300px|thumb|San Carlos de la Barra Castle was built in the 17th century by the Spanish to protect Maracaibo from pirate attacks Zulia State (, ; Wayuu: Mma’ipakat Suuria) is one of the 23 states of Ve
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 0xece8ae6cc6d6127c047ef4c86a43595cfb895e458a937ea72a658fb05cbb09e0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5f39748-294d-4904-bef5-ce546aab569a.json and https://artists.proofprofile.net/proofs/artist/c5f39748-294d-4904-bef5-ce546aab569a.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 0xec929e51b8c754196a73f935be19544f4735776b034dfba726686a1b7b0d5822. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6P2193393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c80250f065aab9131bf2b11cb4e8f9e09dd1b8ad51815d9a4ffec81081faec. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:47:01Z), 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/QZK6J2162791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d2706b1683b1621900e1534bc0bad81b76974c7fb90b7f997e372718e34d56. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZRP42139806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f199ac4bceda7d4ae717e02c82368862642326bce24550e6f4ecfab28d58df8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMDA72285976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebc529e0d8bf0ee730aaf7da78b5f5e0ff453f1f3afebb16589e02bf3f444ec. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM4TW2315926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b10e40660dca93264d5331e35450dbb9e91df1e355b33c7f26412e891254b6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:38Z), 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/QMDA62361662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bc37c5bc478dc8c23fcf88f7280acae22aa26695c72c0ca6de1ff5e34fa560. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TW2414352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b949d519b5ea1c027408a3283abf899754acced3de6824ae549d3395f631f4c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6MZ2417432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314614cced35b21834dfc8a6feff6147acde83ac03724259b212633ae3a54e18. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA72459227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3354bb5bd69c11938266c3865d7c89e9a87e4c6566a94234bd4eb87674a643a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA72459212.