Laura Jansen (born 4 March 1977) is a Dutch-American musician. Before gaining fame in the Netherlands, Jansen became a fixture in the constellation of artists associated with Los Angeles nightclub Hot
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 0x954c76f24d820759c659779948b479d8f585a9018819dc7bf0f09884eb7ccf03. 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/6292e30a-95bd-4769-a466-dbb8f925a730.json and https://artists.proofprofile.net/proofs/artist/6292e30a-95bd-4769-a466-dbb8f925a730.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 0xd5f8bbcecc0bfacab5d9f4ea9887aefd85e3f46c76a6092ca19c5b6294d80d38. 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/USTC90945039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112a0c1a80a273f1c06622cb8e3f7f7cb9d4ada568d79026d667cc539347a96f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USTC90945091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f8bbcecc0bfacab5d9f4ea9887aefd85e3f46c76a6092ca19c5b6294d80d38. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USTC90945039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00de3f00cb2ce40825f0369818bc85512edb0f1bf3d2d87e19567ed814d871e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/NLPF81000009.
Spotify Sessions (Live From Spotify Amsterdam)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72a5a39f1bdd54b0a74dc811e6b3656f724bb29eb9b6a7831fdcf66f61e2c85. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLPF81200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4758c9f8571039d3b90b0e79161b00b79e280e69ca635d592fcb280fbe0da97. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/NLPF81200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f3f5e86ef2627b7afa7da23f9c151812bfe1ae8396e20651faa5cba9993d1f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLPF81900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f3f5e86ef2627b7afa7da23f9c151812bfe1ae8396e20651faa5cba9993d1f. 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/NLPF81900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0c33e466414a9bd4b3cce7c78d6a0c3b13cd88083deb5df4d7479a18d9ec0d. 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/NLF711303316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9ad14d849ed4bfbf40541c330dffc7d8511e4bfaa79059f72dc3a50a1e98e8. 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/NLF711104247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f10e2a2bcd42e698536ed80d08825974eaf91dd51b329cce5e0d238fedf547f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLF711405902.
Take A Moment [Mix Cut] - Alex M.O.R.P.H. Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6aca04f8e2dcc160e2793e4a768bfd59f3f3b35a610520cfbbdb0ffe7a682a3. 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/NLF711405427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf96d8725b48830de261ab1ca866c8e7cff1e7bb3e14dbcb454be0b45b15a94d. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/NLF711405428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61832a468ecf0d8da14a2ba5fa80da917912419f9c327a2a27e42c6739a279aa. 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/NLF711405429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48d99cdd65f943573d00f607be68ded17190a83b4649fb1cf626af8506793b1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLF711405433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a8e748e235060df5370742ebaaf1820c332d8264c34411819edd2099dc6a02. 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/NLF711405905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc03e61b661545331aba050c6df62bec8e24395f66ffd2271bf8282f8fdd0b64. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NLF711405899.