QZGLM2511548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0553177c48af37471f5ddc6dcb37f3412ad1e821f1503f7bcb67cecc1f55bc90. 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/QZGLM2598619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f55102b9586c26825633fe09a04aa94b79b39e988ddab4450ab94c7364fac5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJX2585398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001bc70ee2f9a5c36c6a37bfa0a1fefa8bb78b39b0000d1453ca508baaa21ef6. 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/QZNJZ2524085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce824560b714bde44002efbdc95e13451c0a170b1549d6975fdaef9f4fa1634. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLS2494775.