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 0x6ef508927135be3976bb3048f3d39f4033e9f01e9b504000c89d9840689c7a28. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/006d51a3-1c44-47bb-aca4-7190b2821407.json and https://artists.proofprofile.net/proofs/artist/006d51a3-1c44-47bb-aca4-7190b2821407.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Var hälsad sköna morgonstund (Arr. G. Idenstam for Voice, Violin, Choir & Organ)
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 0x86dbdb0794a16d5778e132870022d8047ccc70ac6fe853c03e0410407004cf56. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SEAEY1834020.
Tiggarvisa från Malung (Arr. G. Idenstam for Voice, Violin, Choir & Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e42890a4efccf6ff789f0ec3e61211f6a1ed57d41a18f90163bfc34e57bf2e9. 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/SEAEY1834040.
Polska (Arr. G. Idenstam for Voice, Flute, Violin, Choir & Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa632d90c2d1e755bd474f6a5edccfc623efd13d275f79b6fa1fd04a9551c5fc0. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SEAEY1834050.
Nu tändas tusen juleljus (Arr. G. Idenstam for Voice, Violin & Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde14ba4d75399da7da75b3ebd13252f826ccb06125f25f1c2a408abc4efc4629. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SEAEY1834090.
Staffansvisa (After Bach's BWV Anh. 126) [Arr. G. Idenstam for Voice, Violin, Choir & Organ]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f26f1bdf25b7c6fa79baf8e4bf204eb6ba1a2667201ae2eb7fabf7024cab433. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SEAEY1834110.
Allt vid den ljusa stjärnan (Arr. G. Idenstam for Voice & Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866a644f1d4d39c69c998fd671cd9ec5e356ba36790dfa45b1b9e34cab194183. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/SEAEY1834150.