Jan Bertil Allan (born 7 November 1934) is a Swedish jazz trumpeter and composer. He is the winner of a Grammis Award, the Swedish equivalent of the Grammys. He has also composed for several films suc
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 0x28b878392a14275b66a460e8b38ac7d0cf06b0affb22b5fef894cb4a6818d041. 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/b0034e84-9273-4bf7-ad6d-fb90e1d45dc4.json and https://artists.proofprofile.net/proofs/artist/b0034e84-9273-4bf7-ad6d-fb90e1d45dc4.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 0xd24840e5b93cddc2fc11dd7811d4fee9eab6bc0ae7cfd2552013d6b0d5552d08. 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/SEPXS9813010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8962d028416dee671778bacf1a6c6309910912e880e18ae075b3e2f05be62c47. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/SEPXS9813030.
Trio Con Tromba (with Uppsala Chamber Soloists)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa922a053fc0075e57e6705ae736ff9186f80a385649cab51c34efb4fd418f941. 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/SEBAA1401001.
By The Window (feat. Adam Forkelid Christian Spering)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781c8a6fe0b1b439ac881b5c1d1c29772a6796b1808ea6d97807ae0d8731275b. 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/SEBAA1401005.
Och Vågorna Går Genom Stan (feat.Christian Spering Karl Martin Almqvist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10f1e8903decae763eae630d65691928a4baf912a70563f578b022c3cf18ac7. 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/SEBAA1401002.
Between You And Me (feat. Adam Forkelid Håkan Broström Christian Spering)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915eb64a83fb145894fd85f4fd3a5eeb9ba30c75eb6f09e360b1c0f83117f25c. 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/SEBAA1401006.
I Stole It (feat. Bengt Stark Mats Garberg Dan Johansson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457ba127680801f3a7278d5361d91c53192bc2b847c0abada141bce974753ea3. 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/SEBAA1401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f047969bd2aba97848f7c257b030be4e5f16e4cb59b016e4429dfd4e1fe40d. 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/SEBAA1401003.
Öppet Hav (feat. Adam Forkelid Håkan Broström)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31be471cc37022a2153769f736ce48084d4f855f1694a910d82ef978b90c245e. 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/SEBAA1401004.
Shades Of Blue (feat. Karl-Martin Almqvist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870bc5fb0a0fa3f82d183f3ae3050dbe7e7a277f1b6722fe943c4362cdd1228c. 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/SEBAA1401008.
Tema Med Komplikationer (feat. Adam Forkelid Peter Dahlgren)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd20ba726f054af43dc32ef1b4eb57453c7a6e03487b5c616322f280565c2650. 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/SEBAA1401009.
Jan Allan Nonet at Village Jazz Club, Sweden
Jan Allan Octet at Village Jazz Club, Sweden
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 0x1584b106a2680a0852b0fe5e0d29d3c8a75f4404169d0e2329eb1c6e776eb4ca. 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/SEAGA8703100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c366e033747d2d4aa71a4ea8a47ac5e9af97bdfd606e37fdf7ee1eed665285. 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/SEAGA8703190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c1cba10f684c062aa8bfb7d888ceafff31c70cc2bfabac94fae99d78281e01. 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/SEAGA8906010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414a9dd00a07898f70e5ceb94986644a4b4620c53117851fcefb5aae5bf6fc00. 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/SEAGA9114010.