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 0x9a6d6cedd7fbc1e9c778a2589fb6a9cea49b9cb2f5c890e0a678186a2fe519d7. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebaa68fd-def8-4570-b669-b236b70d224f.json and https://artists.proofprofile.net/proofs/artist/ebaa68fd-def8-4570-b669-b236b70d224f.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 0x9f5bfd7876c9fa09d1d89986c15247fc0d753a5723f977dd8a5a8ea49defc579. 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/SEBAA1400601.
Djefvulsdansen (Arr. for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9b9afd4ba72a780e0584c2db93ca23ccb0a9940dae8234f54d5c181d7bae9d. 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/SEBAA1400602.
March i säng (Arr. for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8296a6ca50a37f4ef82891d312bd7e1fd2a7ab84c5dc61f15e9013330e9c987a. 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/SEBAA1400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae40da64a4b772176e19ebc9f9f38fb69119b4ec49122c1421f9903b3cc43d9. 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/SEBAA1400604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7af49a94e8f1b9103da964babb35aee2155f0f519bc61219f2f56ca031db3a9. 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/SEBAA1400605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b1773c782241fc9df1071d2ad736a76b7c24519b965c47056d66b040aa99c5. 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/SEBAA1400606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a3b2a439731e583298fac9447a5983fe24c493d9a38275af47dd10fea111fb. 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/SEBAA1400607.
Ringar på vattnet (Arr. for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3e22a443c3024c699ca9b9aff53217725f26cdb49f42bd2bd49899a924b0ee. 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/SEBAA1400608.
Bullaremarschen (Arr. for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7c2f9bc9336bb1dd5cc261f6a65de0e44bbb3e1d1149c7fac7438c3dda3f59. 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/SEBAA1400609.
Bertil & Eiwor (Arr. for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970a6f1c15ab24b017bf936d1868c8cbe475c2e5b134b37c1aca7dff557fdb31. 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/SEBAA1400610.
Knuss-olles livsstycke (Arr. for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df0f7d56380580d859907cd4576e4731c59a955aeb6e1cbc3e8337dd57b5bbe. 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/SEBAA1400611.
Min levnads afton (Arr. for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96b6d20a5cebe514f7fcd4b8525f40dc30885dc6ab401195db4c79db670ad24. 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/SEBAA1400612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878a64d5d8aedb1a6540235c2483979f2df0648c606772a5232cfca7c8bf5185. 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/SEBAA1400613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d6d76991d6594f6271fc97f8c752c12d54b58fe88d30ba2a2235250504fbf2. 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/SEBAA1400614.
Mitt i juli (Arr. for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809426a049f23b426e8488b7764af933e9b8bfad530646af3566e579327f95df. 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/SEBAA1400615.
Brännvinspolska (Arr. for Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3023a29162d7d78ca88f709ff7dd2a7cdf018da0c29581c648f70bcb01512d70. 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/SEBAA1400616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e635405856d1e784bde6d060db5b290e2870db2dea925a37aec4459aa93fa3e. 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/SEBAA1400617.
Djefvulsdansen (arr. K.J. Ankarblom for violin and orchestra)
March i sang (arr. K.J. Ankarblom for violin and orchestra)
Polka (arr. K.J. Ankarblom for violin and piano)
Vals: Vals: Stortut (arr. K.J. Ankarblom for violin and orchestra)
Slängpolska: Slangpolska: Jerker (arr. K.J. Ankarblom for violin and orchestra)
Ringar pa vattnet (arr. K.J. Ankarblom for violin and orchestra)
Bullaremarschen (Bridal March) (arr. K.J. Ankarblom for violin and orchestra)
Bertil and Eiwor (Bridal Polska) (arr. K.J. Ankarblom for violin and orchestra)