Bartosz Chajdecki (born 28 September 1980) is a Polish film music composer. Biography He started composing at the age of 12. Four years later, he was already working with the Akne Theatre in Krakó
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 0x1cc8610a86af1da64b72c955c38d5d425fe2a2218c16e7daa0c0014728b6ee1e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2748cc64-c4b6-4f30-8a48-8cdda5077bda.json and https://artists.proofprofile.net/proofs/artist/2748cc64-c4b6-4f30-8a48-8cdda5077bda.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 0x5d3ee3e04cbc3c7ab7b84b39783f70bb46d71eca96c5606589562a48a73abb04. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLC591400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec271a98b7b9acfc1014b23607280d0b5fc2659526c557e8b913b584bacfcc9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLA391488902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf78c71bbb49cadf379eafe2717f543b3069e744441ae8e36639d7e063bb332. 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/PLA391488908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9276a5cf76c73abc948ce5dc8b5b19e1d024d32b78b22f8da57219e9628ba1f6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLA391488911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2ef9b1261233694829de981a47dbe43df09d5c33ec667277b9f47743b202fc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:15:02Z), 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/PLA391488915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397bf76b904df9d55541ca065861e226b88d63091024e0c71aa4ba055bd75c50. Chain 2 (Bitcoin): anchored in block 957684 (2026-07-12T09:22:41Z), 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/PLA391488921.
Czorny Woron Nie Śpi (Piosenka Z Serialu Kruk)
CHYŁKA (Original Soundtrack From Player Original)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8808c1aefe91581b2530b40219df47fb14100e3e8b37bfb2fc1e57ac0b6a75. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/PLA392100248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eb1b5a4ca94584ed48c39aa5441891ffd0f4f3b6c5266d04e008574d39ee2e. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FRX762108900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3fbc1123bb79e409a818f18e80ef4f0eb9cd7cccf048d7ac173f38ef760377. 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/FRX762108916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1024a3672eb280a7934444860f2e56c39b3bd7a50fcce550c7690d1db7b226. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX762108905.
Jak tu ciemno (Piosenka z 3 sezonu serialu KRUK)
Jak tu ciemno - Piosenka z 3 sezonu serialu KRUK
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686b448ea42a5fda1697b8e0f4ff3d25d07647ef468a1f14fa847b1f9b7bc344. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA062253767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d080eba71bf4ae20ab99199786efe987e69fa41dbd2c1ea561528a90581226a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0Q2315914.