Lars Edlund (6 November 1922 – 21 December 2013Tonsättaren Lars Edlund har avlidit, Sveriges radio 23 December 2013) was a Swedish composer, organist and music teacher.Nationalencyklopedin biographica
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 0xdd409a2dbc88a3cceeb4e34ca5c04708d4a922dde5d64390152619c5498bdd75. Chain 2 (Bitcoin): anchored in block 954019 (2026-06-16T23:44:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/350c66a3-b441-43aa-95ca-32436d77f5d2.json and https://artists.proofprofile.net/proofs/artist/350c66a3-b441-43aa-95ca-32436d77f5d2.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 0x0e5b25fe1c8677f26ab198d48db80509db723dc091d1fb1073f1767b23a6b40d. 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/SEAGA1702211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dbfed4efa22432e550e9589384b53c3b0845a433e2f89d71f2179ede55b2c3. 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/SEAGA1702212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4fca8b5dc9391ca5b1c0a99daeeff62c3e85209f313933aa70d1a1ef8c8082. 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/SEAGA1702213.
Missa Sancti Nicolai: IV. Sanctus - Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dae904c4b95f742ec46e2fa02490910088b2dc7bf876bd764d994e01256f744. 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/SEAGA1702214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229ea2c119e7df8376ba044fba67cf4b3c59212bbc6f2686dbfc710cb6cd880f. 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/SEAGA1702215.
Two Folk Songs for Mixed Choir and Piano: I. Ant han dansa med mig (Ant, He Danced with Me)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9913cf01eb3c8459ce1ad7ddae2953c05c3588ccd8b4f31c8663a757efbbe7f. 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/SEAGA1702217.
Two Folk Songs for Mixed Choir and Piano: II. Femton finnar (Fifteen Finns)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626fa830b7588536f4035e1a1baef9f46e8bed8ad16bb9c00d3c09c36c0f47d7. 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/SEAGA1702218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4568e5b4efe3de3f4c59f620360e96452aded970c2ba01010caa809041541c16. 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/USB8U1076485.