thumb|right|Valera Cathedral in Valera Bolivar Square thumb|right|Downtown Valera thumb|right|View of Las Acacia area Valera is a city in Trujillo State in Venezuela, situated between the rivers Mombo
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc65f518dd4f50089ac34e7648f629aa7ed0094379daf74bcad8707331f7dec4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78dc32e0-064f-4816-abd5-d64f931fb337.json and https://artists.proofprofile.net/proofs/artist/78dc32e0-064f-4816-abd5-d64f931fb337.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb2f3ac3665fc0ca6a5435bc8632a9d8ef788b436d59670ad1c3a5a3e2b0f1e. 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/QZES72087777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a4e5c131dad20aa65e9844a02bec9c0cc7378fe516bb7fa13b8911619c4029. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZHN82053522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dc7287a6c33d92dda570f22898d2de6612bd99ae82b75ca2de73e495583456. 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/US3DF2008068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd905655039739dee789d12210549761d54dc3d3c8557006d67f5cd2fecffb966. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPEW2232213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa053903bca3ef08accf653e91f62fe053daf309b237b7af9a2576a2dfc665955. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZES62330278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd190c16a079fd8ef83d90770a035e788a65c87e420aa5ca0687eae6a438525. 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/QZVEM2313339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bbf3aee1f66f14323b8a8fb408d61d0bad9fac3d371bfefcd8d8952e0b88c0. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZK6L2390192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf724c51faa9585b17750174349b466eb2ff240a61b808e5fa6661f4847c942ba. 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/GX4R52337040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd497b50b22ab3445c2e21774b3d056f8308fd25a15320b3be071064f555325c4. 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/QZWFG2354565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe921d892a2a4baab81e6672a02e0928c86fade350bbe675557a30b1441ac9f6. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZNWV2495114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5410600aa02c3c6ea63396859dfbd5f88139eaf3b9749daade71b006c2e52409. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZRP52280573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7b46ae18c2b6bb92fd030eafa180af451ea1e2550ce2238764a6d8e5bf7036. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6H2258631.