thumb|Linnea Olsson (left) with Jennie Abrahamson during the Back to Front Tour of Peter Gabriel 2014 at Festhalle Frankfurt Linnea Matilda Olsson (born 1983) is a Swedish singer-songwriter and multi
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 0x88d18405da74e85f7c37b55d0a2da7e9f3d07d402eb7c7e7a54be3df33a63fe5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fe0a597-7444-4d6e-9398-3e5cd2d24ad4.json and https://artists.proofprofile.net/proofs/artist/4fe0a597-7444-4d6e-9398-3e5cd2d24ad4.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 0xd3035d584c60eac2eef5f1b4d61d7cd6b3fd42d1c386d4feebd1d494ae24d745. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SE2Z91100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754ae9fc388ac59277722cece371fe38588ed48ad217d65d333d0a361a01d162. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/SE2Z91100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5148a79aba5d26832710a38dfee3b355a07e3182cc4f1fca7fe6610d5e8ba992. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/SE2Z91100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4839fa85d94caa947ded6cc968906a4b6b5618524cde23618c6742489867cc1f. 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/SEXWR1400101.
Breaking and Shaking (feat. Hippie Sabotage) [Hippie Sabotage Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14230317a6e8067ecd03e59cf766284ff4a4defa1117132e85140565e0684a9. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/SEXWR1500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f15ba6adc9c004b24932cff54ec9af386151102f619a7960082bb779ce441b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEVVQ1300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3f841f5772e15f8b5836e84b56b43b5a97128be781fceb09e2ac995ddfc100. 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/SEBGA1500265.
Svarta rävar (feat. Linnea Olsson) - Linnea Olsson Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6baeeab68a66aaf0dab9e9c5176af4b62a81f8b7c647bb23f4737ed7b18b22d6. 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/SEBGA1500274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f14d3cbb90a6202ba5527ac37c46a467629f7509c5723537ff15107684e043c. 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/SEBGA1602182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b0cab6b5db6dadd2a506340425eb3cb9e6aac9c7f7ff99c9e8427eb84f8755. 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/QZX8U2400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656b629bdfe436e7cc2fc8dcdd3d0e571b083e21845340ad1b8e251ef61ec8b3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEUM71500581.
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 0x43688b2047a3bc74c567511226383dd0a7e587d161eda28974181bfd2cffcd51. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEWYD1900201.