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 0x1f586b7d6bcc5a60e746ecf063886dfeca430196b7308603026f1fc6256ed847. 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/9388ae7f-5077-405b-81f4-1c7f46cfe79f.json and https://artists.proofprofile.net/proofs/artist/9388ae7f-5077-405b-81f4-1c7f46cfe79f.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 0x258c405f2ca6e43a8ba57c5a1939d6f4607dab05bcb36207566dd02e6909c53a. 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/QZFYZ2352556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50cb1e81c6953125f20f8cb634d491ae02ec86e322a26cf8d3089a0024fd8d2. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZTBD2377207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535cf1ebf7b3d824b60d3e4637cc5131948456eaf4f28d49868fe01423557574. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:28:26Z), 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/QZTBE2356999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6914bdefde5ac803599377c21ff2fa446d06814328cf82d4f18e5825ec5bc657. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QT3EY2420231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b37bfb78ad8e9150c2648a228565011a5362ac944ede9e3937dc9e8e472839. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:11Z), 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/QT3EY2420234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8ce7bf728a923e802d2779eba862275b5776f1a4b5c92c95ad3f8832d570ad. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:18Z), 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/QZK6J2576036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff9571fa167277d7303d1311dd8fe7a60b31a2aedfe3253646c7d0909eaaebf. 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/QZTAS2532881.