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 0x3bfb300a1b25b8d4dcc99bd66807d40ea512e1d20aedfe4dcd8b311aece162be. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f130cd1d-3d6a-4f70-833b-a6922d36b898.json and https://artists.proofprofile.net/proofs/artist/f130cd1d-3d6a-4f70-833b-a6922d36b898.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Allerbeste Liedjes Van De Fabeltjeskrant
Iedereen is welkom hier (feat. Meneer de Uil & Isadora Paradijsvogel)
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 0x56d8237ab615a25ab8bbd412c9d75c6bf7b46021bc2cbe72921814e6931fcee4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLT341810003.
Hallo meneer de Uil (feat. Meneer de Uil)
We streven naar de top (feat. Meneer de Raaf)
Het vrolijke lied van Boris (feat. Bor de Wolf)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195492a7e9238db1a1a65c8781309ffe544f2b4bb4c9209d69d581d00ce41266. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/NLT341910005.
Vliegbrevet (feat. Stoffel de Schildpad)
Stap maar door (feat. Juffrouw Ooievaar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dedb24529ca6ccac034826807da0467992d121fbf476f2a07d7664c9630ca99. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:43:03Z), 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/NLT341910006.