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 0xcb57cf98f3ee72fc8769ee9774d418c25fab3ae84d575f3ec38fb9669017ba62. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93844a9f-e2c5-484b-b8ab-a03b40d4e7e3.json and https://artists.proofprofile.net/proofs/artist/93844a9f-e2c5-484b-b8ab-a03b40d4e7e3.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 0xd341b831f5dda34ca2daf88c52d1c15e8ec8a5c9abe7db74db519bba8fc6f41b. 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/SIA8Z2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf36c59d46c048f706d169839c6612b995af5a430601bc4a352dd39b2c30cf2d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:19Z), 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/SIA8Z2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24f79a73997753bf227c7093123eb099d6db20a053cc97cd2200db6a0fea412. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/SIA8Z2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f13b8baa1a3d1a9e62317833f18fc5aa9e23b0d0ec5ce4b13ea5772ab26d7f. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:00:29Z), 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/SIA8Z2000011.