Birgitte Grimstad (born 15 December 1935) is a Danish-born Norwegian singer, guitarist, composer and writer. Personal life Grimstad was born in Copenhagen, Denmark, the daughter of Aksel Schiøtz and
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 0x734a63dc9ffef416cc2bf8f75c0244dbfcc799fbcd1093d0e1176568ba25cefa. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a298c144-6b71-4f07-898e-7bba36c614da.json and https://artists.proofprofile.net/proofs/artist/a298c144-6b71-4f07-898e-7bba36c614da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Børnehits - Blot Til Børn (2025 Remastered Version)
Halfdan Rasmussen Viser - Ej Blot Til Børn
Samarkand (Om Du Nånsin Kommer Fram Till Samarkand)
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 0x97ac1a338e1e93f03bf46ddc8c2103fb0b8931154842d6352863192664aa2784. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NOFBT9403030.
Tonen - Birgitte Grimstad Synger Geirr Tveitt
I: Songs of our time (Live Concert Recordings from the 1960's and 1970's)
II. Songs of times gone by (Live Concert Recordings from the 1960's and 1970's)
Crescendo i Gågata - En hyllest til Lillebjørn Nilsen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d8c238c6d80882be6944a156f705e9a42938e2be0a4aa6a8a78835d32743bb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOFGG2040080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d8c238c6d80882be6944a156f705e9a42938e2be0a4aa6a8a78835d32743bb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOFGG2040080.