Lars Bygdén (born 1973) is a Swedish singer, song-writer and guitarist. Biography Lars Bygdén was born 1973 in Sundsvall, Sweden. His musical career started as a guitarist in the psychedelic bands
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 0x857cef5d52a3d05d05c381314c4cfdc47d33a7478d4b05baca002543d11c849b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fff8a584-806b-4855-a802-d80485cb9021.json and https://artists.proofprofile.net/proofs/artist/fff8a584-806b-4855-a802-d80485cb9021.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I varje andetag - En hyllning till Timrå IK
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 0x064b9b8ba32b5656729929c99d12d0b126d3e4f92de856d9c97aa7349c7f0acd. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:40:05Z), 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/SELIA2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436623a7a9f0d86ee29f876cd4cd22bf1c339e64f3bc9925c18ccae061bf5ca7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/SELIA2101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76107bfe8b6e1a84b4a937bfa0ea24b153d726e587f4db1758b9ccc0b9d3cc69. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SELIA2101006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c105c8302a329227469219dc4a80195c98ff065b9683a1f2ded56971f8996b. 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/SELIA2400101.