thumb|upright|Alina Sorescu Alina Sorescu (born 14 July 1986 in Bucharest) is a Romanian singer and TV presenter. She is the host of Tonomatul DP2 on TVR2. Career Sorescu won first prize at the Child
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 0x611ffbaada63725ef9d924760236169019457babe71442c37e7813bd1ec443ad. 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/eb301331-4675-4968-bc40-8506e6d1c45a.json and https://artists.proofprofile.net/proofs/artist/eb301331-4675-4968-bc40-8506e6d1c45a.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 0x339179697bccc1d4e93dab1807134089bdae3d9d05fdae621ee247bb654f74da. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWT2248032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d390ea2512b24ee3ed55ecda45517211bf0dd6bb7e9b55a5f63dc637005be2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:24:40Z), 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/QZHN62336521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ac8a9455b4897239d0162e666f322872cec2724525c3389571f5523a00ec01. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA082389443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1d497c47bf90b7979b9b4e3ed7d53dbb2c035d24f4d4210747dc93b113efcc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM4TW2499732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeed30a99eb14f6f7387a3c229aa7c711ba00186ab04cbff1857ea04c26c1458. 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/QMBZ92461907.