Lauf may refer to: Lauf an der Pegnitz, town in Bavaria, Germany Lauf (Baden), municipality in Baden-Württemberg, Germany Lauf Cycling, an Icelandic cyclocross company See also Hans Freiherr vo
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 0x61aad8ee737e14bbffb3a3af5fa4682df58ee965b38e7483088b5aa8f21b8e69. 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/68f8c884-6dbb-4fdb-a0ac-a871928ceacb.json and https://artists.proofprofile.net/proofs/artist/68f8c884-6dbb-4fdb-a0ac-a871928ceacb.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 0x661da737a5c1d676ccb26d980398f2286d3d434d5cbeffa1eb9f9a0882ee5b0c. 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/NLUM72301325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8536c705f4a7de43190efa49be415b830d0ae0a0f3069f81791a538426638f. 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/NLUM72301000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46de354204f65dc456424c1d11f90807b920f2ce63fe2c8af36f6a52453c5ce2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NL6SV2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e683f99dcc66c14b89df1fbb67c743fcc79ed60788008d3be7667d4924bf0e. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/NL6SV2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbede3ae89fd7e7f46f688929b9f237b10ebe00787cd9b7b0856b27f9c46a09eb. 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/NLUM72300641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf158190c1ca125c54a658bc6e2b6671ed897145ae24d7e10122d4ee6c2154a06. 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/NLUM72300655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0e133550dc0a1da206f25eb1f4cdea5af0d3b486fcc8adcf2943d2fd259dc9. 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/NLUM72300615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c6f7f23a38d74e74e1b57df549e522a2a4ff006f1442b4d5c0d38a8d2b9e93. 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/NLUM72201708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d945a919c392610b00a41ac7ef02bc738f1365b6551ac762f9092adfca2554. 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/NLUM72300654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5688601430e547ef1b45beb23fbec3ab0dc6fb166b2ace867f90488ddf5351. 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/NLUM72200349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1f939e0ce3cb5edff55f6bfaa27ad90d9b77d40a39ece6e0084df9e3a4b4e9. 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/NLUM72300652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff6e480c171a4bb92b10c3c72ead6fb3de720b3b181e99f049e6ee23d4b9885. 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/NLUM72300653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07413e1d0fafb79125e82171d8f6d1b686f7ee0d06aeb2c8b8542e71ab227888. 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/NLUM72300656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a306746a94f78e93bf1f21c42576cdce2904bc872ead3a8d60770e89295b629. 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/NLUM72200883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd7829de22557332422cccfabcbf9845a80ea8c25cbf8dcf6541778a8e4465b. 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/NLUM72300448.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93598d534fc749c280999781978f72012810d4566f19d1460dd6f194baf34a62. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLA802100131.