Helena Marianne Josefsson (born 23 March 1978) is a Swedish singer and songwriter. She is the lead vocalist in the band Sandy Mouche and has collaborated with Per Gessle, Roxette, Arash Labaf, The Ark
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 0xc18cffdd1c2985d06b5e8164f37e42ab694c1d6a4401a49786ac415fec9699f0. 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/cd7e12e2-2801-4768-ad80-b19d9421a02e.json and https://artists.proofprofile.net/proofs/artist/cd7e12e2-2801-4768-ad80-b19d9421a02e.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 0xa3d2cc8fe6eb10fd01c78711b07ef698c2497c1b5757386b7df0f2f970413957. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:29:01Z), 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/SEVWA1000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18b70be4e1b7f763b68cca5bedeb7db2909caf9c6a9c89a812bc558826b03e2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/UK6KW2100410.
Name You Beautiful (Official Song - World Table Tennis Championship 2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f8b15da20fb34ccfa5ac7ae2d7b51a32ec4cb4d6650bd2df496819157d5730. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVWA1800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ef9c0578751c474b48f94aa9d14ff998e5c34c335387334a89a0b0053d9253. 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/SEVWA2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a0eae7a6ddabd65462371c7da39bfc4ced79094ecfa1e1bbf213ed9f2ea37. 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/SEVWA2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ed2d66a22efaf5e3b531f245c2096041ac661f573412ef7702720bdc55d464. 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/SEVWA2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec83a89bf14902d573ee718ab7cb1ed13313a91a0e2ec757da8a2ad10ef12445. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEVHN9900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee525a2d0a14a62f014fcc6d8a3bb745440e09d6e26152a02ecf05a0a3f1b44. 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/SEVWA2300702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12750bf4de767c073db72aad5c355d1b8951a35c2268f1d15698b37fe2a7e81. 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/SEVWA2300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da0b12020ccfe04f6003725de462373559456763aa5baf36a68aed5b7e6779c. 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/SEVWA2300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b28fb0132e221b9f8e67ebeff1dabca44c9d794ce080a0e1c8f1dd501b5835. 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/SEVWA2300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6456e2de3c30b88ab52b63a4d8dd0ae72d87b43d61277ae4e220d58036a61ed6. 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/SEVWA2300710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fe614dfc5e1a4b7c24c10bb16b18e17629769c2631bbb4ebd3328fdb8bb9ad. 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/SEVWA2300712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53419afaccb0ed2c511a7d08e7c60fe1ad12d563c9621f4b9f3a4850e456b68. 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/SEVWA2300713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa526b2b0384b596b3e43238ea600debd01cae82debd8634ecbb99056392f05df. 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/SEVWA2300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796f6fcff9833fd7548cdf1a1ba2c90df104bbead3c92cf55d89e03b768971e3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SEVWA1800102.
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 0x66a5009cbc52ca7268618c1d988124552acdb063ce109148405afa8058a42d99. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SEVHN1200105.