Kjell Olov Lönnå (13 July 1936 – 10 May 2022) was a Swedish choir leader, composer, and TV host. Lönnå was one of the national conductors for the National Swedish Choir Association (Svenska körförbun
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 0x347e6a1c72ebe343cdf0f36eaae4e8b55b3c5e12a30db584414a3e9e0a9ec9b0. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3d5a1bd-885b-4dad-9131-bffb7aeff271.json and https://artists.proofprofile.net/proofs/artist/f3d5a1bd-885b-4dad-9131-bffb7aeff271.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 0xfd618f71085f14aeb1a4543b8be7b4c1c5457ed87605d1f7cc426668be65a909. 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/SEVPA5001906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca4281c2e2c10c65822ce418df8b2360bd6c702009e5a3777081d0c91894b6b. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/SEVPA5001907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7b6a49eb2f12b17d11ec0141ed4788208f57d4302a9ec66c96ca74c68b0958. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/SEVPA5001911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51316abc934c3cfd6d12e272bc7c3f0a9031e2df0a3c4b7224653728980d1719. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SEVTM1502401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3502646567645c0a9dd74e1ab1f476a2d2c6fbf49a53bfa2f4a5a94d603b61ad. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/SEVTM1502403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda20d1572e09ce16bf02b70b27f2d53d92a4586c66fd07292f554616f6c5bf5b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/SEVTM1502404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d402fe4c02e972e4ec138adf304e9d8a951b34c22818aca53ac91c614cddd5. 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/SEVTM1502405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11600a87ef0d0a98dfcd133ef005db70304a1530754e26390807989a5d8d10a. 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/SEVTM1502406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9c07e72641ab6f7215cdd9d7f10a7a80a1809f9e6b4c1ca5cf6199c47ecbfb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVTM1502407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70076e1b5e6b076c49449efbaca7d085b306e08eee91924ec711ca0d177b65e5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SEVTM1502408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bc452a7afb22a69564b3e503edfccb65705dff71d2133aa39cdd28c111fbf1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEVTM1502411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ffabd450bb8836df1575b5158b1ba3f3c812259eeef88fdfaa7bb2a535e756. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVTM1502413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac8f5a32f1168cef5f6874d32062c0997aa65f22f5270bcf4b91730d0a09faf. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/SEVTM1502415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cef85a1522c1f841897d91c932d9c94008206b2f1b0275f2df55914e3ed7a7d. 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/SEVTM1502416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e6e2f7a3b8d6e23eaa50fec025552cf54217528795d01611d8f76786c0e599. 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/SEVTM1502418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79121b623313a301e5cb53ad2cdaa0193e4582509cbb72fbfd3d78b889fb1cc9. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/SEVTM1502420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78eb8b24efadf4706cab9f74f4cbbd5378b6c5e52f4259d3037f6d51c66abaf4. 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/SEVTM1502421.