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 0x5d262da6c34191343f699e81d3b9c7282e4dca4def08904feec96b9378de9c1f. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fe9ab53-65de-4ca0-bae8-cca1bd4b873f.json and https://artists.proofprofile.net/proofs/artist/6fe9ab53-65de-4ca0-bae8-cca1bd4b873f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Akordeonowe Party - Tańczący Akordeon Vol.4
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 0x85858ad7e81d96eb0b91ac459c60c8d1a9b7c0b1712e92ea1c66c5e6340ca074. 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/PLO381501079.
Akordeonowe Party - Tańczący Akordeon Vol.3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086c5caf1fd58359483350fcb1d7cf850ab514b30024a2cf078b080368b66101. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLO381501104.
Akordeonowe Party - Tańczący Akordeon Vol.5
Akordeonowe Party - Tańczący Akordeon Vol.6
Akordeonowe Party - Tańczący Akordeon Vol.7
Akordeonowe Party - Najpiękniejsze Tanga i Walce
Akordeonowe Party - Najpiękniejsze Polki i Oberki