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 0x491abc9b613a07d6c37960278a10981467977ea5df281fadb458901623db40a6. 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/21c51267-5c5b-4467-9bf8-45a7d9c0cf26.json and https://artists.proofprofile.net/proofs/artist/21c51267-5c5b-4467-9bf8-45a7d9c0cf26.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 0x75c82b70752504d74aa4d7fc51bba2e9b9f9d95c8923d7adb353f9382a760277. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:40:32Z), 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/ESA092312478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42b1009fd2e302274ca63e4c24f16083451e26f2f46a24dafe6262e684000e1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:14:12Z), 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/ESA092336261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4ba0ee3815af41ff7849baba61141cc257f741910fd91e38f279a95c8ff415. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/ESA092336262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c7a4c09eafbd840543614b968164cc74758ec1df6c622888fd91cc3e458a1e. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ESA092401644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6af1a8202ce68c8dce8f9ef9c0b7a1177cffe2a2d2c071788646fed2015a5a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BK4DA2411537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d83ba6dc68eede1ed7f838d036ab92c63019bf91a467c6d60dcf532c7f35fa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESA092406174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8a7e4fe51ba28b698b316be035b77efc9384c51aec6d7ccab27d3ee09f2607. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTVM2494797.