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 0x13a94201e3ccfa146aa081d8d9e3be45833382e04e455d5e5a11d8e107fbec75. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a599f224-c6e0-4bb8-8ef2-4055670072b6.json and https://artists.proofprofile.net/proofs/artist/a599f224-c6e0-4bb8-8ef2-4055670072b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
IDĘ DO PRZEDSZKOLA – piosenka na rozpoczęcie roku
Piosenki z naśladowaniem – zabawy TUS dla dzieci o emocjach
Hej, hej przedszkolaki! Piosenka na Dzień Przedszkolaka
Autobusowa piosenka. Zabawa ruchowa i nauka liczenia
Raz, dwa, trzy - znam swoje ciało! - Nauka części ciała
Dzień Niepodległości – Polska piosenka patriotyczna
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 0x5c14fb97cc3747a7d3296fd14c92f8620cbc33fc9db5502e6a4063ebe3881ce2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7X2567534.
NIE BĘDĘ BIĆ, NIE BĘDĘ KRZYCZEĆ - PIOSENKA O SAMOREGULACJI
Małe obowiązki dzieci – edukacyjna piosenka dla przedszkolaków o pomocy rodzicom
Mikołaj’s Joy Is All Around /Super Christmas Song for Kids
Idzie Mikołaj po śniegu. Piosenka na Mikołajki dla dzieci – do występów w przedszkolu i szkole
Mikołaju mój kochany. Świąteczna piosenka dla dzieci o magii Bożego Narodzenia