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 0xcd8d173d51d12986c2745d06ec85611877767405310e64bff0273c13f7050785. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfaafef1-d174-4c7d-8017-683d4a2e062b.json and https://artists.proofprofile.net/proofs/artist/cfaafef1-d174-4c7d-8017-683d4a2e062b.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 0x1338a22f6eb073bc52db0b5692a54d540950a59c39473ef13208a5f7284b6f37. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZK6M2466927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4731dd00915cd6652cb06ecea50227b8ca052db6f824000afc1d04348eb8eefc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6M2468454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060c826c775ef46b6f84ee085f713aa8c13bce14e7814e96fb16a3541375f680. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:47:33Z), 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/QZK6M2468452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3074df9b4c72ab0fadfb61fc90ad2823a311fdab8621f1793d072a7e623b1e7f. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZK6M2468449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d40a7c7ee690b1d862a0df79f0ea1e469dadf239a605a96abb6e01438956d2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:41:25Z), 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/QZK6G2454289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e69a6d912d84d96aad49a01c4a2311cded316eff9c37419156f64f3806dd75. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEN2417642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5658aa38c22409546cec898a38315128ba37f7adf1f84585c3f00e70eedc69a5. 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/QZNWQ2457401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eae5739e7dc3967ba0ec77e0bdbc406736f334b65800c4ceef0bcdb3a98207. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFK2497407.