1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xf359d9d8e488e014fdfc3d1f69e92ea83edb2a45df4c1d96b83883330b73f861. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3bfa13a-761a-4ef6-8c3f-cb9cd9935e1b.json and https://artists.proofprofile.net/proofs/artist/a3bfa13a-761a-4ef6-8c3f-cb9cd9935e1b.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 → block OTSBitcoinBlock must exist at that height 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 0xdda8050ff83dd97de20e137ef3bff84dad5d980dab576866acd72d485803025f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKJVK1200201.
Brurmarsj Til Tove Og Lillebror Vassaasen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7ae788af8d31fdd5030f9de361a7ba0680fc8255232c3808cf286733fe2b2e. 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/SEVSZ7300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2c3f9acb4989a88ccd1bf3f29c007f78b1ae53649d6620042cda5b5dcbfe10. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEVSZ7300404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ea4e16d8071489edf4e23143c79acdb07d4102b8dd091074d8516093cc7707. 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/SEVSZ7300405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82dbc2f3a17d474267f73792c74cd447c06928aa277a73ca3b53bd4035d26a7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SEVSZ7300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515f5bc343059e8a8c11c1cc458eaa60fce71b60fe2a38af573ffe368413b782. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVSZ7300407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a7bf39fbbf833d5b2d28136b21d5dc01555d318ca6b91ccac090a3c56da22. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVSZ7300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77b3579b410761e946f8ec3bd0c99a251adc4b0b016cb234be26a6239b4bf17. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEVSZ7300411.
Persapojkarnas Polska Efter Erik Ljung "Kusen"
Siljasången Efter Präst Olof Eliasson, Rättvik
From-Olles Polska Efter Thore Härdelin D.Ä.
Loka-Britas Polska Efter Erik Ljung "Kusen"
Bytt-Lasses Brudmarsch Efter Hultklappen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe269d9c6518c976aaba12a6cb7e8f2a666886de1ad0421f8f7c1b1ef238f1f33. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEVGT9109115.
Senpolska i A & D efter Grubb Anders Jonsson
Prästpolska efter Lillbacks Olof Olsson från Galven i Alfta
Polska efter Magnus Olsson, Brunnmyra, Bollnäs
Lungsoten - Polska efter Gällsbo Jonas Olsson
Makalösen - Polska från Trönö efter Gällsbo Jonas Olsson
Gånglåt efter Olle Gustafson - Solne, Holmsveden