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 0x1ba2f8eb5103b2556a2794faacff3160f0a6b9f020a7a52b781d32af02eb5698. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4391ceb-62f6-433c-9565-738ec65426a3.json and https://artists.proofprofile.net/proofs/artist/a4391ceb-62f6-433c-9565-738ec65426a3.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 0x34ab6655f35627b1108b2d6b7d834747ca1ad4a9308fdd837ec7514552e4b77c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBSMU4959027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78dc0c920f656ce9724da190eba060a980553c047f40e59729630fd28c3a7b9. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBSMU4959028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c032320ff80349caead8f1dc22829fa009189a622b61c627b14ac2e406d175. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:24Z), 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/GBSMU4959029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1284048a3ce5a331bdfa9ad4a14b8e67e26cc6b644acc3c6275d29b4522c49. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/GBSMU5246013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b35ff81f3e2a1868ecd19ff336a0ad03251ba0f1518c2de3027e19f5a301e9. 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/GBSMU5577523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672f1da618e18f29e2a5dc1f17a1d1f7eb1cf8be05ccf20e81c84842f4a7b7db. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:43:29Z), 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/GBSMU5864857.