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 0x6794906f5d19b88971701574c30276558de697e4ee5ad18e7c71ce722fd2cd2c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50d7ad64-ddb4-4b5d-880e-f16f82dc3874.json and https://artists.proofprofile.net/proofs/artist/50d7ad64-ddb4-4b5d-880e-f16f82dc3874.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wiń siebie (feat. Uszer zDP, Kiju, Penx) [with TMK Beatz]
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 0x679eba9cdee331a7fa1096bbb13a3a96251aefd9586ac02f8c92e6dbcea0f6c9. 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/PLI361806960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21dd6e2cf0469ece1bcabb02959030fbb0777b4a3ccc7869c011ef71b17beb1. 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/PLUM72000102.
Zapomniałem (feat. Bazi & Demon & Repeat & Uszer zDP & Zygson) [with Baran]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9291d163ee19561ba74268832b2c3a4230734ce2bf8ddc5c234e2d126c4e674. 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/PLI361819190.
To tylko hajs (feat. Eripe, EsZet, Penx, Zygson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bf2e555913e11b10b747ac145f9723acf215c902c2b8145f9a87d69324f078. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLI361802020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ddbef4d9e07e5c4e52632098d3520eb63dc186597e10166866f9855cfc068b. 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/PLI361801950.
Zapomniałem (feat. Baran, Bazi, Demon, Repeat, Uszer zDP & Zygson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54abc5e69ac37cf02a2b529e6e7009e9341be0d82ec9f158018180bb7bdade64. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZES81945775.