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 0x351908453b015a45656b2ce038f97330b6191cb38f9135b490f783ae27225083. 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/21dcaffa-6da7-4cdc-a14c-722af063f91b.json and https://artists.proofprofile.net/proofs/artist/21dcaffa-6da7-4cdc-a14c-722af063f91b.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 0x95554b60295fd0aff5ec221dd7443db95a64e79f4b4e4b32dfff27b1c53daa6c. 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/QZHN62271859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91fe2436fb964df44f5943d11f16bf5edbd112906ca4646165194a8c1608326. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFYZ2354745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf09ad32064b1554f9283874d7a5b2a4223b78972ec3b404a04a9cad1cd9b327. 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/QZES62451582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11f2c31394ecef4fadc0a532b2d4cf75196d672a6a8d5bbfb1bdd00f45b52c6. 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/QZTBE2415832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00736a4280552363fd9a7c8232d41062fbb7b821615ac678c83aa3edd3b8c7b8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBE2422328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44142c55aa1a25020641f755cf7bd9f2881621d6718c4001a6126024183aaab1. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QT3EZ2493828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc733bb02bac46a735c109046cb6fbc86929361d00bf38f94cfc4be9cd1aba8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QT3EZ2495971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa4f1886ee073a4882bb695aa6165c78b488aeb1384c35977bd08db7e3891d1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:08:36Z), 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/QZTBE2423422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8edae12ba897f7335c049624f230f2db0e94c1e185c3af042334d969a32d8f8. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:24:55Z), 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/QZHN82545913.