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 0x59a3034d7c2e6d6d9773e534a102e04d8036fc84ea80d939976e1a12e592e944. 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/8ed8bc90-9a7b-48f0-adf6-bf91c7cd70c4.json and https://artists.proofprofile.net/proofs/artist/8ed8bc90-9a7b-48f0-adf6-bf91c7cd70c4.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 0x6eb3802a62302a42c8d95f7680d73fefdcacaed88f59675e0be5635951a30552. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US7VG1678209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216f49e589d2c208acf27ee5694c2bcb15c92b102e2eaef39e32d2583284daf9. 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/US7VG1678210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22376392da42b54cebe0ddfc56fee81342f1fa9ec7da98460f6d6ba8f4c9c0b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US7VG1678211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92efc3fcf9f9fdb22c8b25068f9a3500524cda4c5b414381e4b3e0e3e23c0e52. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG1678212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207941b7e0fed5615553a3c3b8513559283e41b149306e64e20750d2bf68d33c. 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/US7VG1678213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9b370f77cf6799c9c7393aa1583bf12caf2474c9b78008df95928b75a15490. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:24:24Z), 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/QZ5AB1604795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a1177930708c3ebd707b2ec310882bb58ffb5841087ec3a347cbbcdf3925a8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:21:14Z), 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/QZ5AB1604798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc606627d63aebe8542f2e011ef5f3b5baaa2336fe1317f57bb5f1fa267da560. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:25:43Z), 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/QZ5AB1604799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70fdf4a26fa22734f45c32d313523ac850efd61ffaf12d334bbdb2421a3d661. 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/QZ5AB1604802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cf736daab9069dc2c235d5fd6d8e55529f27535744c47a264fb5fe58109f73. 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/QZ5AB1604806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286b70fa1e22d9e9ff5f4553571d0ea12f315bd1fd38d84ea82e2f54c340f3fb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB1900589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae3e21b7dbf42cb2db05d64ec28dd037779417cef5119821bf0977bf7e4c429. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ5AB1936169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc966a9974cfcbdfe1cd6d05e716f484d121b609c5be2613ddd201bccc7246892. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG1999686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2747baa5696286d4cd0f865af44dd7364d72ad668482d9af320a3a068c4256. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FR10S2428184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752b529e42dd110adde0212ee809737254bc05883ad4c7528983cb8715aab77e. 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/QZ5AB2041306.