Pernilla Nina Elisabet Wahlgren (; born 24 December 1967) is a Swedish singer and actress. She has sung in Melodifestivalen several times; her 1985 entry titled "Piccadilly Circus" became popular 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 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 0x3baf3a2b5699658cc2ae8c2d1cf93597d81cd27fae7c456d2fd23658e3acfc77. 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/0447bb7a-fbe7-47b1-a125-0d05750afea7.json and https://artists.proofprofile.net/proofs/artist/0447bb7a-fbe7-47b1-a125-0d05750afea7.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 0x087481681266acf8b7fbd432150e73e0d5276ba5a8a217fb23ddfd4803151b81. 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/SEAMA8531020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a17f75f8926b6fc3f4731ddca615f9de44b4c7253f18bb7f271db635cc493ac. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SEAMA8531070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca90fce5be2b813cc397f13cce619eb005de2e1862e405aa0cb80af42892b42. 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/SEBGA1601363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123b8cae8f8c702d156855c1a065e59b4f06e0e8ec1702404e32218f33bb5a93. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/SEBFO8706050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e67bb3dd9e17b61b812399bfc5b97f86b79df37f01f8ecaa3e6bdff1d3e769. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/SEBFO8706010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70715e08c89d91ee4a3c04f258946270431b218790be4f1ec8ed08f4b55d972. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEUM71901013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1f1f4a803ff9f394d45f53e07b5ef77fea9195b5ae02f29639b2bc0bbe20ce. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/SEBFT9208040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e5eadb704ae8bdfa3cf2a41d8c7ff8d161e5effd9e493d7f1b398663d6ea72. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEVFN0500406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca1cc0b9f0e91b66faf8234fddedca9006e5bbb39eae2d20bc1a05cd822b3e9. 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/SEAMA0600733.
Picadilly Circus - Remix by Walter Bäcklin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175f09555f1625f0c6f917511a4f8941936c2f3d87d8639ca3d3f2f4e11d5f9b. 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/SEPQM0613055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca1cc0b9f0e91b66faf8234fddedca9006e5bbb39eae2d20bc1a05cd822b3e9. 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/SEAMA0600733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5123e961018c79325017cf42e63dfd038d2f7972b877ac391c9abb9f8d68eccd. 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/SEAMA8531010.
Svenska Schlagerhits (New correct tracklist/audio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972fcbfb691b96d76ea2b0d6b294f6d802aedd85e76ee3881df348bd9874950f. 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/HKI190853403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6788dda5a6ef251f4ab9082f66beca1f66e7241c6420fd9285cce3c5dbe90801. 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/SEAOF0206030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1a7fe6ba3c1f1dd9ce0a213f9794bc23cebb782861dedf593883b015911397. 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/SEBFO0300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5538993f99550bfa7dc42973979e1b32d65f10a1588212131a3719ba0cb7bfaa. 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/SEBFO9010030.