Andreas Bach (born 10 October 1968, in Erfurt) is a German former track cyclist. He won the team pursuit at the 1994 UCI Track Cycling World Championships with Guido Fulst, Danilo Hondo and Jens Lehma
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 0xa65a5b659ed162c261eb2ce1df66f0e5d735a68f059cfa8786728a4c9136c282. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21c953be-bccf-49a2-837a-6939ab54a695.json and https://artists.proofprofile.net/proofs/artist/21c953be-bccf-49a2-837a-6939ab54a695.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 0xfce5771bce78317b0dfc50db00837564ebd8368aa2db98266fa29c0053034c2d. 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/DEAS82000242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58009d04c71620ba5d721f8df3c49e02cc1a071ae18608f74cbcd248c2d6efa. 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/DEAS82000604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7419bf01072882ff9f8574b720a3dd9f50c83cc6aa2fe3a8252b19384f39f0a. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/DEAS82000436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c50c7a3490def32a6f7180f8da9e5185b16b90857aca75da8b53be195b8ede. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEAS82000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e583fc6e6454881a20afb89b547c22f233ffe8b971c4bf66d8cd4539bd300f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEAS82000194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e9164fa8b1d34366d0f7a07447ea4f2c8a7904ef6714390fa29508374cb2fc. 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/DEAS82000195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cabb5cf577018fbd0c907adb621033f3ca2c9b2e300436f8e98293c914a4450. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEAS82000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf073eb64543d7feef1e1253a58fb1e580f610006bd8593763ddc042285d93a1c. 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/DEAS82000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a62313098d61fdde406626f1b979750b5a2881fd7c21244b3eb9f6d8e8afe0. 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/DEAS82000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a36652c624734277e3535b4618ca4ea728d36f2830c101286eb55211209cac9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEAS82000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d375be3ea939052b46e7c7f419bc8eae17bc1169db7ad549785ae3c5a20aec. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEAS82000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e66460e9b1981a5af8fcbb23fe81996b630db98faea9fcf2d541d9bd215375. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEAS82000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb858c7278119baaeb83c97950334636026b4db99f6f8229e3a1df2f40982b8b6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEAS82000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0581e9507fc7ce039c8baffa22ff88205425597575b00f4cef8cc9ec41fa8ac3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEAS82000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f4df03a484353973a775dd13a12b9e251499382a93f0727361d57e031b29e6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEAS82000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d6630faedc27d04f63a9cfdfee3dccb4277bece10911b45a9d4f32ed09f6cb. 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/DEAS82000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5223f97b3b9fb2287af10060a6bfa29588cb19585b96b6305b25fee51e3d9b6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEAS82000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591ce2b7a8271a13cfa2570120b948bc048f816cd8cdfd3274af2331aba9187f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEAS82000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c23bc59f2bb5bf0f0a5d6d105c5ac064e4dbbb142bfc9f40c26ffef3f109bf. 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/DEAS82000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14684349b26eede1048267e16a3c39dc7a2aa1c32ca063b5718ba6ac05d5902. 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/DEAS81900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5ab083e4aac9a1759d9ffc73fc3085c772ae4989e8d206fc8c547946a96d4f. 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/DEAS81900046.