Anna-Lena Löfgren (1 May 1944 – 21 May 2010) was a Swedish singer from Stockholm. During the years 1962 and 1995, more than 40 of her songs made it onto Svensktoppen, the record chart of Sveriges Radi
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 0x7110554f316b207c62fee6754f1882dbeea184b36d4f7f77c64116688bb586e2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dee97bb-1bd0-447d-a471-dc9b03b226db.json and https://artists.proofprofile.net/proofs/artist/3dee97bb-1bd0-447d-a471-dc9b03b226db.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 0xa168e205e90de9dd982eb4fc3455cda571968374b65d44ee91f308eeb2a3b77f. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SEPQB6109070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b9674d7948c2af3aab9e1a46eec13d0c22c54de2d09f559a6424650b18fd56. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/SEPQB6512140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044976c0e2759328de90558051e075b8993b9c040e37fb93094d990deee7bf7a. 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/SEPQB6710020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fa29553e085e40b7d4fe7e9f2a0c4fadc6d11ee5228b2e5f9e95b770ebbb79. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SEPQA1200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa087d8848004138406e586625b8bd2f80efb405b36bbb99ceede15e34a5a34c2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEPQA1200271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b836aabe450c188b728dc02d93d38a334458632d313190f50deaf349380c0e. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:48:13Z), 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/SEPQA1201291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6290506cf81031ef814c34b56ab18cf7192fd5adee05c25d8ee405e6aea29b99. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SEPQB6211030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84198edecbea0315ac74fd02cc5a318d494e4facadb45144dcbad677635110b6. 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/SEPQB6210110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044976c0e2759328de90558051e075b8993b9c040e37fb93094d990deee7bf7a. 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/SEPQB6710020.
Sommar sommar - gröna ängar & böljor blå
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5e8e4237700382cf899410d93820624bea9ebb20662ee7e053121659a844d2. 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/SEPQB6409120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d20f4b5ff2e4a5e9a0c8daf8cfe04c7f6eee1086cf1447bf355118ef4c1f39. 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/SEPQB6812080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7447b1b68722577cc12698f56fcfe351a143cd2652604b61a6068a7c1eaead. 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/SEAZG7901010.
Låt mig få tända ett ljus (Schlafe Mein Prinzchen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4926fbd303966647c51c2cd678c15274772264042505a65b9eeaed87240c1b9a. 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/SEAMA1100222.
Upp till dans 28 - Gobitar från 60/70-talet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1735b6c310de719eb286030b768ab402b4fa009de342d8ce77d64f2dd8f3c790. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEPQA1200265.
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