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 0xf7491cac66e70687a7cae85a7440f5290facb524bfade69e6d94cab551a94bf7. 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/df2c9760-2adf-432e-97c4-4212e916aadd.json and https://artists.proofprofile.net/proofs/artist/df2c9760-2adf-432e-97c4-4212e916aadd.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 0x5ce840b2d82fab4bb9f34e202ca30660e7f4d7e4f89d125b6e944abd028c87db. 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/QZTRX2453284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa040ff9c36b860239fe71264f14ae4fecb891d0792a5aac22db053d1702cb434. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBWUL2478535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa040ff9c36b860239fe71264f14ae4fecb891d0792a5aac22db053d1702cb434. 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/GBWUL2478535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ed28a83192e93df6bcb46a828fbf4e4861f075c7a4c20666cd633f305712b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZZ8A2350748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d4a476294d5a2eeb0ec41c6f1ce8158519e2c27f99675f82a56e87c78c05f1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2488857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ed28a83192e93df6bcb46a828fbf4e4861f075c7a4c20666cd633f305712b5. 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/QZZ8A2350748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb993f8164b39d45010ec9945a85dea15b3b6eeb77403073b2f3a23623ac3e148. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:18:26Z), 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/QZZEC2414470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb993f8164b39d45010ec9945a85dea15b3b6eeb77403073b2f3a23623ac3e148. 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/QZZEC2414470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ed28a83192e93df6bcb46a828fbf4e4861f075c7a4c20666cd633f305712b5. 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/QZZ8A2350748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ed28a83192e93df6bcb46a828fbf4e4861f075c7a4c20666cd633f305712b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ8A2350748.