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 0x00917c3f70910d6d492b834eea3bb7c758d2442eb3bec3b7786c16b8bb47f787. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57d147fb-f4b3-4701-8888-f9150352dc05.json and https://artists.proofprofile.net/proofs/artist/57d147fb-f4b3-4701-8888-f9150352dc05.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 0x33768831c15c58784f1a70a84066f8ee5b20cf0aeaa1718a3bb1da9a25109c87. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:16:56Z), 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/GBWUL2429517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43b1879fc97370f56371c0c1ba15bbfb225642fb0f2f1ef2fc7202eadc83a9f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:43:26Z), 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/QZWDE2497226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27e9753a92a43fa4c7db32f8ae6ac8b9679b8712bfe6a0cef2a0e42f69fdc25. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWDE2497591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803d6892128bcaa4b0f9cc5d42140156347912f94b8cadbb5980b628c9acabbe. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTV32452876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c72e269f779defe0d18febb6f6c97dc4b8e8e69f0a1f2d84cf38d274c559e2b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:28:26Z), 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/USLZJ2448380.