Lars Jansson may refer to: Lars Jansson (cartoonist) (1926–2000), Finnish author and cartoonist Lars Jansson (composer) (born 1951), jazz pianist and composer
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 0x054852702cf40194e83eab1efd0ecac66ca4a723c6e8361988c4741d97885182. 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/b2731d5c-11e4-4965-8e3d-d3cc0771983e.json and https://artists.proofprofile.net/proofs/artist/b2731d5c-11e4-4965-8e3d-d3cc0771983e.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 0xc4bdf6b6151c87190b29e840887c585bb6398d0d45a58f75b6c72dc801abc7c5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SEPVI9119016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a37079c8bfb255babc31b776fc11d4a360c0e9a27fb48b43583c423b4bc8512. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SEPVI9119020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec77b5b6ad37ed2d23b9342dc5fb321f965f3ee8d6e015e10becf1e3f8a1194a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/SEPVI9555023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95fae8fe51890c7879c32c7c5bcf6107a517f955de931964955a71364a0a234. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SEPVI9978012.
Temenos (with Bohuslan Big Band featuring Paolo Fresu)
Worship of Self (Lars Jansson Trio with Ensemble MidtVest)
In Search Of Lost Time (Lars Jansson Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f8077a7244ec2eb0769d609144012dcc9afbe44adfdf6324cea839a63c91f1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPT700900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ba31d711700c87294200a89da1702f079fecaba6b7e57f9d5a2b63df67453d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPT700900202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dc7b97ad30d192301a4a0286a888d83afe6c24bdddadfc322307111a04e3df. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/JPT701000225.
The Blue Pearl Bohuslan Big Band Plays Lars Jansson
Everything I Love (Lars Jansson Trio with Ove Ingemarsson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d53e5b7a26fbd4315bee0fe6dc5ec2b77069e6760c4a99fc762d67bd0153435. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/JPT701600430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c6aac00c7e4f10db871276aff1a4f3a811f84425e659d7d53a14792205680b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JPT701600433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5864a78f4a0eaf4f50efdf00e0fa59365c211fdb07e1e5eb95c738563b8603. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QMDA62416271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5023c8874271a60209eabc71002e089dccec311fe7d60dc8c6e9bc3574d11c31. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA62416296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b4173b1a661733472484b79bacdfd8e5dda6116b4f19888067389e79b21f5d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA62416299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a45b3babc18bd878e5ab504953d5c8b6d15c18220afb45190d1fea99fe98063. 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/QMDA62416303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1492ee5a12176e1631923a54c88c358932d3f43681618602bdda28172d45cc3f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QMDA62495617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397dbe27ca7de0f7159d3b0b7257d5e5cc8980722fd89038672ae04043c21843. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKHZ12100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98585976953718b578993a656c89a17a52cd5eb121d1c7159aa59cd61f368020. 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/DKHZ12100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6da13eeab3cd4cfc0effd990c4aaca5432e5684d933f581353d20945129b52. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/SEAGA8703010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19b8cdd40c2f91bbf5d601f440eadd0b65e1a83210ddcd832a1453ea08f2d93. 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/SEAGA8703020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4920bd5f4eb1b31f14952bf0c7efbecef09ba60ee08a88a32f779841cdca403. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEAGA8703030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a15d152ea43d668dc918703b435cb9710f64bd522d3a5f58079c7c718b29e1. 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/SEAGA8703040.