Andrea Ferber ( Zellen; born 28 January 1966),Ferber family tree (PDF; 18,1 MB) page 7 known professionally as Andrea Berg, is a German schlager singer. She performed at carnivals as a child and beg
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 0x3816440d400c8c0aeff3adca0ce243523dee0782e875f769b514d2d33f747d95. 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/4be871f8-ca44-4757-b215-3b0d5f39d7e8.json and https://artists.proofprofile.net/proofs/artist/4be871f8-ca44-4757-b215-3b0d5f39d7e8.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 0x66183c11438ee303eaedfc09086dd274a59353aba923e9a6402600ebfbfdd522. 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/DEA811201222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6e9b4ee61f4b73ac65b9c1a1a259fe78f37ca5ad37d590cbd0450787377bb1. 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/CH2881800330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76877cc12e66e915e2eabbd15468785c7209853654cdd3019fd75e341a69ad93. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEUQ72200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dbe3743f098fe1a7c92a1f3b1b675b0ff1928bf9c729149ccfc4225a5db721. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUQ72200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862c8fb174fb88ef0a20b1bda8a453fea686e07b3f422cfb70e0799fd11a4b5b. 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/DEUQ72200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8355ee656fc7c43cb3b9d4177054dcca11d252451b44f50e9b18dddf386aca77. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUQ72200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76877cc12e66e915e2eabbd15468785c7209853654cdd3019fd75e341a69ad93. 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/DEUQ72200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2289ab5ccf26bda8cc5097b6d8c619cdd83fd7bdaa78500454890901e937d6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEUQ72200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fe948d01dec9935b855bb59c674791f53db59b372cb4783487dac8db787ac5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUQ72200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea1a235db99f7cb457080f94d4a5d61d151d264f8dbfd63c901388c8ceeec2f. 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/DEUQ72200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08875944133d75222c0317385b67001dd49129490cf5ecdbf34ceb2481a19d0a. 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/DEUQ72200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b96f1500a30e0c1378bbd0d8ba3c6cf28818c32a216c1fc54663ea10fcf96f. 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/DEUQ72200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa6e0c5d126c84cc2b950dc822ec276fa2a7dc1f255bcafbcf7263dfdc94deb. 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/DEUQ72200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaca4f623eb606e580c5d964c3013ad6a39dd0244a1806029716e315543507c7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUQ72200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55506c3f44528f2b8ba622461744ed528695df06c0ffc64aefee04ba46c921b. 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/DEUQ72200012.