Sivert Høyem (born 22 January 1976) is a Norwegian musician, best known as the vocalist of the rock band Madrugada. After the band broke up following the death of Robert Burås in 2007, he has enjoyed
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 0x83a35569573305d263ed16dcbd4d0c999bc75e72dc96c108c16b3b0da05d4983. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d797fef-5d5a-4ee1-b132-e59fe9afbd27.json and https://artists.proofprofile.net/proofs/artist/9d797fef-5d5a-4ee1-b132-e59fe9afbd27.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 0x1ffacc19405ce546b784e46aa00fd3c9d79eba72d36215446379cc48e4626cb1. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/NOAHV0401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf317092b8fe2854d36fa06573904bba6bba4ca90763442ff2c8c6099506a3dc0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NOAHV0401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2823d93a96acb0bde10d31eae5fe8ff3f59379203586a38bea2d533916de27. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NOCWS0601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dab1214e604b62c5ff210121fa02c86bd3dc13089cf0b6d3c47ac2368c2833. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NOCWS0601040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f12d5897624e17f219e0236f51130b3d7e3f970fd3934fe3f2f87ba8d81320. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NOCWS0601050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9ebd39e51b5d92293b3e5e31067c92d55cb84c9c7b5de90e5580b90360b1f7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NOCWS0601100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91149b8943044172ab14bbcfbefea9e3ad03298116f65bddc938de695e472bf5. 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/NOCWS0901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ec03d6e5e4ca83776c1e3f55393e7ba2a4389c9ebec1127bb1eb1731a2771d. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/NOCWS0901110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b63f2be4bc7e292e37a1b35bc5a2f85e173f84782c99a0b7eb05d72c9720f04. 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/NOCWS0901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9554adce8fde070cf3376a4e00ab96bc46734fbd3fa22a72e414673d65f052af. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NOCWS0901100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064eabd4706b72dd794cea1be219679df0efcd059182e17cd0f04b1aadbeac10. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NOCWS1101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8725445718ebb57748d4e525b1bc6a1b6a197c92d6ebff690cc869ce32bbbe. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/NOCWS1101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664a0fe5fcbadf20005ab8a828568673ae16e5c74faa8c617d7fdaab6cdbc1f9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:05Z), 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/NOCWS1101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d522388fbf71ad106f4e39cf39ac81314d94d0868b7fae4c6e9857922a44f2c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:11:47Z), 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/NOCWS1101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722ea4ad2974fb356414215bc936e3ca76502b964d54b75869fa53c225e0b08a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NOCWS1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442b707289266478683a79786c1758160fde8b021a213f94748e64306ab4d85f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/NOCWS1300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1f0ae67b666dca71925d92fe458b1540e39982b17e132ba39cd2eebbc8e721. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NOCWS1300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589f1409b3e119067931ccf85c1964778b4e73114ba96fd4735cdc2eeff2d03c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NOCWS1500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4e2c80833951e6bd1d167dbb91462a28a7408b11cfe6defd97c801d985665d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NOCWS1500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba6fe38de60b44dd745c38b3278a6f4104262e0e0073d439e62efa151a7e37e. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/NOCWS1500130.
14 stations (Introducing the Lioness) - Live at Acropolis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b9e45f5437fecd232c0f2a47242110dcf5bda97e17c678ff364b36bd3e657d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NOCWS1700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e87ec7cc99e57683f9499d379b0e287b3fe10c73309e9ac46b5609a4ad9f701. 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/NOCWS1500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739b8960ea87286965bf48fc1e366aed118e6fad3eb8807866b31e6cdaac1ffa. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/NOCWS1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48fe2d40b87683f10fe20036bbe1763447db622f461e0490f4a1f94f6154626. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOCWS0601021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938380403ee3cf5c9e78dd202b3222ef3813ee23ed70f87216ab597accefc7c5. 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/NOCWS1500201.
Prisoner of the Road - Live at Acropolis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46274e39924987e94e457d759dcb57a30d31bab83f4ebc5b47a8862c2a0e171c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:43:02Z), 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/NOCWS1001013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664d69047080d1a0f37ac506fbab9e6139a1f1054e7fe49a26219173dcb604e8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOCWS1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c4e61b4290862e047eceec9a9de6ac2357b09f881034da73d92e4170312a25. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NOCWS1500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9069143184506754f9c09aadb1a98e082ec37d6b25a14d9e3d1e056dfc680ff4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:23:59Z), 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/NOCWS1300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2a14bd5cd277d6964147249c6baa8abd94970289e4968a695ee065c04d484. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/NOCWS1101035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e413fee0c19ec91afc164d43f3bb4f862e2f1b6a86d19c04c1b1bdc55bacc1. 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/NOCWS1500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc665b65041f7dedd8e068033337e762a1c4edab93953615e73956cbfe46e66e6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/NOCWS1300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f66363bb8a2b134627a0ae7384c73cc045a67e890dd7bc4c37cac74281d573e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NOCWS0901021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115c6234b0d554ba79701f3ba9e5bd598fe91c625a3f1e4f1dcafd0944d18db2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOCWS1500161.
Live At Acropolis (Herod Atticus Odeon, Athens)
Live at Acropolis - Herod Atticus Odeon, Athens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feb31c92a38ffc3f1f9fb81352beaaf7735479abdb1717e2133bec220f018cf. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NOCWS1700200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58662718ac29e09da344e6c768a544583dbf35a940f0cb91d5f5a324913bd299. 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/NOCWS2001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98521a53499df0bfb62876ed893f122c36282e1679b6888dd31da93739e2ba47. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOCWS2300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8690dff3ff0ff4a90e607d088bfd27fb4e97ef75153f59de72878ffbde348af. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:53:35Z), 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/NOCWS2300140.