Bengt Hallberg (13 September 1932 – 2 July 2013) was a Swedish jazz pianist, composer and arranger.John Fordham "Bengt Hallberg obituary", theguardian.com, 7 August 2013 Born in Gothenburg, he studie
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8fd42015cc737db56a8026126340be5d538801139a7dde521335dd417d4162. 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/03f077f7-23a1-48d0-b377-3a7f332b4f77.json and https://artists.proofprofile.net/proofs/artist/03f077f7-23a1-48d0-b377-3a7f332b4f77.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd80fdbd3f6e2b8c4d32a38f5b4ad878a4117a494fa8d0bff739385d32308b1c. 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/SEPQA1200695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6353a7c71a1bd5fda981d5143bd5389391bbe86bfea651022b3c681f342e115. 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/SEPQA1200696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6d09867d5bb2e560d3a335d121fa4faecd5e90e4f51246ced624ed5747978c. 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/SEPQA1200689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d583405c9069c1fdc488345b49bda5196914627f769612f5188dbd8a26e6a3. 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/SEPQA1200690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c985c6c02a1d7633dd3678d0762a8abb58b4ccf93fd8bcfc6eddb04b613a76. 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/SEPQA1200691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e34c4ed47a239f3e95c3911f78a6d512c75a4b0fe1f93962c6b55b91bb1fbc2. 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/SEPQA1200692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfba6ddf898882432649eb17f917fe62c66c08a7ab3afde33dff74c52694f6a. 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/SEPQB5302020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059f82c8454cba160901c58878f0f2369767069b2d55c65150540971c4943e5a. 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/SEPQA1200694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9301595a834a9a350a134a07ff03b395e16e99c11793c77ce6f63f6443801c5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEAZC9401020.
Rita Reys and Bengt Hallberg: Two Jazzy People
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d740c9136d2accd658e27e0acc1a8555c5748d7d3b79c4d358f41b857cc14e9. 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/SEAMA1100433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d276e7ced9891874103c084d9a5e67bd23ec4a93d13d0c9ede5c6fd052d1f4. 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/SEAMA1100446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab64e5aea71f84045851cd4d907339cbfb42b230bbe6950c3c760d9c3568493. 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/SEAMA1100495.
Hallberg's Surprise or Not Even The Old Masters Can Feel Safe (Remastered)
”Hallberg’s yellow blues” eller Nya "Nya Värmlandsvalsen" (Remastered)
Musik På Drottningholm: Improvisation Vol.2 (Remastered)
Musik På Drottningholm: Improvisation Vol.1 (Remastered)
Skansen i våra hjärtan (Skansen in our hearts) - Remastered
The Hallberg Treasure Chest (Remastered)
The Hallberg Treasure Chest: Vintage '78
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c48ab6e4ae8f0dad50338b3a86c5c062f8840ed6a3591bdbda12c5c008f3e6. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:27:06Z), 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/SEVCE2005808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6141d82583dd4ae17bf37870e6908ad9bbf113f74235f17a3837f8bb76d84fd1. 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/ES6601801482.
Bengt Hallberg Early Recordings: Popular Music 1951-1956 (Remastered)
Lyrical Ballade for 2 Pianos and Orchestra (Remastered)
Hallberg: Concerto for Piano and Mixed Chorus (Live 1983)
Oh, What a Day (Arr. by Bengt Hallberg) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201c9ab67d0f17e05140b52f4e7cd1fb3a67339d23fc2f6a7d74b6bb3a081530. 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/SEBAA0900401.
Die Csárdásfürstin, Act II: Weisst du es noch? (Arr. by Svend Asmussen) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177927a65004bd79bc40ca9fe2c4be506e0d83413a27a4b23b46010a2c0d6878. 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/SEBAA0900402.
Symphony No. 7, Op. 92: II. Allegretto (Arr. by Bengt Hallberg) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0aa78fa46a98b71c79b719dda61c1dad67508af08cd0b76da6e66ad4e7f2c45. 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/SEBAA0900403.
Groovin´ High (Arr. by Bengt Hallberg) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6f5d61997296f40e9df89fe2fd1f099b99ade6c6f2f50b1e2c93d3bdb7fb3d. 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/SEBAA0900404.
Hambo om bakfoten (Arr. by Svend Asmussen) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84790f57617b41a8985a9cf50ee91fea0d9009c418b68b0e9ae9745ecc000d6. 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/SEBAA0900405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6779b8faf90d3a679f5fc8c388cc43e3329dab6e078829684486726e31eeb62. 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/SEBAA0900406.
Li'l Darlin' (Arr. by Bengt Hallberg) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9aeaabe9e2af7e2189b19ffc052668049f3c368efad6073b996647dd8abf0d. 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/SEBAA0900407.
Dardanella (Arr. by Bengt Hallberg) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0364b6828cbdca2e337f193464c0739c0fc79516fac6010f521309d6791a776b. 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/SEBAA0900408.