Carl Edvard Persson (17 January 1888 – 19 September 1957) was a celebrated Swedish actor, director and singer. He was born in Sankt Pauli parish, Malmö. During his lifetime, he was well-known in the e
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 0x12ab5024ceb9ac4a9bf98b9b08d91820aabf4afb842fb759cb969f4bceca92a8. 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/117c4f91-5afb-4052-a04c-2343c26ca5a5.json and https://artists.proofprofile.net/proofs/artist/117c4f91-5afb-4052-a04c-2343c26ca5a5.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 0x46c104d74f5c12b76afa34ada37b4f8238cf16a8b5d8bd323bb222c29851e83a. 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/SEAMA3718050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698d572804a756282b6acec9dbc81e6af9d0616923dca0cb3c19542a9cde0fca. 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/SEAMA3818060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd206235e6a05dbfa17f45c16d024fc342f54a859745908bad0560b7dbff971bd. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:47:26Z), 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/SEAMM0400542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27a46b7bb2e0f6bafb08a23c0a8f00f4bc9dbd8c61c7dc3288c38a3a3219961. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEAMA4218090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a50493c6405c2a3ee0eee1817ec831fb59830dbfa4aedb5a0ed0097ab2f7355. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:45:37Z), 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/SEAMA0400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bb68b30f3ae9d8274b38c56342dd59037d0bd57cfcc39eabebdac4dd10762b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:49:22Z), 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/SEAMA4818210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffb0aca9dfde7c0a37c2d08d5f523af2acb5ba6f20d84d989cc7fa6376147c5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SEAMA4718120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2422c7d23068f658cf7d6109f7f91c321cf92dc92462cec4b11e7709bf083f65. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEAMA4218200.
Lite grann från ovan - 21 originalinspelningar från åren 1936-1948
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b32b3f9d5675ff416d69842493ff9ad340998c98b8a5d75201f94b3700aba2. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/HKI190615920.
Söder om landsvägen - 20 originalinspelningar från åren 1934-1942
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877d973e7db1a7cbc8a8a7746df7b57f0a2979bbc7a7cd4506c43b962746c6e4. 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/SEAMA3918030.
Jultoner från förr - Originalinspelningar från 30-, 40- och 50-talet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b5b96bfe9df2052c896a6e08558b962d6d6319d75a02a2b72a2ff7fb0dfe88. 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/HKI190615243.
God Jul - Tomtebloss - Sprakande nostalgi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353bc5a3791e2ff79c4b78dadaaf2d00dce075d35fb4d084716d83d5ee9bccbb. 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/SEAMA3918010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7655f59a6eb53981653b54281a52ed2a89569c4acbcce0b0392c5707531e583. 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/SEAMA3918040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698d572804a756282b6acec9dbc81e6af9d0616923dca0cb3c19542a9cde0fca. 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/SEAMA3818060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922e7b498ea97bb255df91e896192a69b77e790c8c1afdd013bc63e313eb2631. 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/SEAMA3918170.