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 0xbe2f0c726ce8db1965a7db5a6b239649b77cf77c00c9e09844ccd56323231bca. 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/d770394d-6db8-4b64-b9ed-ba1e07a4bee5.json and https://artists.proofprofile.net/proofs/artist/d770394d-6db8-4b64-b9ed-ba1e07a4bee5.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 0x791aa8fedce0d40e1da962094197e7eaa47a02035473f4df1456a68fb965c978. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRUM72002069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1579084db6be88e7157439a9ebbc8bf48d13c1ddafdd67739f6d525ec4089d4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:00:17Z), 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/FRUM72100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf18dac381a92a4a72f7bcc65f50d5195a861b32c58a3c3a67ff6482780b3bf7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:35Z), 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/QZHNC2317853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc596ae62dd3eeb2c6baf251df3c865c4e04c349a5b9f61c984e51397f7fad740. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:15Z), 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/QZHNC2317855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e494b2dfb75f4b3b0f38ad7722bd7b88143f602ca4644b7510fe7ea6dc46951. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W11905429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578a8100348bd3e0b7bc393f76cbef401dd13e9042eb994f8a73c5fdea3067ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W11811743.