Katharina Bauer (born 12 June 1990 in Wiesbaden) is a German athlete specialising in the pole vault. She represented her country at the 2019 World Championships in Doha without qualifying for the fina
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 0xf47a28219e3eb58c7b037a11f8d24f748d834cb5c480209e7492636920c4b0bc. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f466e3f3-f969-4438-9ac2-8fd9604e0eb3.json and https://artists.proofprofile.net/proofs/artist/f466e3f3-f969-4438-9ac2-8fd9604e0eb3.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 0x64d690c78cd3c1abab9057df32beb7975cfa44aa682ead7958c9adc5012ca380. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITS782200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b68a594ca0c3a74d58ec23bb827bbc79f6be48d1a6d682fc79391ebaef4ad9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ITS782200294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb540b98dc66ba31c419b4f0a2e7d2b2bd8bd6174c14bf0e8a42305b582b2a1. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/ITS782000494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d690c78cd3c1abab9057df32beb7975cfa44aa682ead7958c9adc5012ca380. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ITS782200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92e67c4fdaa823799fccebf4533248e4ecb8b93257fee17254e7350c855484e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITS782000512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f652982b097b63f52563b89d568aa14c1ca0fa5dc5b3b6950ccd81163e96d4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITS782401282.
Silent Dream (Melancholic Piano Melodies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bc95c070a13cf07968354a85c49681a504645b81f848b596a766fb59451dd3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ITS782500327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355e034c80552e61ecf0ea1356c486447b920f63fc2dc3d508c638c0ccd65db2. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/ITS782500997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb540b98dc66ba31c419b4f0a2e7d2b2bd8bd6174c14bf0e8a42305b582b2a1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITS782000494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92e67c4fdaa823799fccebf4533248e4ecb8b93257fee17254e7350c855484e. 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/ITS782000512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7b97bfe475bda6e906365495771d9f2dd2eec387ab01c2bb73648fe1797176. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITS782000472.