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 0x72f5008d033d63fde9184da3fb3de5fd90b0ae8dc3244ffb5027c3e19b040af4. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d17d3f4-2b89-463a-91e2-4f3b593dda58.json and https://artists.proofprofile.net/proofs/artist/0d17d3f4-2b89-463a-91e2-4f3b593dda58.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 0xf59ba83ffd2be194d3695b5dafa122e6dfb4ff9e274ba92c4bf71bf9fe104243. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX89G2581428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7660b50ea55ed293926a79848d8cfac5487aa53dfe383d343542c9e8f074cfa3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX89G2591532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc682828abe1f79ebdd4f936fd4f3cf36f218cab062c9bcba7b934a3795bc60ae. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:43Z), 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/GX89G2573651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d84045505926567ce14d1000d205871c565493ed3302c699eb8bdcf1921a928. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:46:35Z), 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/GX89G2561256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58b5de115977ef65ca5fde456d36a4019d336c5e47830fb8a1e56503adee78c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX89G2546729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9101a6ea69f9ee6071e536d4cdc13f9d3a2d841ef79fafeb1cd5791c4dbba. 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/GX89G2558695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15dd10ebff6a1a7b47348ab4e7a9beb2fa562421bf3a2ef92c88a0c3537eca6. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GX89G2553615.