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 0x48ebf401319be166574acf4f02670d71cabec6d87b87b80e451bb9eb0183aa5f. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ecb94d1-ef20-46cc-b3c7-d2d1b1508688.json and https://artists.proofprofile.net/proofs/artist/8ecb94d1-ef20-46cc-b3c7-d2d1b1508688.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x18780a936fdea94947b337eccb55fd27f492b2438ed1aaf70fe0eddafb641560. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500506 — a six-check JSON result.
Fuck the Fame feat. Junes / Pih / DJ Perc
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c11c136daad7aafb8d28a9aced86cd2ece55338401a87888c370a03e2c114c3. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500507 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118dcbb9295aef29aec46ffa1ae68645d4ab6acb13cdad078f2e7cd912490d68. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500508 — a six-check JSON result.
Niesmak feat. Toster / JNR / Ad.M.a / DJ Danek
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86b1a3e527ba1a00961049079edb7ac00eaf8d8fd894344fd945da1af336bed. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500509 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739f5397c3d5f30c51b56e68893392a9d4ccc58346f821b98c3496593125e365. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500510 — a six-check JSON result.
Papierowy Samolot feat. Hukos / Cira / DJ Falcon1 / DJ Vazee
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a71f2c6049f7b5c900abefa5daa394a032a5f54c168a559985648d920924b1f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500511 — a six-check JSON result.
To Miasto Nienawidzi Nas feat. Bonson / Green / DJ Perc
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677db9c8d71c68652d8532ad8c211da8ff5ca650c8143f30f867f34a07b8abdc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500514 — a six-check JSON result.
Normalna Sprawa feat. LaikIkeOne / DJ Te
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb9df738f7650b4ecf096853373479cd1128f6f1a9685ed00505fdffc11e9b6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500515 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3207cc300ae3693ef48f16af76418cb284c5c311547f179094c1a0465cf506. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500516 — a six-check JSON result.
Mr. Perfect feat. PeeRZet / Pyskaty / DJ Te
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb08c776a2b4bf2025cdf1a735ecfabeebf2e6166996d602c6fb300dad0d2ba7. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500517 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753a2561c77b39933d8698d3d66f58a876fc9f49524b7f316d2a9fb56367ede5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500518 — a six-check JSON result.
Nierówno Pod Sufitem feat. Oxon / Revo / DJ Roka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa999ec510f66b9a48df9c9f1bf73861d8ee5351fe531f94673f7e33b77c1fa4. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500520 — a six-check JSON result.
Ulic Śpiew feat. EMAS / Stillo / Erking / Flojd / DJ Noriz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b8d91e6c5208c6586a7f6a4815d9697680477f46062fff083299f659390589. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500521 — a six-check JSON result.
Drugie Życie feat. Erking / Egotrue / DJ Te
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4c14214b08cbfa5e001e497c9bb53d16ba2ad793dab554b1b075c4b8df1ad3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH181500522 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cff107d124f6d283196a272acc9310e6f5f2df199903f2fecfaea9b2ad83fbe. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLF241401111 — a six-check JSON result.