alt=Hafez Nazeri & Shahram Nazeri, 2001|thumb|Hafez Nazeri & Shahram Nazeri, 2001 Hafez Nazeri (, ) is a Kurdish Iranian singer and composer. He is the son of Kurdish Iranian musician Shahram Nazeri.
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 0xeb7ccd0d405e8fedd5122bb8f21b36fa3c1e64ca9fd977cbfda25fc9e787e11e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/492588cd-2126-4067-be0b-0c4393e15d84.json and https://artists.proofprofile.net/proofs/artist/492588cd-2126-4067-be0b-0c4393e15d84.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 0x2f0be19ba95bcf7ea7a633cfe4a0face37d8636c5838626a482f8754cdae1eb9. 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/USSM11102130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7667eb2ec17fc73c57311935e8f8c5982a607c7ad9ab739a98394b18d4705c7. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:02Z), 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/USSM11102131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4566e26401b8390465df5606844df7fb8c61a660c09bb283f7dba486e50bfda6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:38Z), 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/USSM11102133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb013693f08da6609cdaf4729ded81d530b235a30f2f34be8b90bdda20ad833ce. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USSM11102134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7232887f6b5c51076672561d1ed9e5f6cbda45e7bf2c4332b1a38fbad56bbd. 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/USSM11102144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca495dab7f717d8f888a1fedc07ca7f3c6fd063d1c21684f8899aa3f6e295e0c. 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/USSM11102145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf6c73f48ea8176956a1718b268c548f750d26a35849e6bae6d74fc52682fad. 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/USSM11102148.