Cyrus () is a Persian-language masculine given name. It is historically best known as the name of several Persian kings, most notably including Cyrus the Great, who founded the Achaemenid Empire in 55
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 0x6e0e0b8128b5c8bdf140b3c56ab538cfc14b675dacdd568ab1212345d91520ab. 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/579de379-628b-4dba-9ba4-5df4ce0a2cde.json and https://artists.proofprofile.net/proofs/artist/579de379-628b-4dba-9ba4-5df4ce0a2cde.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 0x815a1bbf0ffc5e27aa5cb4e9cba5ea7ed242090be2cddb23c6c02d1218435e80. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCACG1500758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442cdd158eafa3fada555ebef3390a34931c10505579b056e59c4213994ac239. 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/TCACG1500759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acb59588f7d1b14d857e97630ce5fb254617019853eddefed887d6dece9db25. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QM4DW1681411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6bee4711b74b461340c3b650f3e0a9b6b7b16dda3325e01672a0f86f437652. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCACS1660294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbf44f92920f352de955ea8088f474d3bf637e644b243011f06a14192fd063c. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCACS1660296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562214898ba9c7cfb0a3fe84a62dc1c1d89ac75d72252ef4b2f78138ee914e0d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCACS1660301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430bc3065d075529e48f51730b708f374dda2e399d132dbffaa2245631fa4bc8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCACS1660302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14462b3b0330f69134dd50742cef684230246de81eab80b07a5bde0ef62e9386. 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/TCACS1660311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ff7f18f4e289edbbd21cb56271d75186723853666fe401b6601a369d982e68. 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/QZ4JJ1708512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5def42756bcc5ba925363e8e099a07b64c16ff0f3a1ec90a1d1a67181a7f4707. 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/QZ4JJ1793860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab4c3e39d5bf72cbd86b99f380dffba4461310efa443b435e894004e0b65836. 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/QZCE61884624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8d5e94e2dfd6542616b252b8209b82354db83721e76451a9f86cee7d6b4b4a. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZFYY1990823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ea2b768c3c6453a7c07d65e62373f25ef929eaa052a11b79fef1236a174838. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/QZ8LD1927768.