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 0xa31f79cd6835914f1b05d2834c23d78a465b30615c5d545f8325c7799e1e275d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70325e79-9962-4beb-8cf4-08e94dc055a1.json and https://artists.proofprofile.net/proofs/artist/70325e79-9962-4beb-8cf4-08e94dc055a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Krople Natury. MusicTherapy - Drops of Nature
Wiejska Zagroda. Naturalne Odglosy Zwierzat z Wiejskiego Ogródka
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 0x028430f3753071b527e6ee44e85626fa7156a4ccf46f2cafb04287d01cd9a1cb. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:08:38Z), 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/PLA800607019.
Zgadnij jaki to ptak? Rozpoznawanie głosów ptaków z przewodnikiem
Guess the bird? Recognizing the voices of birds, with a guide
Exceptionally pretty and original thrush and robin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aeb67a6b5bf2f036d0fc6fdf89a8f25e7ff386783907216eaea7f24b248b00. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLA802335701.
Blackird, robin, blue tit and marsh warbler
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89319c89d6668a02a1554d23c145517068204debd8ffa64ccf6d400d0c113c10. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLA802335706.