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 0xbdb057a921e1effd5d6902b667bf20ee0679caad0bc94f55ecbe84cfdf0016e3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37a0e175-b37d-493d-a720-238a3e52ecf8.json and https://artists.proofprofile.net/proofs/artist/37a0e175-b37d-493d-a720-238a3e52ecf8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wojciech Młynarski Zaśpiewany (Dobre Piosenki)
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 0x6e2f6f38b5970ee97a66444cbda6cce0ede1923e725d196a11f880f04495eeb7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLB171500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daabc907c2bbc4a6c2e4e2389df03202c0a8c58fdccac405c28ef333209ef5e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLA248931648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebf26e7787598adac2dd39d8d3595dfe357a29df9a6589cabc7a3798e91bb05. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLB171500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460a2381bda45d59b8b92b3da2a1509d169025201c6fc185679a409cae93c1c2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLB171401455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0510e052ef11031afa571d41b19f33a6cb427d89b34c62342263256ed20df479. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLD111500007.
Razem z nami (feat. Halina Frąckowiak, Wojciech Gąssowski, Jerzy Kozłowski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fef38cbfaf67c25ec7cf4c17ec62cc5fb601e8facce2aff97248a20a21151d. 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/PLA247013637.
Nie chodź do domu (feat. Wojciech Gąssowski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0ef5557d5fc9d2b66b800143d202ee5899c7169da0c46c4a322f3f9fb46651. 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/PLA247013640.
Nie potrzeba mi nic (feat. Halina Frąckowiak, Wojciech Gąssowski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0332ee398e077c550a3ddf37045c210f0ff571adce3cb23483e8cf84f3df482. 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/PLA247013632.
Moje Serce To Jest Muzyk, Czyli Polskie Standardy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19575b940363279d425fd26e30e736c1e43fca1f9905790174f204746521e1f6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLUM71600798.
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
Przeminęło z wiatrem tyle dni (feat. Wojciech Gąssowski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc088182bf9f8ce4f1b4b81ea36fd0dd82ede4b0b535653aa1fb023d63357fdc0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/PLA247013633.