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 0x46602ee186d99550bfa27bd050cbd15633fadad1bdf2f4c64856e5c81c4d80c1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94bbe344-bc03-48e9-8db9-da30948f61dd.json and https://artists.proofprofile.net/proofs/artist/94bbe344-bc03-48e9-8db9-da30948f61dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bez smutku na twarzy (feat. Dudek P56, Kaczy, Żary JLB)
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 0xb4f2aa19aa4991d7bbc9a2521b1b63c40e5da5971d2c6561d3e3baae6c259a9b. 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/PLF241906114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f1c0a325f62e634d75f908b22b14aa7dde650e3e800243980b2aa1b0629d57. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USJ3V1222651.
To nas chce ulica 2 (feat. Murzyn, TPS, Arczi $zajka, Dudek P56, Wieszak, Nizioł, Kaczy, Kafar Dix37, Rest Dixon37)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511d23bf7180b83b5c67de111dd5e2aac3d681d6860a6b1f6e0bc9decbdb386e. 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/PLF241705764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd6abce7e0e9d4b97ac5eff023f6397550048c8fe00b4fd1560b04fcd3b29c9. 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/PLF242210364.
Banita Team (feat. Egon, Kaczy, Parol, Chińczyk, Profus, Wuzet, Murzyn, Żabol, Fidzi, Solak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5889170ec3126b9038d490bb09f3da9202e42e9d0f99346728ae2f7f60466e. 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/PLF241704197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6a8d4a8e9add5d39e0dd0a8ac5f58c677e97b37552d2c5a401ecf7de2d2c67. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/PLF241704201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04874e5ab076703b5708c08e0344b95473d68996d600c0a9125178b945e3ebb. 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/PLF241602551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d58372b9248fc70ec6b7f69d23044fe4836d9c31536c7cdef2acd849ea2b1ee. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PLF241602559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaf16fc03e837f08195d83631e4f7a0d51cdfc70befc56a652b23bdffeae3cd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLI367187420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a3a7afb11a4ff18f9b1076956fe54339a36dc0eebf349f45d9afaccc0bbbc4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/PL25F1901008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efa95ff63ced40c1da11d89d608884bb8eeb173dfb2c963d1f281ddc0c35371. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/PLL371400197.
Fala Nienawiści (feat. Chaos, Kaczy, Szoku, Brodinio, Buśka, Kriso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe228e69304394a6d64a89bd09f734fbaf59098e18bcde54c9fd3b2fe1307f44d. 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/PLF242208791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a3a7afb11a4ff18f9b1076956fe54339a36dc0eebf349f45d9afaccc0bbbc4. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/PL25F1901008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00351ae75306b67fb1bdd50cc51a29bdb0dae4b38f3a69335a88e72d93648b5e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PL86E2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f2aa19aa4991d7bbc9a2521b1b63c40e5da5971d2c6561d3e3baae6c259a9b. 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/PLF241906114.